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AG-E-E-2209-RO2

ASTER LEVEL 1DATA PRODUCTSSPECIFICATION

(GDS Version)Version 1.2

September 3,1998

ERSDACEarth Remote SensingData Analysis Center

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Revision History

No. I Title I Rev. 1 Date1 I ASTER evelData roducts p ecification I Ver. p I Oct. 18, 1996

(AG-E-E-2076-ROO)2

Jul. 24, 1998er. 1.2STER Level 1 Data Products Specification

Nov. 10,er. 1.1STER Level 1 Data Products Specification

Jun. 30, 1997er. 1.0STER Level 1 Data Products Specification(AG-E-E-2209-ROO)

(AG-E-E-2209-R01) 1997

(AG-E-E-2209-R02)

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Change Details-1 (1/6)(Ver. p Ver. 1.0)

Updateommentsbasedn Ver. p) IVer. p IVer. 1.02.2 Data Structure

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Change Details-1 (2/6)(Ver. p Ver. 1.0)

I.........

i che. i Relative Scan Numbe r changed to Time Tag......................................................... ....................................... ...............................................

i Table 2.3.3-1 i Table 2.3.3-1. ~. .j....................................................................................................................................................r:................................................ ; jj chg. j Note changed to Note 1.j add. [ Note 2 (desc riptions about spacecraft time format)

.~Y ................................................ ................................................

j p.2-49 ip.2-30: .....................................................................................................................................................................................................i i............................................... ................................................- iNote 2

2.3.4.1 Ove rview~ - ~

, ~ . . v g r ~ ~ ~ . n ~ ~ ~ . . a ~ ~ . . c l a s s . . r . . ~ ~ ~ . a ~ ~ . ~ . ~ ~ ............... ,. ................................................................................................i..................hg. vgroup name: VNIR-Group is changed to VNIR . i.................................................2-50 i p.2-32I add. f vgroup class: 1A (processing level)

..................................................................................................................................................................................... + ?...- Ip.2-32

2.3.4.2 VNIR Band 1 Swath..........................................................................................................................................................................................................New data field RadiometricCorrTab le s added to Table 2.3.4-1 and 2.3.4-2.I chg. i Dimension Size of eac h filed: Num ber of lattice point is revisedj Table 2.3.4-2 j Table 2.3.4-2

i chg. !Table 2.3.4-2 . Table 2.3.4-2i.................. Segmented Time Code. i i

_. ........................................... ...:...............................................

i.................. ....................................................................................................................................................................................i i...............................................................................................i Observation Time: Rewritten to match with CCSDS Day................................................................................................................................................................................... ................................................ ................................................

i add. iRadiometric correc tion table - i Table 2.3.4-1,2 I2.3.4.3 VNIR Band 2 Swath2.3.4.4 VNIR Band 3N Swath

- The de scriptions of these objects are omitted on account that these objects are created in the same manner(similar to VN IR Band 1 Swath).

2.3.4.5 VNIR Band 3B Swath........................................................................................................................................................................................................................................................New d ata type RadiometricCorrTab le s added to Table 2.3.4-3. .:. ..............................................1 chrr. Dimension Size of each filed: Numb er of lattice point is revised/ Table 2.3.4-3 ITable 2.3.4-3 I

i Observation Time: Rewritten to match with CCSD S Dayi chg. j f Table 2.3.4-3 [ Table 2.3.4-3.................. .........egmented Time Code.j add. j Radiome tric correction table iTable 2.3.4-3

- These ob jects are deleted from Level 1A Data Produc t to reflect the chang ing data type.

j * ........................................................................................................................................................................................................................................................................-

2.3.4.6 R adiometric Correction Table

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-.3.1.

del. Several objects described in Italics

chg. iSeveral objects described in Italics

j Item1.2, -12.3, 13

i Item 12.1- I Item 10.7-.................I + .................................................................................................................. ....................................................................................................................................................................................i j

.....................................................................................................................................................................................

...............................................................................................mv . . GenerationDateandTime j Item 4 i Inventorymetadata................. ....................................................................................................................................................................................i ...............................................................................................add. f Scene Orientation AngleGDS Generic Metadata:

- j Item0.9

- GDS Generic Metadata s newly added to reflect the discussion results in the A STER Science Team (inconsideration).

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Change Details-1 (5%)(ver. p * er. 1.0)

Update C omments (basedner. p) 1Ver. p IVer. 1.03.3.1.3 Product Spe cific Metadata(V NIR)

- HDF file attribute name is changedonaccount of T oolkitsupdate.- Descriptionsof some items in Product Spe cific Metadata(VN1R) have been m odified to reflect thediscussion results inhe ASTER Science Team. (x= 1 -4)

- The descriptions of items concerning VNIR B and-2,3N,3B are om itted on account that these items arej ..................reated in the ame manner (similar to VNIR Band-1>.j chg. j Image Statistics: Description is revised. I Item x.2 j Item x.2

................................................. ....................................................... ........................................................ ........................................................ ........................................

i chg. NumbedList of Bad Pixels: Descriptions are revised. I Item x.3.1,2 Item x.3.1i chg. iProcessing Param eters: Description s are revised. i Item x.4 : Item x.4i chg. ; i Item x.5.......................................................................................................................................................................................................... I ............................................... : ............................................

i Unit Co nversion Coefficients: Offsetvalue s evised, and 2 Item x.5: other parameters are deleted.

3.3.1.4 Pr oduct S pecific Metadata(SW1R)- HDF file attribute name is changed on account of Toolkitsupdate.

i Map projection: S upported map projection is revised.i chg. (Mercator+ SOM)! p.3-51 j p.3-211.................. ............................................................................................................................>.................................................. 6. . i ................................................ 1................................................i chg. vgroup name: VNIR-Group is changed to VNIR. ip.3-51 !p.3-21i add. vgroup class: 1B (processing level) - ip.3-21).... ..................................................................................................................................................................................................................................................................................................

1.3.2.2 VNIR Band 1 Swa th1.3.2.3 VNIR Band 2 Swa th1.3.2.4 VNIR Band 3N Swath1.3.2.5 VNIR B and 3B Swa th

1.3.3.3 VNIR SuDDlement Data- These ob jects are deleted on accoun t that all images are stored to one swath at e very subsystem .

- VNIR Supplement data is added as a new data objectVNIR Supplement.

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Change Details-1 (6/6)(Ver. p * er. 1.0)

Update Comm ents (based on Ver.p) IVer. p IVer. 1.03.3.3 SW IR Group

- The contents of SW IR Group are modified to reflect the discussion results in the ASTER Science Team.- All image d ata are stored toonly 1 Swath Object mapping with the new ly added geolocation..........................................able.i chg. /vgroup name:WIR-Group is changed to SWIR. j p.3-55 Ip.3-23j .................. ....................................................................................................................................................................................1I add. Ivgroup class: 1B (processing level)

j Dimension S ize of geolocation fields: Number of lattice pointITable 3.3.3-2, ii chg. I .: 1s revised

. Table 3.3.4-2

j Block Siz e: Block S ize is revised.i chg. i

. . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . .:..

..............................................................................................- f p.3-23j .................. .. .........

: ................. : .................................................................................................................................................................................... * ...............................................i. .i 4, 6, 8, 10, 12

I 58,59,60

...........................................i p.3-55,56957, ip.3-23

3.3.3.2 SWIR Ban d 4 Swath3.3.3.3 SWIR Band 5 Swath3.3.3.4 SWIR Band 6 Swath3.3.3.5 SWIR Band 7 Swath3.3.3.6 SW IR Band 8 Swath3.3.3.7 SW IR Band 9 Swath

- These objects are deleted on account that all images are stored to one sw ath at every subsystem.

- SWIR Supplement data is added as a new data object SWIR Supplement.

- The contents of TIR Group are modified to reflect the discussion results in the ASTER Science Team.

I chg. vgroup name:IR-Groups changed to TIR. Ip.3-61 ip.3-25i .......................................................................................................................................................................................................i ............................................... ij add. vgroup class: 1B (processing level)

3.3.4.3 SW IR S upplement Data

3.3.4 TIR Group

, ~ . . ~ ! ! . l , ~ ~ ~ e . . d ~ ~ ~ . . a r ~ , . ~ ~ ~ ~ e ~ . ~ o . . ~ ~ ! ~ , ~ . ~..........................................................................- j p.3-25

3.3.4.2 TIR Band 10 Swath3.3.4.3 TIR B and 11 Swath3.3.4.4 TIR B and 12 Swath3.3.4.5 TIR Band 13 Swath3.3.4.6 TIR Band 14 Swath

3.3.5.3 TIR Supplement Data

Abbreviations and Acronyms

There are som e additional corrected and modified parts that are hardly interpreted on accountof the obscured expression.

- These objects are deleted on account that all images are stored to one swath at every subsystem.- TIR S upplement datais added as a new data object TIR Supplement.

- Abbreviations and Acronyms are refreshed.

NOTES:add.: added itemchg.: changed itemdel.: deleted itemmv.: moved item

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Change Details-2 (U3)(Ver. 1.0 Ver. 1.1)

Update C omments (basedner. 1 .O) IVer. 1.0 IVer..11.1.1 Applicable Docum ents.

...................Some of the documents were revised, and the newest version of them apply to this specification./ chg. j Algorithm Development Specification: ASTER Level-1 Dataf p. 1-1 ; p.1-1

; chg. iASTER Level1 Data Products Specificationj chg. f Interface Specification: ASTER Level-1 Data Processing f p.1-1 ; p.1-1

........................................... ................................................ ................................................ ................................................ ................................................ .....................

i...................ProCes?!!% ......................................................................................................................................................i .............................................................................................i 4 4 j

j p.1-1 j p.1-1.................. ..................................................................................................................................................................................................................................... .............................................

