上海天文台Shanghai Astronomical Observatory

Recent VLBI Activities in China

Zhi-Qiang Shen (Shanghai Astronomical Observatory)

2009 East Asia VLBI Workshop18-20 March 2009, LG Convention Hall of International Education

Building at the Ewha Woman's University, Seoul, Republic of Korea

上海天文台Shanghai Astronomical Observatory

2460

2158

3249 111

42476

1920

CVN (4 stations+ soft-/hard-ware correlator)

1993(25m)

1987(25m)

2006(50m)

2006(40m)

2006(correlator)

上海天文台Shanghai Astronomical Observatory

Diameter: 25m

Band: L, S/X, C, K

Recording system: MK2, S2, MK3, MK4, MK5A

CVN—Shanghai station (1987)

上海天文台Shanghai Astronomical ObservatoryCVN—Urumqi station

(1993)

Diameter:25m

Band: P, L, S/X, C, K ， (also 30 and 49 cm)

Recording system: MK2, MK3, MK4, MK5A, K-4 ， K-5

上海天文台Shanghai Astronomical ObservatoryCVN—Kunming station

(2006)Diameter; 40m (central 25m:full panel; 25 - 40m: mesh)Band : S/XRecording system: MK5A

上海天文台Shanghai Astronomical Observatory

CVN—Beijing station (2006)

Diameter:50m (central 30m: full panel; 30-50 m: mesh)Band: S/XRecording system: MK5A

上海天文台Shanghai Astronomical ObservatoryMobile VLBI—Yunnan

(2000) A Mobile VLBI System with 3m antenna was constructed by

ShAO for the Xi’an Surveying and Mapping Institute in 2000 which is located in the Yunnan Astronomical Observatory.

S/XS/X

上海天文台Shanghai Astronomical ObservatoryCVN -VLBI data processing

centerHardware correlator (5 stations)Software correlator (4 stations) Output data: CE-1 format FITS format (available?) Software for CE-1 data processing (near real time, in 5 min.)

上海天文台Shanghai Astronomical Observatory

CVN - Application to CE-1

16hX248hX124hX3

6d

12h

3.5h

2h

调相轨道段

地月转移轨道段月球捕获轨道段

环月轨道段

Orbit determination: USB+VLBIVLBI tracking distance > 20000km elevation > 5 degree output data: delay, delay rate, angular position output delay time: < 5 minutes

上海天文台Shanghai Astronomical Observatory

VLBI CorrlatorVLBI Corrlator

Post-data processingPost-data processing

Angular position calculationsAngular position calculations

O.D.O.D.

delay Delay rate

VLBI Center

Control center in BeijingControl center in Beijing<5 minutes later

VLBI center in ShanghaiVLBI center in Shanghai

Dec.R.A.

上海天文台Shanghai Astronomical Observatory

Chang’E National project

回 :returning回 :returning

绕 :Orbiting

CE-1:Oct 2007 (482d/494d)CE-2: ~2010

绕 :Orbiting

CE-1:Oct 2007 (482d/494d)CE-2: ~2010

落 :LandingCE-3:~2012落 :LandingCE-3:~2012

上海天文台Shanghai Astronomical Observatory

Ending of CE-1: March 1, 2009

上海天文台Shanghai Astronomical Observatory

e-VLBI28 August 2007: Shanghai –Australia & Europe (256Mbps) 17 June 2008: Shanghai –Australia & Japan (512Mbps)6 January 2009: Shanghai-Urumqi (256Mbps)15-16 January 2009: IYA marathon obs. (Asia, Australia, Europe, America)

上海天文台Shanghai Astronomical ObservatoryFAST- Five-hundred-meter

Aperture Spherical TelescopeUnique Karst depression as the site

Active main reflector

Cable - parallel robot feed support

Approved in Nov 2005;Start full construction in 2009;9 bands from 70MHz to 3 GHz(Expected) 2014

上海天文台Shanghai Astronomical Observatory

New 65m telescope in Shanghai

Specs: 8 bands (1.4–43 GHz); active surface; operational at S/X bands before the end of 2012… (refer to the talk by Bin Li for details)

上海天文台Shanghai Astronomical Observatory

CVN by 2014

Thanks!