Author Topic: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 9, 2012  (Read 29492 times)

Offline input~2

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« Last Edit: 05/10/2012 11:32 am by input~2 »

Offline Phillip Clark

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Re: Ziyuan-3 TSLC CZ-4B launch December 2011
« Reply #1 on: 08/08/2011 04:26 pm »
I wonder whether Ziyuan-3 will be as "civil" as was Ziyuan-2 (= Jianbing-3, photoreconnaissance)?
I've always been crazy but it's kept me from going insane - WJ.

Offline Satori

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Re: Ziyuan-3 TSLC CZ-4B launch December 2011
« Reply #2 on: 08/08/2011 04:31 pm »
I wonder whether Ziyuan-3 will be as "civil" as was Ziyuan-2 (= Jianbing-3, photoreconnaissance)?

Good question! Interesting to note that ZY-1 (2C) is schedule also for launch at the end of 2011.

Offline Phillip Clark

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Re: Ziyuan-3 TSLC CZ-4B launch December 2011
« Reply #3 on: 08/08/2011 04:55 pm »
I seem to remember that at one point Ziyuan-1 and Ziyuan-3 were going to be CBERS missions, while Ziyuan-2 and Ziyuan-4 were going to be purely domestic Chinese (Jianbing) missions.

The Ziyuan-3 CBERS link seems to have disappeared and so maybe what was Ziyuan-4 is now Ziyuan-3?

I always thought that it was strange that the Zuiyan-2 satellites were not replaced to maintain a 2 or 3 satellite constellation - the programme apparently stopped after the third launch.   Of course, some of the work could have been taken over within the Yaogan/Jianbing programme.
I've always been crazy but it's kept me from going insane - WJ.

Offline limen4

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Re: Ziyuan-3 TSLC CZ-4B launch December 2011
« Reply #4 on: 08/09/2011 08:57 pm »
The ZiYuan program seems to be a melting pot of very different civil and military earth observation programs. My point of view:
ZY-1: Resources; Operated jointly by Center for Earth Operation and Digital Earth (CEODE) and INPE
ZY-2: Aerial surveillance (YG-5 was very likely the fourth satellite within the constellation); Operated by PLA
ZY-3: Stereo Mapping ; Operated by State Bureau of Surveying and Mapping
TH-1: Stereo Mapping (the military counterpart of ZY-3); Operated by PLA
Images of TH-1 are very rare (in contrast to ZY-3). I found one at a philatelic envelope. See the similarity to ZY-3
« Last Edit: 02/14/2012 08:09 am by limen4 »

Offline input~2

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« Last Edit: 12/05/2011 04:10 pm by input~2 »

Offline input~2

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Re: Ziyuan-3 TSLC CZ-4B launch mid-January 2012
« Reply #6 on: 12/06/2011 09:02 am »
Planned orbital data from a 2-year old article:
http://sasmac.sbsm.gov.cn/article/wxzh/200912/20091200059258.shtml

Nominal orbit:
505.984 x 505.984 km @ 97.421°
LTDN: 10:30 am

Offline input~2

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Re: Ziyuan-3 TSLC CZ-4B launch mid-January 2012
« Reply #7 on: 12/10/2011 07:18 pm »
According to Luxspace, Vesselsat-2 will possibly piggy-back with Ziyuan-3
Quote
“This contract also includes the launch of a second satellite which  should be operational mid-January 2012 and will be installed on a  Chinese launcher”.
source

Offline Satori

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Offline input~2

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #9 on: 12/27/2011 07:41 pm »
Target launch date for Vesselsat-2 (with Ziyuan-3) is set for January 10.
(source)

Offline Salo

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #10 on: 12/27/2011 08:25 pm »
Orbcomm said Dec. 27 that the VesselSat2 maritime-tracking satellite it will use to supplement its planned constellation of Automatic Identification System (AIS) satellites has been delivered to China in preparation for a Jan. 12 launch.

http://www.spacenews.com/satellite_telecom/122711-maritime-microsat-delivered-china-for-january-launch.html

Offline input~2

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #11 on: 12/27/2011 08:54 pm »
Orbcomm said Dec. 27 that the VesselSat2 maritime-tracking satellite it will use to supplement its planned constellation of Automatic Identification System (AIS) satellites has been delivered to China in preparation for a Jan. 12 launch.