1.3 Time Code Format- The misprinting in the description about decimal fraction of a second(d+d), is corrected.- The descrip tion of the Sp acecraft Time Format is slightly revised to remov e the obscured express ion.

- .....Ancillary Group is added to the figure of thedata structure.i add. j Ancillary Group ! Figure 2.2-1 j Figure 2.2-1

2.2 Data Structure..............................................................................................................................................................................

2.3.1.1 Inventory Metad ata- The description of the B oundingRectangle is slightly changed to remove the obscured expression.- The description of the SingleDateTime is slightly changed to remove the obscured expression.

................... .................................................................................................................................................................................... .............................................................................................f chg. 1BoundingRectangle f Item 6 j Item 6i chg. SingleDateTime i Item7 j Item 7

- The format information is added to the description of the IDofASTERG DSDataGranule.- The data stored in the elements of SourceDataProduct are changed. It is because D ataID (Data ID)

................eneration, N/As are stored in those elements.f chg. IDofASTERGDSDataGranule j Item 1 I Item 1j chg. j SourceDataProduct. j Item 8 f Item 8

- The nom inal values for Geom etricCorrection are corrected. In version 1O, the nominal values in

- The data stored in the Conun it of UnitConversionCoeff s are added to the descriptions.- The decriptions and the objects are added to the DestripeParameters. (TBD in V er. 1O)

I..................* ...................................................................................................................................................................................................................................................................................

2.3.1.2 ASTE R Gen eric Metadata

and GenD T (Generation Date and T ime) of Level-0 data cannot be acquired by PGE during Level-1A .................................................................................................................................................................................... .............................................................................................

,................. * .................................................................................................................................................................................... + ...... ........................................................................................

2.3.1.4 Product Specific Metadata(VN1R)

along-track direction and those in cross-track direction were described oppos itely.

...................The nominal.............................................................................................................................................................................alue of N cycles ofFirstPixelAddressGroupis changed..............................................................................................o 10.I 1chg. IGeometricCorrectionl, 3N , 3B i Item 1.3,.3, Item 1.3, 3.3,

.........................................................................................................................................................................................................I ............................................................................................4.3 :4.3j chg. UnitConversionCoefffl, 3N, 3B i Item 1.6, 3.6, Item 1.6,.6,

i chg. f DestripeParameterl, 3N, 3B f Item 1.7, 3.7, f Item 1.7, 3.7,

i chg. i FirstPixelAddressGroup f Item 4.7 f Item 4.7

- The data stored in the ConUnitof UnitConversionCoeff s are added to the descriptions.

; 4 i ..............................................................................................4.6 j 4.6.................. .....................................................................................................................................................................................

, t......-............ ~ ...............................................................................................4.8 j 4.8.................. ..................................................................................................................................................................

2.3.1.5 Product S pecific Metadata(SW1R)

1 ...................The d ecriptions1 and the objects are added to the DestripeParam eters. (TBD in Ve;. 1O>.................................... ..................................... ...................................... ..................................... ..................................... ..................................... ..................................I che. I UnitConversionCoefff4 I Item 1.6 I Item 1.6Y : .........................................................................1chg. /DestripeParameter4 j Item 1.7 j Item 1.7

- The data stored in the Conunitof UnitConversionCoeff s are added to the descriptions.2.3.1.6 Product Specific Metadata(T1R)

I - The decriptions and the objects are added to the DestripeP arameterk (TBD in Vei. 1O>.................................................................................................................................................................................................................................................. .:..............................................i cha. fUnitConversionCoeffflO ! Item 1.6 f Item 1.6. - .I ........................................................................................................................................................................................................................................................ i ..............................................I chg. i DestripeParameterlO ! Item 1.7 f Item 1.7

2.3.2 Cloud Coverage Table1 - The descriotion of characteristics is mod ified to remove obscuritv.

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Change Details-2 (2/3)(Ver. 1 O Ver. 1.1)

2.3.5.8 SW IR Supplement Data- The misprintsin the dimension size and in he nom inal record count number are corrected.

I ................... ...........................................................................................................................................................................................................................................................................The misprints..... in the item numbers in Table 2.3.5-4 are corrected. -i chg. !No. (Item number) 12- 9 i Table 2.3.5-4 j Table 2.3.5-4- ;2.3.6.7 TIR Supplem ent Data

- The m isprint in the nom inal record count number is corrected.- The nominal record count number for C hopper and Encoder data is added.

3.2 Data Structure- ..................Ancillary Group is added to the figure of the data structure.j add. Ancillary Group i Figure 3.2-1 Figure 3.2-1

- The format information is added to thedescription of the IDofASTER GDSD ataGranule.- The data stored in the elements of SourceDataProduct are changed. N/A is stored in DataTyp (Data

................................................................................................................................................................................ ............................................................................................

3.3.1.2 ASTER Generic Metadata

...TYP.g....................................................................................................................................................................................-................................................. :... ........................................1 ! cha. I IDofASTERGDSDataGranule I Item1 I Item 1; ;.. .....................................................................................................................................................................................................t. .... .......................................................................................chg. ; SourceDataProduct. I Item 8 i Item 8. - .

3.3.1.4 Product Specific Metadata(VN1R)...................The data....................................................................................................................................................................................tored in the C onUnit of UnitConversionCoeff s are added to.........................................................................................he descriptions.i chg. 1UnitConversionCoefffl : Item 1.5 I Item 1.5

3.3.1.5 Product Specific Metadata(SW1R)

....................The data.......................................... ................................................ ................................................ ................................................ ................................................ .....................tored in the ConU nit of UnitConversionCoeff s are added to the descriptions.I chg. IUnitConversionCoefff4 I Item 1.5 I Item 1.53.3.1.6 Product Specific Metadata(T1R)

...................The data stored in the ConUnit of UnitConversionCoeff s are added to the descriptions.I cha. IUnitConversionCoeffflO I Item 1.5 i Item 1.5

..................................................................................................................................................................................... .........................................................................................

3.3.2 Ancillary Data- The descriptio n about vgroup, which co nsists of Ancillary data records, is added.- The nom inal record number is m odified to reflect the discussion results with the AST ER Science Team.

- Dimension Size of geolocation field is redesignedto reflect the d iscussion results with the ASTER

i chg. j Dimension Size of Latitude and Lon gitude ! Table 3.3.3-2 Table 3.3.3-2

3.3.3.2 VNIR Swath

Science Team.....................

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Change Details-2 (3/3)(Ver. 1 O - Ver. 1.1)

Update Com ments (based on Ver. 1O) IVer. 1.0 IVer. 1.1There are som e additional corrected and modified parts that are hardly interpreted on accountof the obscured

Iexpression.NOTES:

add.: added itemchg.: changed itemdel.: deleted itemmv.: moved item

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Change Details-3(Ver. 1.1 + Ver. 1.2)

Update Com ments (based on Ver. 1O) IVer. 1.0 IVer. 1.11.1.1 Applicable Documents.

- Some ...............................................................................................................................................................................................................................................................f theocuments were revised, and the newestersion of them apply to this specification.i chg. Algorithm Development Specification: ASTER Level-1 Datai p. 1-1 ; p.1-1

i chg. ASTE R Level1 Data Products Specificationi chg. f Interface Specification: ASTER Level-1 Data Processing ; p.1-1 ; p.1-1

...................

i..................races%%.....................................................................................................................................................;...............................................................................................i p.1-1 ! p.1-1

: .................... ...................................................................................................................................................................................................................................................................................

1.6 Map Projection Parameters

2.2 Data Structure- The descriptionsof the map projection parameters are added.

- Ancillary Group is added to the figureof the data structure................................................................................................................................................................................................... .................................................................................................i add. ; Ancillary Group ; Figure 2.2-1 I Figure 2.2-1

2.3.1.2 ASTER Generic Metadata

NOTES:add.: added item

chg.: changed itemdel.: deleted itemmv.: moved item

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PREFACE

This Specification defines evel-1A and1B Data Products (GDSversion), which are generated from thesofnvare of ASTER Level-1 Data Processing Subsystem (Version 2.0).

ACKNOWLEDGMENT

The ASTER level-1 data product generation o h a r e needs the GTO P030 n the processing ubsystem. Thesedata are distributed by the EROS Data Center Distributed Active Archive Center (EDC DA AC), located at theU.S.Geological Surv eys EROS Data Center in Siou x Falls, South Dak ota.

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1. Level 1 Overview

1.1 Applicable Standard sThis sectio n identifies documen ts that directly apply in defining this interface specification, and thosereference docum ents that indirectly apply to obtain background information related.

1.1.1 Applicable Docum ents

The following documents apply to this S pecification in who le, unless cited otherwise herein.

[ 11 ERSDAC -LEL/8-9 Algorithm T heoretical Basis Document for ASTER Level-1 DataProcessing (Ver.3.0), prepared by Level-1 Data Working G roup,ASTE R Science Team, Japan, Nov.1, 1996

[ 21 ERSDA C-LEL/9-16 Algorithm D evelopment Specification: ASTER Level-1 Data

Processing (for Ver.2.2A), Mar. 3 1, 1998 (in Japanese)[ 31 ERSDA C-LEL/9-13 ASTER Level 1 D ata Products Sp ecification (Science Version,Ver.2.3), Nov. 30, 1997

[ 41 ERSDAC Interface Specification: ASTER Level-1 Data Processing (forVer.Z.O+), Mar. 31, 1998 (in Japanese)

[ 51 AG-S-E-0409-R03 ASTER GDS Core Meta Data Specification (Version 1.0 Draft),Jul. 3, 1996

1.1.2 Reference Docum ents

The following documents are used as background reference documents related to this Specification.

