5. GBAS

1.

GNSS

ICAOSARPs

GPS

GBAS Ground- Based Augmentation System 1

GPS

CAT-IIIGBAS CAT-I SARPs

2001 CAT-IIISARPs

GBAS

GBAS ICAO

VHF 13GBAS

RFSignal Quality

Monitor; SQM

GBAS

20CAT-I

GBAS

H21GBAS

GBAS

2. GBAS GBAS 1GPS 3 4 GPS

VHF

1. GBAS

電子航法研究所研究発表会（第 10 回平成 22 年 6 月）

5. GBAS プロトタイプ開発の概要と電離圏モニタ方式

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Lateral Protection Level; LPLVertical Protection

Level; VPL Lateral Alert Limit; LAL

Vertical Alert Limit; VAL

[1,2] GBASGBAS

0.81m 95%CAT-I

4m [3] GBAS

3

Time to Alert TTACAT-I

SARPs LPL VPL DH Decision Height 40m 10m TTA

6 31

1-2 10 7

SARPsCAT-I 15

1-8 10-6

99 99.999%

3

3. GBAS

SAE Society of

Automotive Engineers, Inc.

[4, 5]

Functional Hazard Assessment; FHA

Preliminary System Safety Assessment; PSSA System Safety Assessment; SSA

PSSA SSAFault Tree Analysis; FTA

GBAS

IMT Integrity Monitor Testbed[6]GBAS

GBAS

H20

CAT-I GBAS

GBAS

3 1

GBAS

4. GBAS

RF

GPS

ICAO GPS3SARPs

TTA

GPS

[7]

5.

GBAS

2

GPS [8] GPS

SED Storm Enhanced Density

412 mm/km; 200311 20 [9] SARPs

GBAS

CCD Code-Carrier Divergence 2

Geometry Screening[9]

GBAS

28.8m [10]

10 15

[11]

2. GBAS

電子航法研究所研究発表会（第 10 回平成 22 年 6 月）

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4. GBAS

RF

GPS

ICAO GPS3SARPs

TTA

GPS

[7]

5.

GBAS

2

GPS [8] GPS

SED Storm Enhanced Density

412 mm/km; 200311 20 [9] SARPs

GBAS

CCD Code-Carrier Divergence 2

Geometry Screening[9]

GBAS

28.8m [10]

10 15

[11]

2. GBAS

電子航法研究所研究発表会（第 10 回平成 22 年 6 月）

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GPS

GPSGEONET

SED

CCD

VAL 10m

2DH

Ionospheric Field Monitor; IFM

SARPs 6.

H20GBAS CAT-I H21

IFM

[1] ICAO SARPs, ANNEX 10, 2006. [2] RTCA SC-159, RTCA/DO-246D, 2008. [3]

2006

[4] “Certification considerations for highly-integrated or complex aircraft systems”, SAE international, Warrendale, PA, Nov. 1996. [5] “Guidlines and methods for conducting the safety assessment process on civil airborne systems and equipment”, SAE international, Warrendale, PA, Dec. 1996. [6] Gang Xie, “Optimal on-airport monitoring of the integrity of GPS-based landing systems”, Ph.D. dissertation, Stanford University, Mar. 2004. [7]

GPS

No.123 2010 1 [8] J. Christie et al., “Analytical and Experimental Observations of Ionospheric and Tropospheric Decorrelation Effect for Differential Satellite Navigation during Precision Approach”, proc. of ION GPS-98, pp 739-747, 1998. [9] S. Ramakrishnan et al., “Targeted Ephemeris Decorrelation Parameter Inflation for Improved LAAS Availability during Severe Ionosphere Anomalies”, ION NTM 2008, Jan. 2008. [10] C. Shively et al., “Safety Concepts For Mitigation of Ionospheric Anomaly Errors in GBAS”, proc. of ION NTM 2008, pp.367-381, Jan. 2008. [11]

32000.

電子航法研究所研究発表会（第 10 回平成 22 年 6 月）

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