[ 115 10-ICD-EDOS/ASTER Interface Control Document between EDOS and ASTER

[ 21 CCSDS 641.0-B-1

[ 31 CCSDS 301.0-B-2[ 41 170-TP-005-003

[ 51 170-TP-006 -002

[ 61 non e

[ 71 WBS-W P-003-001

[ 81 333-CD-004-001

[ 91 3 11 CD-002-005

~ ~

GDS, CDRL B311, Revision 1, Jan. 22, 1997Parameter V alue Language Specification (CCSD006), Blue Book,May 1992Time Code Formats, Blue Book, Issue 2, April 19 90HDF-EO S Library User's Guide for the ECS Project, Volume 1:Overview and Examples, Hughes Information Technology Systems,Apr. 1997HDF-EO S Library User's Guide for the ECS Project, Volume 2:Function Reference Guide, Hughes Information TechnologySystems, Apr. 1997HDF User's Guide Version 4.0r2, the National Center for Super-computing Applications at University of Illinois at U rbana-Champaign., Jul. 1996The HDF-EO S Swath Concept, A W hite Paper for ECS Project, Jun.30,1995Release B.0 SCF Toolkit Users Guide for the EC S Project, Apr.1997Science Data Processing Segment (SDPS ) Database Design andDatabase Schema Specifications for the ECS Project, May 1996

[lo] ERSDAC-LEL/9-18 ASTER Browse Data Products Specification (Science Version,

[111 ERSD AC-LE L/7-5 Interface Specification: ASTER Level-1 Data Processing (for Ver.Version 2.1), Mar. 31, 1998

a, Ver. p), 1994 (in Japanese)

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1.2 Coordinates Systems

This section describes the definition of the following coordinates systems used in this specification;

- Spacecraft Reference F rame- Orbital Reference Frame- Earth-Centered Inertial Coordinates System- Earth Greenwich Coo rdinates System

Note: A bove all coord inates systems are a Cartesian coordinates system, forming a right-handedcoordinates system.

(1) Spacecraft Reference Frame- attitude reference frame of spac ecraft bus

[Origin] Spacecraft Center of Mass[Reference Direction ] X-axis : Roll axis

Y-axis : Pitch axisZ-axis : Yaw axis

(3) Orbital Reference Frame- reference frame of flight attitude on orbit

[Origin] spacecraft Center of Mass[Reference Plane] X-Y Plane : normal to the position vector

[Reference Direction] X-axis : the vector cross product between Z-axis and Y-Z-axis : directed toward geocentric nadir

axis that is norm al to the orbit, anti-parallel tothe angular momentum

(4) Earth-Centered Inertial Coordinates System (Mean Equator and Eq uinox of J2000)[Origin] Center of the Earth[Reference Plane] X-Y Plane : plane of Earth's mean equator

[Reference Direction ] X-axis : directed toward the vernal equinoxZ-axis : along Earth's rotational axis, with north positive

(5) Earth G reenwich (Earth-Centered Rotating: ECR) Coordinates System[Origin] Center of the Earth[Reference Plane] X-Y Plane : plane ofarth's equator

Z-axis : along Earth's rotational axis, with north positive[Reference Direction] X-axis : directed toward the prime (Greenwich) meridian

1.3 Time Code Formats

Time and Date described in Level 1A and 1BData Products are expressed in two formats; CCSDSASCII Time C ode (A format) and Spacecraft Time Format (CCSDS Day Segmented Time Code:CDS). The time code formats can be represented as a combination of a preamble (P) field and a time

(T) field. But the P-field is implied and not actually transmitted (i.e., this inform ation is not included inthese products).Both time code formats are defined in CCSDS BlueBook, Issue 2, Time Code Formats, (CCSDS301.0-B-2) issued by the Con sultative Comm ittee for Space Data Systems (NASA Code-OS, NASA,Washington DC 20546), April 19 90.

(1) CCSD S ASCII Calendar Segmented Time Code (ASCII)CCSDS ASCII segmented time code is com posed of a variable number of ASCII charactersforming the T-field. ASCII time code variations are UTC (U niversal Time C oordinated)based and leap second corrections are made.The format for ASCII Time Code A as used in AST ER Level-1 Data Processing Subsystem:

YYW-MM-DDThh:mm:ssZ

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where,Y Y W"DD

Thhmmss

d+d

Z

: a four character subfield for year, with value in range 1970- 038: a two character subfield for month with values 01- 12, leading zeros: a two character subfield for day with values in the range 01- om: a separator: a two character subfield for hours, with valu es00 - 3: a two character subfield for minutes, with values00 - 9: a two character subfield for seconds, with values00 - 9

(where eom is 28 ,29 ,30 , o r 31 according to the month)

(00 - 60 in a positive leap second interva l,00 - 8 in the case of negativeleap second)

digit in range0 - (optional): an n-character sub field, (n0 6), for decimal fraction of a second, with each I

: a terminator

(2) Spacecraft Time Form at (CDS)Spacecraft Time Format contains the 64-bit CCSDS Day Segm ented Time Code @ST) T-field. Spacecraft Time Code con sists of a selected number of continuous time segments.Each segm ent represents the state of a binary counter, cascaded with the adjacent counters,which rolls over at a module specified for each counter.

Width (bits)

32

Daysays since 1958 January 1 . The first bit is always'0'.6Unitsescription

Microsecond of M illisecond (number microseconds in16

mseccurrent day)Millisecondof Day (number milliseconds since begining o f

0urrent millisecond) I

1.4 Data T ype Definitions

These definitions are used in com parison expressions to determine the type of data products.

1.5 Strip Observation Mode

Following definitions are used in comparison expressions to determine the strip observation mode.Table 1.5-1 shows the methodological concept for deciding the strip observation mode at sensoroperate. Table 1.5-2expresses the conceptual view of the strip observation mode.

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.......................................u.............................................................. ........... . .......

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Table 1.5-2 Concep tual viewof strip observation mode

Sensor Sensor operation by mode based on time coordinateTime

VNIRl

VNIR2

SWIR

TIR

VNIRl

VNIR2

TIR

SWIR

TIR

VNIR2

VNIRl

VNIR2

SWIR

TIR

SWIR

TIR

(1) VST (full) mode

(2) V mode

(3) T mode

(4) ST mode

(5) V Stereo mode

( 6 )VST+T mode

(7) ST+T mode

1.6 Map Projection Param eters

This section describes the definition of the map projection parameters used in L1B processing. Thesoftware uses the geo-coordinate transformation (GCT) tools, based on the commonly availablepackages gen eral cartographic transformation package (GCTP), co ntained in theSDP Toolkit routines.;

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Table 1.5-3 Projection Tra nsforma tion Package Proje ction Parameters Elemen ts (112)

Table 1.5-3 Projection T ransformation Package Projection Parameters Elem ents(2/2)

Array ElementANameUTM

12 I 1310

PSEQRECTSOM zeroFlagRa tSRev

NOTES:(*1) All array elements with blank fields are set to zero. All angles a re in radians.

(Longitude is negative west of G reenwich, Latitude is negative sou th of equator.)(*2) The software of ASTER Level-1 Data Processing Subsystem uses the TM in place of

UTM, for the treatments of the scene across the zone boundary.

where,

SMajor Semi-major axis of the ellipsoidSMinor Semi-minor axis of the ellipsoidSphere Radius of reference sphereSTD PRl Latitude of the first standard parallelSTDPR 2 Latitude of the second standard parallelCentMer Longitude of he central meridianOriginLat Latitude of the projection originFE False easting in the same units as the semi-major axisFN False northing in the same units as the semi-major axisLTrueScale Latitude of true scaleLongPol Longitude down below pole of mapFactor Scale factor at central meridianCentLat Latitude of center of projectionIncAng Inclination of orbit at ascending node, counter-clockwise from equatorAscLong Longitude of ascending orbit at equator

PSRev Period of satellite revolution in minutesLRat Landsat ratio to compare for confusion at northern end of orbit (ASTER: 0.5201613)PFlag End of path flag for Landsat:0 = start of path, 1= end of path (ASTER:0)zero 0.0

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2. Level 1A Data Product

2.1 OverviewLevel 1A Data Product is an HD F file. Each file contains a complete 1-scene image data extractedfrom Level-0 data and corrected for the SWIR and TIR detectors alignment.Furthermore it includes also the radiometric, the geometric and the SWIR p arallax correction tables,spacecrafts supplem ent data, the satellite ancillary data, and the calcu lated cloud co verage values.All of these data are stored together with Metadata, SDS, VgroupNd ata, and Sw ath Layout parts in oneHDF file.Level 1A Data defines a scen e center on the spectral imag e as (1, p), where 1 and p are estim atedfiom the following equations.

iranc(x) truncates the value to the greatest integral value less than or equal tox.

2.2 Data Structure

(1) Data TypeLevel 1A Data Product within HDF file is constructed from six categories of HDF data object.

Note: VNIR(4 bands) and SWIR (6 bands) image data are 8-bit unsigned integer science data,and TIR( 5 bands) image data are 16-bit unsigned integer science data, stored to the Swath objectat every band.

(2) Data S tructureThe physical format of Level 1A Data Product is shown inFigure 2.2-1.Data stru cture represented inFigure 2.2-1shows the conceptual viewof the physical format of the product in case of full mod e(VST) operation. Some category shall not set in the product, in case that it can not be applied to thedataset on accoun t of the selected operational mode; i.e.,V, V stereo, ST,T, etc.

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Leve llA DataPloduct

I

- 1Inventory Metdat a

ASTER GenericMetdata

GD SGenericMtadata

PmductSpedfc Mtdata(VNIR)

PmductSpedfc fitdata(SWIR)

Roduct* e c i f i C M S & d a l a FIR)Bad Pix1 hfomatims

Cloud Coverage Table

AncillayDab

VNIRGroupNIR Band 1 S w t h

7eoFilds(lD/2D)

DataFieHs (1D/2D)

, RadiomtricCoeffidettI ,

I ,

, ,. . . . . . . . . . . . . . . . . . . . . . . . ,

: VNIREland2 Swah 1 I ,I ,

I ,

......................... . . . . . . . . . . . . . . . . . . . . . . . . .

VNIRBand 3NSwath : I. ;- -- - non-trapping draa

mapping data.......................... . . . . . . . . . . . . . . . . . . . . . . . . . t . . . . . . . . . .

:VNIRBind3 B . S R a t h . .:SupplemntDah

, . . . . . . . . . . . . . . . . . . . . . . . . .

.........................

.........................

: SWIRBand4Swad I

: SWIRBand5 Swad j

: SWIRBand6 Swab j

: swIRBand7Swa41 I

~ ~ ~ ~ ~ ~ . ~ ~, . . . . . . . . . . . . . . . . . . . . . . . . ,

. . . . . . . . . . . . . . . . . . . . . . . ...........................

........................., . . . . . . . . . . . . . . . . . . . . . . . . ,

: Sl.%.Wd. !%a? . . I, . . . . . . . . . . . . . . . . . . . . . . . . ,

: SwLRBand9Swah j

SupplemntIBta.........................

........................., . . . . . . . . . . . . . . . . . . . . . . . . ,: TIRBand 11 Swad I

: TIRBand 12 Swad I......................... . . . . . . . . . . . . . . . . . . . . . . . ,.........................I . . . . . . . . . . . . . . . . . . . . . . . . ,cTIRBand 13Swad: TIRBand 14Sw ad I.........................Sup plane nt Ckoup 7 u p pl em t Te q

. . . . . . . . . . .. . . . . . . . . : tbseobjectsaresimhrto t Supplement ChopperS u p p l a n t & c od erVNIRBand 1 Swath.

Figure2.2-1 Physical Dataof Level 1A Data Product

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Table 2.3.1-1 L ist of O bjects in Inventory Metadata (2/2)

No.7

1

-9

-10

1

2-

3-

1112

13

TimeofDayCalendarDateReview I=

tring

FutureReviewDate string

QAStats

QAPercentMissingData double

QAPercentOutofBoundsData double

QAPercentInterpolatedData double

ReprocessingActual string

PGEVersion stringProcessingLevelID string

~

MapProjectionName Istring

DescriptionThis contains the time of day and

calendar date, at which the centerof the scene is observed.fo rm at: h h m m s s d 4 Zformat: YYYYMM DDThis block provides for dates andstatus as applicable for collectionthat are active.The date of the nearest planned QApeer review in future.format: YYYYMM DDThe date of the last QA peerreview.format: YYYYMM DDThis block contains measures ofquality for a granule.The percentage of m issing data inthe scene. Unit:%The percentage of out of boundsdata in the scene. Unit: %The percentage of interpolated datain the scene. Unit: %The stating what reprocessing hasbeen performed on this granule.{not reprocessed, reprocessedonce, reproc essed twice,reprocessed n times}The version of PGEThe classification of the sciencedata processing level: 1A The type of map projection used:N/A

NOTES:(* 1) Object types used in M etadata are

a. datetime: CCSDS A (UT C) Formatb. integerC. double: the floating point value is rounded to the appropriate number

d. string(6 digits after the decimal-poin t character).

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2.3.1.2 ASTER Generic Metadata

(1) Indexes of O bjectsThe Ob ject list ofASTER Generic Metadata is shown in Table 2.3.1-2. ASTER Generic Metadataattributes are written to theHD F file attribute named p roductmetadata.0.The baseline of the scene location is VNIR band 2 for a set of 3 sensors V+S+T, and others use SWIRband 6 or TIR band11 for S+T or T, respectively.ASTER Generic Metadata contains ASTER Parameters in Generic Header for ASTER GDS Products(about Generic header for ASTER GD S Products, see ASTER LEVE L 1 DATA PRODU CTSSPECIFICATION--Applicable[3]). The AST ER Param eters are the sp ecific attributes, i.e. notassociated with DID3 11.(In Table 2.3.1-2, group names are written in Bold cha racters. A grou p contains a set of objects that all

have a sim ilar theme.)

Table 2.3.1-2 Listof Object in ASTER Generic Metadata (1/5)

No.

1

234

5

Group/Object Name

IDofASTERGDSDataGranule

ReceivingCenterProcessingCenterPointingAngles

PointingAngIesContainer(n)*2SensorName(n)*2PointingAngle(n)*2SettingTimeofPointing(n)*2

GainInformation

GainInformationContainer(n)*2

type**

string

stringstring

stringdoubledatetime

Description

This provides a uniqueidentifier for locationof adata granule held in ASTE RGDS.Format:ASTL 1A YYMMDDHHMMSSyymmddNNNNwhere,YYMMDD:observationdateHHM MSS:observation timeyymmdd:the data granule

generation dateNNN N:the data granule

sequential No.(ner d a d

EDOS fixed.,ASTER-GDS ixed.Specification of the pointingangles of ASTER sensors.n = number of sensorsVNIR or SWIR or TIRpointing angle in degreesYYYY-MM-DDThh:mm:ss.d+dZThe informatio n of the gainlevel.This container contains the

level of the data acquisitiongain for VNIR and SW IR.

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Table 2.3.1-2 List of Object in ASTE R Generic Metadata (3/5)

1

2

-3

Group/Object NameQuadrantCloudCoverage

SourceDataProduct

InstrumentInformation

ASTEROperationMode

ObservationMode

ObservationModeContainer(n)

ASTERObservationMode(n)*2

*2

ProcessedBands

type*integer

string

string

string

string

DescriptionThe percentage for4

quarters of a scene.(qcul, qcur, qcll, qclr)where,qcul: upper leftqcur: upper rightqcll: lower leftqclr: lower right Unit:%The information about theinput data used forgenerating this Level-1Aproduct.(DataID, GenDT, DataTyp)where,DataID: N/A fixed.

GenDT: NIA fixed.DataTyp: Data type, PDSor EDS or DDS.

The information aboutsensors used to acquire data.The types of ASTERoperation.OBSERVATION orCALIBRATION orTESTThis group contains ASTERobservation m ode.The container of ASTERobservation mode.

The observation mode ofeach sensor group.(SGname, O bservation)where,SGname: VNIR1 or

VNIR2 or SWIR orTIR

Observ ation: ON (data isacquired) orOFF (datais not acquired, or notexisting in the granule)

The status of all bandsduring observation.Format: set of flagsdescribed as 2-bytes string.flag = 01,02,3N,3B,- 14(data of band 01,

02,3N,- 14 is usedin the granulegeneration)

corresponding tothe band positionmarked withXXis not used)

Example:Value= XXXXXXXXO4

= XX (data

~ s ~ ~ ~ ~ ~ R ~ Q I ~ I I

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Table 2.3.1-2 List of Object in ASTER Generic Metadata(4/5)

\lo.

1

2

5

6

7

fGroudObiect NameSceneInformation

ASTERSceneID

FlyingDirection

SolarDirection

SpatialResolution

SceneFourCorners

UpperLeft

type*

integer

integer

integer

string

double

integer

double

DescriptionThe information about the

scene concerning with thedata granule.The scene identifier definedby path, row and view.(path, row, view)where,path: 1-233 (nominal)row: 1-670view: 1-7(-1 for off-

The orbit number of thesatellite, when d ata isacquired.The satellite recurrent cycle

number and the revolutionnumber in the cycle.(cycle, revolution)where,cycle: 1-260 (max.)revolution: 1-233 (nominal)The satellite flight directionwhen observation is done.AS: ascending direction.DE: descending direction.

The sun direction as seenfrom the scene center.

where,

az: azimuth angle in degree.O . d a z < 3 6 0 . 0measured eastward fromNorth.

el: elevation ang le indegree.

- 9 0 . ~ 1 0 9 0 . 0The nominal spatialresolutions of VNIR, SWIRand TIR.(resolution of VNIR,resolution of SW IR,resolution of TIR)

This group contains theinformation about4 comercoordinates of the scene.This denotes the coordinatesof the upper-left comer ofthe scene.(lat, long)where,lat: geodetic latitudelong: geodetic longitude

nominal pointing)

6 2 , el )

Unit: meter

Unit: degree

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Table 2.3.1-2 List of Object in ASTER Ge neric Metadata(5/5)

9

Group/Object NameUpperRight

LowerLeft

LowerRight

Scenecenter

SceneOrientationAngle

type*double

double

double

double

double

DescriptionThis denotes the coordinates

of the upper-right comer ofthe scene.(lat, long)where,Formatsof these parametersare the same as Item 10.7.1This denotes the coordinatesof the lower-left com er ofthe scene.(lat, long)where,Formats of these parametersare the same as Item 10.7.1This denotes the coordinates

of the lower-right comer ofthe scene.(lat, long)where,Formatsof these parametersare the same as Item 10.7.1Longitude and latitude ofthe scene center.(lat, long)where,lat: geodetic latitude

-90.d71a6790.0long: East longitude

-180.d71ong480.0Unit: degree

This denotes the dihedralangle between the orbitalplane compo sed of theorbital motion at scenecenter (consider the sensorpointing angle) and themeridian at latitude ofL1Ascene center, within therange [-90.0,90.0] of thescene VNIR band2 for a setof sensors V+S+T. SWIRband 4 for S+T, and TIRband 11 for T alone are

used, respectively (Unit:degree).

NOTES:(* 1) Object types used in Metadata are

a. datetime: CCSDS A (UTC) Formatb. integerc. double: the floating point value is rounded to the approp riate number

d. string(6 digits after the decima l-point character).

(*2) Object whose name fo llowed by (n) has class attribute. It may repeat n-times.(*3) Level-1 data product generation software needs G TO P03 0 a s the source of the ASTER

Coarse DEM data., . . -. . . . . . . ^ . . . . . . . . . . - . . .

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2.3.1.3 GDS Generic Metadata

(1) Indexes of ObjectsThe O bject list of GDS G eneric Metadata is shown in Table 2.3.1-3. GDS Generic Metadata attributesare written to theHDF file named attributeproductmetadata.1.GDS Generic Metadata contains the generic header specified by G DS, for ASTER GDS products. Theattributes included in G DS G eneric Metadata are the specific attributes, i.e. not associated with DID311nor the ASTER Parameters.

Table 2.3.1-3 List of O bject in GDS G eneric Metadata

2 DofASTERGDSDataBrowseI

type*] Descriptionstring The redundant array of short

name for all sensors using ingenerating the product*2:

ASTER-VNIR,ASTER-SWIR,

ASTER-TIR,ASTER-STEREO,

string The ID of ASTER GDS browsegranule generated using thisLevel 1A data product.

NOTES:(*1) Object types used in M etadata are

a. datetime: CCSDS A (UTC) Formatb. integerc. double: the floating point value is rounded to the appropriate number

d. string

e.g., for a set of sensors V+S+T: (ASTER-VNIR, AST ER-S WIR , ASTER-TIR)for S+T: (ASTER-SWIR, ASTER-TIR)

(6 digits after the decimal-po int character).

(*2) This item SensorShortName contains all available sensor short names.

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2.3.1.4 Product Sp ecific Metadata(VN1R)

(1) Indexes of ObjectsThe Object list of Product Spe cific Metadata(VN1R) is shown in Tab le 2.3.1-4. Prod uct SpecificMetadata(VN1R) attributes are written to the HDF file attribute named "p rod uct me tad ata .~" .Product Specific Metadata(VN1R) includes product pecific attributes, i.e. not as sociated with DID311.(In Table 2.3.1-4, group namesare written in Bold characters. A group contains aet of objects that allhave asimilar theme.)

Tab le 2.3.1-4 List of Object in L evel 1A Product pecific Metadata(VN 1R) (1/7)

L

No.1

1

-2

1

-2

-3

Group/Object NameVNIRBandlData

ExtractionfromLOl

ExtractionffomLOlContainer(n)*2RSCl(n)*2

SSTl(n)*2

mageDataInformation1

type*

integer

datetime

string

integer

DescriptionThe informationahoutVNIR band 1 of Level- 1A .The information about the

"".

extraction fromLevel-0Group-1 PDSs (PDSs

contains VNIR band andband 2 strip data) in order tomake VNIR Band 1 Data.

RSC (relative scan count) ofthe first (n= l) or the ast(n=2) scan( 2 0) . RSC isscan count in each PDS .SST (scanstart time) of thefirst ( n =l ) or t he la st ( ~ 2 )

Identifier of PDS ncludingthe first (n= l)or the last

(n=2) scan.The information f VNIRband 1 image data.

where,npx: Number of ixels per

line (4100: fixed)nln: Numb er of lines in

frame (4200:nominal)bpp: Bytes per ixel

(1: fixed)

scan.

(npx , nln, bPP)

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Table 2.3.1-4 List of Object in Level 1A Product Specific M e ta d a ta V IR ) (217)

3

~

4

I

GroudO biect Name

RadiometricCorrectionl

DataQualityl

NumberofBadPixels1

UnitConversionCoeffl

Incl1Offset1ConUnitl

DestripeParameterl

type*integer

integer

integer

doubledoublestring

DescriptionThe information of VNIR

Band-I Swath geolocationfield.(nlpat, nlpct, dlpat, dlpct)where,nlpat: number of lattice

points in along-trackdirection.(12 : nominal)

nlpct: number o f latticepoints in cross-trackdirection.(1 1 nominal)

dlpat: distance between twoneighbor lattice pointsin along-track direction.(400: nominal)

dlpct: distance betweentw oneighbor lattice pointsin cross-track direction.(4 10: ominal)

The information of VNIRBand-1 radiometriccorrection table (stored inVNIR Band-1 Swath).(ndct, npara)where,ndct: number of detectors

used. (4100: fixed)npara: number ofparameters

This group con tains theinformation about thequality of Level 1A VNIRRand-1 data.

(3 : fixed)

The inform ation about badpixels.(nmp, ndd, nelm)where,nmp: number of missing

ndd: number of damaged

nelm: number of elementsof

the list of bad pixel^'^.This group c ontains thecoefficients used forradiance conversion, fromthe pixel value of the band-1image.Inclination ValueOffset ValueConverted UnitW / m 2 / s r h 7 f ixe d.This group deno tes theinformation about destripe

pixels.

detectors.

. I - 1 .

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1 Total numberof destripentegerumberofParameters1parameters.

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Table 2.3.1-4 List of O bject in Level 1A Produ ct Specific Metadata(VN1R ) (417)

I ataQuality3N

No.RadiometricCorrection3N4Group/Object Name

-

-

-

-6

1 NumberofBadPixels3N

UnitConversionCoeff3N

I

I 1 I Incl3NI

onUnit3N

EestripeParameter3N

ListofParameters3N

I I

VNIRBand3BData

1 ExtractionfromLOSB

ExtractionfromL03BContainer(n)*2

type*]integer

integer

doubledoublestring

integer

string*4

DescriptionThe information of VNIR

Ban d3N radiometriccorrection table (stored inVNIR Band 3N Swath).(ndct, npara)where,ndct: number of d etectors

npara: number ofparameters

This group con tains theinformation about thequality of Level 1A VNIRBand-3N data.

The information of missingdata.(nmp, ndd, nelm)where,nmp: number of missing

ndd: number of damaged

nelm: number of elementsof

the list of bad pixels*3.This group contains thecoefficients used forradiance conversion, fromthe pixel value of the band-3N image.

used. (4100: fixed)

(3: fixed)

pixels.

detectors.

Inclination V alueOffset ValueConverted UnitW/m2/sr/i_l fixed.This group deno tes theinformation about destripeparameters for Band 3Nimage data.Total number of d estripeparameters.Destripe Parameters(DP1, DP2, DP3,....., DPn)

n= Number ofParameters3NThe information aboutVNIR band 3B of Level-1A.The information about theextraction from Level-0Group-2 PDSs(PDSscontains VNIR band 3N andband 3B strip data) in orderto make VNIR Band 3BData.

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1 RSC (relative scan count)ofntegerSC3B(n)'*the first (n= l) or the last(n=2) scan(2 0). RSC isscan count in eachPDS.

2 SST3B(n)*2 datetime SST (scan start time)of thefirst (n= l) or the last (n=2)scan.

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Table 2.3.1-4 List of Object in Level1A Product Specific M et ad at aV IR )(5/7)

T

3

t

-1

T Group/Object NamePDSid3B(n)*2

ImageDataInformation3B

GeometricCorrection3B

RadiometricCorrection3B

DataQuality3B

NumberofSadPixels3B

typei1string

integer

integer

integer

integer

DescriptionIdentifierof PDS including

the first (n=1) or the last(n=2) scan.The information of VNIRBand 3B image data.

where,npx: Number of pixels per

nln: Number of lines in

bpp: Bytes per pixel

(npx, nln, bPP)

line (5000: fixed)

frame (4600: nominal)

(1 : fixed)The information of VNIRBa nd3 B Swath geolocation

field.(nlpat, nlpct, dlpat, dlpct)where,nlpat: number of lattice

points in along-trackdirection. (1 3:nominal)

nlpct: number of latticepoints in cross-trackdirection.(11 nominal)

dlpat: distance between twoneighbor lattice pointsin along-track direction.(400:nominal)

dlpct: distance betwee n twoneighbor lattice pointsin cross-track direction.(500:nominal)

The information of VNIRBand 3B radiometriccorrection table (stored inVNIR band 3B Swath).(ndct, npara)where,ndct: numbe r of detectors

npara: number ofparameters

This group contains theinformation about thequality of Lev el1A VNIR

used. (5000: fixed)

(3: fixed)

Band-3B data.The information about badpixels.(nmp, ndd, nelm)where,nmp: number of missing

ndd: number of damaged

nelm: numbe r of elementsof

pixels.

detectors.

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Table 2.3.1-4 List of Object in Level 1A Product Specific Metadata(VN1R)(6/7)

1 Incl3B double2 Offset3B double3 ConUnit3B string

7 FirstPixelAddressGroup

L

8

integer

westripeParameter3B

I

1umberofFarameters3B integer

2 ListofParameters3B string*4

TevelOVNIRGlData

1 LODataSetGl

LODataSetGl Container(n)*2

1

datetimeastPacketTimeGl (n)*2

datetimeFirstPacketTimeGl(n)*2

stringDSidGl(n)*2

integeracketCountsGl(n)*2

~

DescriptionThis group contains the

coefficients used forradiance conversion, fromthe pixel value of the band-3B image.Inclination V alueOffset ValueConverted Unit W / m 2 / s r a ixed.This group identifies theaddress of the first availablepixel in each refreshingcycle of VNIR band-3Bimage data.Num ber of refreshing cycle.(nominal= 10 )This identifies the address ofthe first available pixel ineach refreshing cycle ofVNIR band-3B im age data.____

(SC, Ad)where,Sc: Relative scan countAd: AddressThis group deno tes theinformation about destripeparameters for Band 3Bimage data.Total number of destripeparameters.Destripe Parameters(DP1, DP2, DP3,....,DPn)n= Number o f Parameters3BThe information aboutLevel-0 G roup- 1 whichcontains VNIR band 1 and 2data.This group contains theinform ation of LO G roup-Idata set (PDSs).The information about PDSsof Level-0Group- 1.Identifier of this P DSassigned byEDOS.First packet time for thisPDS.Last packet time for thisPDS.Num ber of packets in thisPDS.

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L

L

The identifierof the inputdata type (definedyEDOS).PDS: Prod uction Data SetEDS: Expedited DataSetDDS: Direc t down-link

TEST: Test DataData Set

J

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Table 2.3.1-4 List of Object in Level1A Product S pecific Metadata(VN1R)(7/7)

No. T5

L

6

-1

2

3

4

1

~

4

2

3

1

_ _ _ _ ~ ~

Group/Object NameLODataQualityGl

~ ~

SensorGroupNameGl

NumberofPacketsGl

PercentofMissingPacketsGl

PercentofCorrectedPacketsGl

LevelOVNIRGZData

LODataSetGZ

LODataTypeG2

LODataQualityG2

SensorGroupNameG2

NumberofPacketsG2

PercentofMissingPacketsG2

PercentofCorrectedPacketsG2

type*'

string

integer

double

double

string

datetime

datetime

integer

string

string

integer

double

double

DescriptionThis specifies the number of

input packets used togenerate the data granule,and their quality.Sensor group name:'VNIR1' (fixed)Num ber of packets used togenerate the scene dataofeach group.The percentage of missingpackets of each group.

Unit: %The percentageof packetswith errors corrected byReed Solomon (R-S)

decoding. Unit:%The information aboutLevel-0 Group-2 whichcontains VNIR band 3N and3B data.This group co ntains theinform ation of LO G roup-2data set(PDSs).The information about PDSsof Level-0 Group-2.Identifier of this PD Sassignedby EDOS.First packet time for thisPDS.

Last packet time for thisPDS.Numb er of packets in thisPDS.The identifier of the inputdata type (defined byEDOS).'PDS': Production Data Set'EDS': Expedited Data Set'DDS': Direct down-link

'TEST': Test DataThis specifies the numberofinput packets used to

generate the data granule,md their quality.Sensor group name:'VNIFU' (fixed)Number of packets used togenerate the s cene data of:ach group.The percentage of missingpackets of each grou p.

Unit: %The percentag e of packetswith e rrors corrected byReed Solomon(R-S)

Data Set

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NOTES:(* 1) Object types used in M etadata are

a. datetime: CCSDS A (UTC) Formatb. integerc. double: the floating point value is rounded to the appropriate number

d. string(6 digits after the decimal-poin t character).

(*2)Object whose name followed by(n) has class attribute. It m ay repeat n-times.(*3) The information concerning the list of bad pixels apart from this attribute and is written

to the separated attribute named badpixelinformation. Refer to the section 2.3.1.7,titledBa d Pixel Information.

(*4) SCF Toolkit does not supp ort exponential numbers correspond to the T hird NumericalRepresentation(NR3) in IS 0 6093, then this should be expressed as a quoted strings.Each numberis represented bytw o sequencesof decim al digits called the significant (i.e.,mantissa) and exponent, separated by the ASCII characterE (e.g. VaIue=(+1.23E-l,-4.993+2)).

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2.3.1.5 Product Specific Metadata(SW1R)

(1) Indexes of ObjectsThe O bject list of Product Specific Metadata(SW1R) is shown in Table 2.3.1-5. Product SpecificMetadata(SW 1R) attributes are writtento the HDF file attribute named "pro duc tme tadat a.~".Product Specific Metadata(SW1R) includes product sp ecific attributes, i.e. not associated with DID311.(In Table 2.3.1-5, group names are written inBold characters. A group contains a setof objects that allhave a similar theme.)

Table 2.3.1-5 List of Object in Level 1AProduct Sp ecific Metadata(SW1R) (1/4)

L

LxtractionfromL04

ExtractionfromL04Container(

No.SWIRBand4DataGroup/Object Name

L

J SC4(n)*22 ST4(n)**

TIDSid4(n)*2

ImageDataInformation4

fype''

integer

datetime

~

string

integer

DescriptionThe information aboutSWIR band 4 of Level- 1A.The information about theextraction from Level-0Group-3 PDSs (PDSs

contains SWIR strip data) inorder to make SW IR band 4data.

RSC (relative scan count) of

scan count in each PDS.SST (scan start time) of the

\ I

first (n =l ) or the last (n=2)

Identifier of PDS includingthe first (n=1) or the last

(n=2) scan.The information of SWIRband 4 image data.

where,npx: Numb er of pixels per

line (2048: fixed)nln: Numbe r of lines in

frame (2100:nominal)bpp: By tes per pixel

(1: fixed)

scan.

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Table 2.3.1-5 List of Ob ject in Level1A Product S pecific Metadata(SW1R) (2/4)

7

Group/Object NameGeometricCorrection4

RadiometricCorrection4

DataQuality4

NumberofBadPixels4

~ ~

UnitConversionCoeff4

Incl4Offset42onUnit4

DestripeParameter4

type*integer

integer

integer

doubledoublertring

DescriptionThe information of SWIR

Band-4 Sw ath geolocationfield.(nlpat, nlpct, dlpat, dlpct)where,nlpat: numberof lattice

points in along-trackdirection.(106: nominal)

nlpct: number of latticepoints in cross-trackdirection. (1 04:nominal)

dlpat: distance between twoneighbor lattice points inalong-track direction.(20:nominal)

dlpct: distance between twoneighbor lattice points incross-track direction.(20: nominal)

The informationof SWIRBand-4 radiometriccorrection table (stored inSWIR band 4 Swath).(ndct, npara)where,ndct: number of detectors

npara: number ofparameters

(3: fixed)This group contains theinformation about thequality of Level1A SWIRBand-4 data.The information about badpixels.(nmp, ndd, nelm)where,nmp: number of missing

ndd: number of damaged

nelm: number of elementsof

the list of badpixel^'^.This group con tains thecoefficients used forradiance conversion, fromthe pixel value of the band-4image.

used. (2048: fixed)

pixels.

detectors.

Inclination ValueOffset ValueClonverted Unit.W l m 2 / s r u fixed.rhis group d enotes thenformation about destripe

. , - 1 .

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1 Total numberof destripeintegerumberofParameters4parameters.

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Table 2.3.1-5 List of Object in Level1A Product Spe cific Metadata(SW1R ) (3/4)

2 - .7.23 - .7.24 - .7.25 - .7.26 - .7.27

-8

1

11

2-

-3

-4

1

Group/Object NameDestripe Parameterstring*4istofParameters4Descriptionype*

(DP1, DP2, DP3.....,DPn)n= Number of Parameters4For next SWIR Ban dSD ata, repeat the above items(1 through 1.7.2).For next SW IRB and 6D ata, repeat the above items(1 through 1 .7.2).For next SW IRBan d7Da ta, repeat the above items(1 through 1.7.2).For next SWIR Ban dSD ata, repeat the above items(1 through 1.7.2).For next SW IRB and gD ata, repeat the above items(1 through 1.7.2).LevelOSWIRData The information about

LODataSet

LastPacketTime(n)*2

PacketCounts(n)*2

LODataType

LODataQuality

SensorGroupName

NumberofPackets

PercentofMissingPackets

PercentofCorrectedPackets

SWIRRegistrationQuality

ProcessingFlag

string

datetime

datetime

integer

string

string

integer

double

double

integer

Level-0 Group-3 whichcontains SWfR data.This group contains theinformation of LO SWIRdata set (PDSs).The information about PDSsof Level-0 Group-3.Identifier of this PDSassigned by EDOS.First packet time for thisPDS.Last packet time for thisPDS.Number of packets in thisPDS.The identifier of the inputdata type (defined byEDOS).PDS: Production Data SetEDS: Expedited Data Set

DDS: Direct down-link

TEST: Test DataThis specifies the numberofinput packets used togenerate the data granule,and their quality.Sensor group nam e:SWIR (fixed)Number o f packets used togenerate the scene data ofeach group.The percentage of missingpackets of each group.

Unit:%The percentageof packetswith errors corrected byReed Solomon (R-S)decoding. Unit:%The registration informationof SWIR based on VNIR.0: no output, because

1 outputis the result

2: output is extracted from

Data Set

processing is impossible.

computed.

registration file.

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Table 2.3.1-5 List of O bject in Level 1A Product Specific Metadata(SW1R)(4/4)

2

6

GroudObiect NameNumberofMeasurements

MeasurementPointNumber

Averageoffset

StandardDeviationOffset

Threshold

ParallaxCorrectionQuality

PctImageMatch

AvgCorrelCoef

Cthld

typeinteger

integer

double

double

double

integer

double

double

DescriptionThe number of

measurementsThe number ofmeasurement points.Average offset value.(LAOset, PAOset)where,LAO set: average offset in

along track direction.PAOset: average offset in

cross track direction.Standard deviation offsetvalue.(LSDOset, PSDOset)where,

LSDOset:SD offset inalongtrack direction.

PSDO set: SD offset in crosstrack direction.

Threshold value.(CThld, LOThld, POThld,VOThld)where,CThld: C orrection thresholdLOTh ld: offset threshold in

along track d irection.POThld: offset threshold in

cross track direction.VOT hld: Vector offset

thresholdThe information of SWIRparallax correction.The percentage of imagematching used in the SW IRparallax correctionprocessing. Unit: %The Average CorrelationCoefficient.The C orrelation Thresholdvalue.

NOTES:

(* 1) Object types used in Metadata area. datetime: CCSDS A (UTC ) Formatb. integerc. double: the floating point value is rounded to the appropriate number

d. string(6 digits after the decima l-point character).

(*2) Object whose name followed by (n) has class attribute. It may repeat n-times.(*3) The information concerning the list of bad pixels apart from this attribute and is written

to the separated attribute named badpixelinformation. Refer to the section 2.3.1.7,titledBad Pixel Information.

(*4) SCF Toolkit does not support exponential numbers correspond to the Third Num ericalRepresentation (NR3) inIS0 6093, then this should be expressed as a quoted strings.Each num ber is represented bytwo sequen ces of decim al digits called the significant (i.e.,mont;coo\ A n vn r \ l . an t -nnoro tnA h T 7 h o A CPTT o h o r o n t a r li I n n \ l n l m m n ~ l 6 6 & 1 9 1 P - 1 ) )

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2.3.1.6 Product Specific Metadata(T1R)

(1) Indexes of ObjectsThe Object list of Product Specific Metadata(T1R) is shown in Table 2.3.1-6. Prod uct Speci ficMetadata(T1R) attributes are written to the HDF file attribute named pr 0du ctm etad ata.t .Product SpecificMetadata(T1R) includes product specific attributes, i.e. not assoc iated withID311.(In Table 2.3.1-6, group namesare written in Bold characters. A group contains a et of objects that allhave a similar theme.)

Table 2.3.1-6 List of Object in Level 1A Productpecific Metadata(T1R) (1/4)

No. I GroudO biect Name1 TIRBandlOData

1 ExtractionfromLOlO

ExtractionfromL04Container(

< ST10(n)j23 PDSid10(n)*2

2 ImageDataInformationlO

typer1

integer

datetime

string

integer

integer

DescriptionThe information about TIRband 10 of Level-1A .The inform ation about theextraction from Level-0Group-4 PDSs PDSs

contains TIR trip data) inorder to make TIR Band10data.

RSC (relative scan cou nt) ofthe first (n= l or the last(n=2) scand ). RSC isscan count in each PDS.SST (scan tart time) of thefirst (n=I) or the last (n=2)

Identifierof PDS includingthe first (n=I) or the last

(n=2) scan.The information f TIRband 10 image data.

where,npx: numb er of pixels per

nln: number of line in

bpp: by tes per pixel

The information f TIRband 10 Swath geolocationfield.

(nlpat, nlpct, dlpat, dlpct)where,nlpat: numb er of lattice

points in along-trackdirection. (11 nominal)

nlpct: num ber of latticepoin ts in cross-trackdirection. (11: nominal)

dlpat: distance between twoneighbor lattice pointsin along-track direction.(70: nominal)

dlpct: distance between two

scan.

(npx, nln, bPP)

line (700: fixed)

frame(700: nominal)

(2: fixed)

. . . . .

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Tab le 2.3.1-6 List of Object in L evelA Product S pecif ic Metadata(T1R) (2/4)

5

!7

Groud Obiect NameRadiometricCorrectionlO

type*linteger

DescriptionThe information f TIR

Band- 10 radiometriccorrection table (stored inTIR band10 Swath).(ndct, npara)where,ndct: number of detectors

npara: number ofDarameters

used. (IO: fixed)

(3: fixed)DataQualitylO This group contains the

information about the

~

NumberofBadPixelslO

UnitConversionCoefflO

Incl10Offset10ConUnit10

integer

doubledoublestring

data.

The information about adpixels.(nmp, ndd, nelm)where,nmp: number of m issing

ndd number of damaged

nelm: number of lementsof

the list of bad pixels*3.This group contains thecoefficients used forradiance conversion, fromthe pixel value f the band-10 image.Inclination ValueOffset ValueConverted-t

pixels.

detectors.

W / m 2 / s r u ixed.

DestripeParameterlO This group denotes theinformation about destripeparameters for Band10image data.

parameters.

@ PI, DP2, DP3,....,DPn)

n= Num ber of Parameters 0

Num berofParameters 10

Destripe Parameterstring*4istofParameterslO

Total numb er f destripenteger

For next TIR Ban dllD ata, repeat theabove items (1 through 1 .7.2).For next TIRBandlZData, repeat the above items1 through 1.7.2).For next TIRBa ndlJ Da ta, repeat the above items(1 through 1.7.2).For next TIR Ban dl4D ata, repeat the above items(1 through 1.7.2).LevelOTIRData The information about

Level-0 Group-4whichcontains TIR ata.

LODataSet This group contains theinformation of O TIRGroup-10 data et (PDSs).

of Level-0 Grouv-4 data.LODataSetContainer(n)** The information about DSs

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FirstPacketTime(n)'2 First packet time or thisatetimePDS.

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Table 2.3.1-6List of Object in Level 1AProduct Specific Metadata(T1R)(3/4)

2

3

Group/Object NameLast packet time for thisatetimeasPacketTime(n)*2Descriptionypei1

PDS.PacketCounts(n)*2

LODataType

integer

string

Number o f packets in thisPDS.The identifier of the invutdata type (defined byEDOS).PDS: Productio n Data SetEDS: Expedited Data SetDDS: Direct down-link

Data SetI TEST: Test Data

LODataQuality IThis specifies the numb er ofinput packets used togenerate the data granule,

and their quality.SensorGroupName Sensor group name:tring1TIR (Exed)

NumberoPackets I integer I Number of packets used to

PercentofMissingPackets

PercentofCorrectedPackets

TIRRegistrationQuality

ProcessingFlag

NumberofMeasurements

MeasurementPointNumber

Averageoffset

double

double

integer

integer

integer

double

generate the scene data of

The percentage of missingpackets of each group.

Unit:%The percentage of packetswith errors corrected byReed Solomon (R-S)decoding. Unit:%The registration information

of TIR based onVNIR.0: no output, because

1: output is the result

2: output is extracted from

4: output obtained by other

The number ofmeasurementsThe number ofmeasurement points.Average offset value.

(LAOset, PAOset)where,LAOset: average offset in

along track direction.PAOset: average offset in

cross track direction.

eachgroup.

processing is impossible.

computed.

registration file.

method.

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Table2.3.1-6List of Ob ject in Lev el1A Product Specific Metadata(T1R)(4/4)

Group/O bject Name5 StandardDeviationOffset

1

1

type*double

double:IRSTCInfoContainer(n)

I

ShortTermCalInfolO(n)*

I I I

2 - 5.2 I For ShortTermCalInfoll-ShortTermCal

DescriptionStandard deviation offset

value.(LSD Oset, PSDOset)where,LSDOset: Linedirection SD

offset in alongtrack direction.

PSDOset: PixeldirectionSD offset in cross

track direction.Thresho ld value.(CThld, LOT hld, POThld,VOThld)where,CThld: Correction threshold

LOThld: offset threshold inPOT hld offset threshold in

VOThld: Vectoroffset

along trackdirection

cross trackdirection

thresholdThis denotes the Short-TernCalibration (STC)Information of TIRdata.n = 1: me-STCn = 2: post-STCThe Sho rt-Tern Cal. Infor-mation of TIR Band0.Black body image data

mean value for each TIRBand 10s detector.(mn~, nz, - IO>Black body image datastandard deviation alue foreach TIR Band0sdetector.( d l , Sdz,- 4 o )

1fo14 repeat the aboveitems.

6 The Black BodyBlackBodyInfo(n)*LTemperature information.

temperature group.

(bbtml, bbtmz,- bbtms)each of five temperature

1 Mean value or each of fiveoublelackBodyTempMean(n)*

2 Standard deviation alue foroublelackBodyTempStd(n) L

L group.(bbtsdl, bbtsdz,- bbtsd,)ChopperInfo(n)

Mean value for each ofhopperTempMean(n)*

The Chopper Temperatuerinformation.

three temperature group.(Ctmnl, ctmnz, ctmn3)

ChopperTempStd(n) Standard deviation alue foreach of hree temperaturegroup.

I . .~

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NOTES:(*1) Object types used in Metadata are

a. datetime: CCSDS A (UTC) Formatb. integerc. double: the floating point value is rounded to the appropriate numb er

d. string(6 digits after the decimal-point character).

(*2) Object whose name follow ed by (n) has classattribute. It may repeat n-times.(*3) The inform ation concerning the list of bad pixels a part from this attribute and is written

to the separated attribute named bad pixelinformation. Refer to the section 2.3.1.7,titled Ba d Pixel Information.

(*4) SCF Toolkit does not support exponential numbers correspon d to the Third NumericalRepresentation (NR3) in I S 0 6093, then this should be expressed as a quoted strings.Each num ber is represented bytwo sequences of decim al digits called the significant (i.e.,mantissa) and exponent, separated by the ASC II characterE (e.g. Value=(+1.23E-1,-4.993+2)).

(*5) Item 8.1.1 through 8.7.2 doNO T exist for the data type of the sourc e data product thatstores EDS (Refer to the item 8 in the table 2.3.1-2).

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2.3.1.7 Bad P ixel Information

(1) Indexes of O bjectsThe Object list of Bad Pixel Information is shown in Table 2.3.1-7. Bad Pixel Information attributesare written to the HD F file attribute namedbadpixelinformation.Bad P ixel Information includes product specific attributes, i.e. not associated with D ID3 11.(In Table 2.3.1-7, group names are written inBold characters. A group con tains a set of objects that allhave a sim ilar theme.)Bad Pixel information is set for every band individually, and the mandatory attributes for their objectsare flagged as FALSE. When the band image has no bad pixel, the corresponding bad pixelinformatio n is not set in this attribute. So, in case that all bands ha ve no bad pixel, this specificattribute will not appear in the HDF-EOS attribute.

Table 2.3.1-7 List of Object in Bad Pixel Information (1/2)

No. IGroup/Object Name1

r

BandlInformation

I1 NumberofElementl

2 ListofBadPixelsl

ListofBadPixelslContainer(n)*2

1 -

1 I DirectionofBadPixell(n)*

7CauseofSadPixell(n)*2

type*]

integer

DescriptionThis group contains the

information about the badpixels with respect to theLevel 1A VNIR Band-1image.The number o f elements ofthe list of bad pixelsThis group con tains the listof bad pixels.

segment.C= cross-track

integer

string

1 A= along-track

Location information foreach bad pixel element.(LPNo, FPL, LPL)where,LPNo: The line number in

cross-track segm ent(or the pixel numberin along-tracksegment) includingBPS.

FPL: First pixel (or line)number of BPS.

LPL: Last pixel (or line)number of BPS.

The cause of bad data:My:Data

1D: Damaged Detectoru

1-3 IFor nextBandZInformation, repeat the above items (1 through 1.2.3).

L

~

3

6 - .2.3For nextBand4Information, repeat the above items (1 through 1.2.3).-5.2.3 For nextBand3BInformation, repeat the above items (1 through 1.2.3).-4.2.3For nextBand3NInformation7 epeat the above items (1 through 1.2.3).

7 - .2.3 For nextBand6Information, repeat the above items (1 through 1.22For nextBandSInformation, repeat the above items (1 through 1.2.3).

~

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Table 2.3.1-7 L ist of O bject in Bad Pixel Information (2/2)

NOTES:(*1) Object types used in Metadata are

a. datetime:CCSDSA (UTC)Formatb. integerc. double: the floating point value is rounded to the appropriate number

d. string(6 digits after the decimal-point character).

(*2) Object whose name followed by (n) has class attribute. It may repeat n-times.(*3) Just in case of SWIR, Me for even pixel and Mo for odd pixel.

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2.3.2 Cloud Coverage Table

(1) D escriptionCloud coverage table is available for Level 1A Product corresponding to each ASTE R O bservation(OBS) modes.

(2) Characteristicsa) Data model: SD S (2 Dimensional Array)b) Object Name:Cloud-Coverage-Tablec) Format: Refer to Table 2.3.2-1d) Con tents: each element is 1 byte data, indicatesclear (= 0) or cloudy (= 1) for the rectangu lar area

(the definition of those area is shown in Note 1 and No te ~2 elow).

Table 2.3.2-1 S ize of Cloud Co verage Data

Reference CoordinatesI Dimension Size I Variable TypeSWIR UINTS

(* 1) In case that the strip observation mode is VST+T or ST +T and onlyTIR data is included in the p roduct(i.e., SensorShortName contains onlyASTER-TIR and ASTER ObservationMode identifies VST or ST mod e),the reference coordinate for the cloud coverage table will be SWIR (notTIR). See the section 1.5, titledStrip ObservationMode.

(*2) Cloud coverage table is entered in the order with [lin e][pixel]. Line size isdepending on a p rocessing scene. (e.g., n: nominal value 10 5 in case ofSWIR)

Note 1 Reference Coordinates will change depending on condition of observation.a) In no minal case, the lattice coordinates of SW IR Geometric Correction Table (GCT) is used

b) If SW IR data is not available, the lattice coordinate of VNIR GC T will be used as center

c) If both SWIR and VNIR data are not available, the lattice coordinateof TIR GC T will be

as centerof evaluation rectangle.

instead.

used.

Note 2: Evaluation area size is shown as follows.

Reference CoordinateI SWIR VNIR TIREvaluation area size I 2 0 u o p 4 l L L h l PL u 6 P

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2.3.3 Ancillary Data

(1) DescriptionAncillary Data inc ludes the satellite's orbitlattitude data, and their time tags. Since ancillary dataappended to onboard instrument data are updated once per major cycle time (1.024 sec), in order tomatch with the scene observation time, an extra number of ancillary data will be extracted andprovided. To ensure the conformity with instrument data, the time data which represents the ancillarydata updating timeOJTC) is assigned to the leading ancillary data, and called Time Tag. This is used ascontrol data for extracted Image Data.

(2 ) CharacteristicsAncillary Data Group contains a series of Ancillary Data Records through the use of V group API.

vgroup name: Ancillary-Dataclass: Ancillary

Each record of Ancillary Data has following characteristics.a) Data model: Vdatab) Object Name:Ancillary-Datac) C lass Name: A nci-Rec0rd.n( n : Record count number-- 12- 9 records)d) Format and con tents: Table 2.3.3-1 shows the format and the contents of

Ancillary Data. Some Ancillary Data contains multiple entries per field. Orderthat is the number of components in a field is also show n in Table 2.3.3-1.

Table 2.3.3-1 Format of An cillary Data (1/2)

Secondary-Header 8

Flag-Byte 1

Time-Conversion 3

Position 3

A U : L . . n - I .

Variable SizeUINT 16UINT8

UINT8

UINT8

INT8

INT32

INT32

INT16

T l r T - r . 1 I

DescriptionTime Tag (UT C): Spacecraft Time FormatCCSDS Primary Packet Header for downlink,used for ground routing and processing.This field is part of the secondary header of the

packet for downlink.Bi t 0: Secondary Header ID Flag (always adata zero)Bit 1-63: Time Stamp-- Epoch of the data inthe ancillary data m essage. Sp acecraft clocktime in CCSDS Day-Segmented Format. Thecode epoch is January 1 ,1958 .Flag Byte-- Flags for ground data processingcontrol. First (most significant) bit is the"quick look" bit. Other bits are reserved andwill contain data zero. This field is part of thesecondary header of the packet for dow nlink.Time Conversion-- Estimated differencebetween UTC and the Spacecraft Clock. This

may be add ed to the Spacecraft Clock time toderive UTC time.Spacecraft Position (x, y,z) -- Estimatedposition of the spacecraft, expressedin EarthCentered Inertial frame (mean Eq uator andEquinox of 52000).Spacecraft Velocity (x, y, z)-- Estimatedvelocity of the spacecraft, expressed in E arthCentered Inertial frame (mean Equator andEquinox of J2000).Attitude Angle (Roll, Pitch, Yaw)-- Th eestimated attitudeof the spacecraft, expressed

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Table 2.3.3-1 Form at of Ancillary D ata (212)

Field NameMagnetic-Coil

SolarArray

Solar-Position

Moon-Position

Order Descriptionariable Size3

Moon P osition (x, y,z) --Components of theNT8

Solar Position(x, y, z) -- Components of unitNT8

Solar Array Current-- Current flowing fromINT8

Magnetic Coil Current(x, y, z ) -- CurrentsNT8

flowing in each of the magn etic torque coilsused for Sp acecrafl momentum unloading.

the Spacec raft solar array.

vector, expressed in the Spacecraft Referenceframe, pointing in the direction of the Sun .

unit vector, expressed in the SpacecraftReference frame, pointing in the direction ofthe Moon.

Note 1: Resolution and Range are shown as follows.

Ancillary Data I Resolution RangePrimarv Header N/A N/ASecondary Header I NIA N/A

I

Time Stamp 1 u 1958-2047Flag Byte I N/A/A

Attitude Rate 0.5 arcsedsec u 1 0 2 4 arcsedsec

Solar PositionMoon Position

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2.3.4 VNIR G roup

2.3.4.1 Overview

VNIR Group containsan SDS and a series of Swath Objects through the use of the VgroupAPI.Vgroup name that establishes access to a Vgroup is as follows.

vgroup name: VNIRclass: 1A

2.3.4.2 VN IR Band 1 Swath

(1) StructureA single swath contains any num ber of Tables and Multidimensional Arrays. There is however onetype of information that is special: geolocation information. In a swath, geolocation informationisstored as a series of arrays. We require that every swath contain some geolocation component.The da ta itself is stored in multidimen sional arrays in the swath. The on ly limitation is that the firstdimension is the Track dimension. Each Band is stored as separate Swath structure, one pergeolocation object.Consider Figure 2.3.4-1, which is represent of a swath consisting of a com bination of 2D and 3D dataarrays, a series of 2D geolocation arrays, a seriesof data tables, and a single 1D geolocation tables.

Figure 2.3.4-1 Con ceptual Viewof Exampleof Swath

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(2) CharacteristicsTable 2.3.4-1 shows the List of data items in VNIR Band 1 Swath.

a) Data model: Swath

b) Object Name:VNIR-Band1c) Format: Table 2.3.4-1 shows the contents of Swath Object. Table 2.3.4-2 show s the format of them.

Table 2.3.4-1 Listof data items in Level 1A VNIR Band 1 Swath

No.

deg.eolocation Arrayongitude.

deg.eolocation Arrayatitude.Unitypeield Name

3. lineeolocation TableceneLineNumber4. Latticepoint

mata TableatellitePosition.

arcsecD D ata Arrayightvector

.

pixel, lineD Data Array

7. SatelliteVelocity Data Table mlsec8. AttitudeAngle arcsecata Table

9.

10.

arcsectsecata TablettitudeRate

NIAata TablebservationTime

Commentsgeocentric latitude: decimal degree on range

geocentric longitude: decimal degreeon range

coordinates basedon the strip imagelattice point coordinates (pixel, line) basedonimage dataline of sight vector (roll, pitch, yaw) in orbitalreference framesatellite position vector(x , y, z) at ECIsatellite velocity vector (x, y,z) at ECIsatellite attitude angle (roll, pitch, yaw)inorbital reference framesatellite attitude angular v elocity (roll, pitch,yaw)observation time of this lattice point (UTC)

[-90.0,90.0]

r-180.0, 180.0)

Format: Spacecraft Time FormatLevel 1A spectral band image dataradiom etric correction coefficients of equation:

L = A J J V I G ~ + D ~The order of the last dimension of these

coefficients is @v, Av, Gv).The orderof the first dimensio n corresponds tothe detector number.

~ ~ ~

Table 2.3.4-2 Format of data items in VNIR Band 1 Swath

n: revised to accommodate a processing scene 12: nominal).

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2.3.4.3 VNIR Band 2 Swath

(1) StructureRefer to the section 2.3.4.2, titledW I RBand I Swath.

(2) CharacteristicsThe contents of VNIR Band 2 Swathare similarto the items in Tab