http://www.spacenews.com/satellite_telecom/122711-maritime-microsat-delivered-china-for-january-launch.html
This looks like a misprint from Space News; the original Orbcomm release said January 10
« Last Edit: 12/27/2011 08:56 pm by input~2 »

Offline input~2

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #12 on: 12/28/2011 04:17 pm »
Orbcomm said Dec. 27 that the VesselSat2 maritime-tracking satellite it will use to supplement its planned constellation of Automatic Identification System (AIS) satellites has been delivered to China in preparation for a Jan. 12 launch.

http://www.spacenews.com/satellite_telecom/122711-maritime-microsat-delivered-china-for-january-launch.html
This looks like a misprint from Space News; the original Orbcomm release said January 10

Space News have confirmed to me that it was indeed a misprint; they now have corrected the date :)
Quote
Orbcomm said Dec. 27 that the VesselSat2 maritime-tracking satellite it  will use to supplement its planned constellation of Automatic  Identification System (AIS) satellites has been delivered to China in  preparation for a Jan. 10 launch.
http://www.spacenews.com/satellite_telecom/122711-maritime-microsat-delivered-china-for-january-launch.html
« Last Edit: 12/28/2011 04:36 pm by input~2 »

Offline input~2

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #13 on: 01/01/2012 03:27 pm »
This CZ-4B launch from TSLC will be the first Chinese launch in 2012.
(source)
« Last Edit: 01/01/2012 06:25 pm by input~2 »

Offline Galactic Penguin SST

Astronomy & spaceflight geek penguin. In a relationship w/ Space Shuttle Discovery. Current Priority: Chasing the Chinese Spaceflight Wonder Egg & A Certain Chinese Mars Rover

Offline Phillip Clark

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #15 on: 01/08/2012 12:50 pm »
China ready to bgin a busy space year and catch up after delays and postponements from last year.
I've always been crazy but it's kept me from going insane - WJ.

Offline Satori

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 9, 2012
« Reply #16 on: 01/08/2012 12:54 pm »
Latest news points to launch in tomorrow (probably between 03:00 and 03:30 UTC, since the target Sun-synchronous orbit's local time at the descending node is given as 10:30).

Interesting. This gives credit to the LuxSpace information regarding a January 9 launch date or do you think they have anticipated the launch?

Offline Satori

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #17 on: 01/08/2012 12:56 pm »
Any NOTAM's available?

Offline Galactic Penguin SST

Some parameters of the ZY-3 civil high-resolution stereoscopic mapping satellite:

Usage: To satisfy the needs for constructing a database for production of 1:50000 and larger scale maps and provide data for resource mapping, environmental surveying, disaster monitoring, city planning and national security needs.

Platform: Modified ZY-2 satellite platform

Payloads:
1 TDI-CCD nadir-viewing camera with resolution better than 2.5 meters
2 TDI-CCD front/rear-viewing cameras with resolution better than 4 meters
1 multi-spectral front-viewing camera with resolution better than 10 meters

The satellite can cover all areas of the Earth between 84 deg. North and 84 deg. South, with the re-visiting period at 59 days. In special cases, the satellite can re-visit the same area in 5 days.

Specifications:

Orbit: 505.984 km circular orbit, inclination 97.421 degrees, local time at descending node 10:30

Mass: ~2630 kg

Operation life: 4-5 years

Cameras:

2.5m res. high-resolution camera (x1) (sweep area width 52 km)
4m res. medium-resolution cameras (x2) (sweep area width 51 km)
10m res. multi-spectral camera (x1) (sweep area width 52 km)

Data transfer:
Compression ratio: 4:1/2:1 for pan-chromatic images and loss-less compression for multi-spectral images
Number of data transfer channels: 2

Astronomy & spaceflight geek penguin. In a relationship w/ Space Shuttle Discovery. Current Priority: Chasing the Chinese Spaceflight Wonder Egg & A Certain Chinese Mars Rover

Offline input~2

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Re: Ziyuan-3, VesselSat-2 TSLC CZ-4B launch January 10, 2012
« Reply #19 on: 01/08/2012 01:53 pm »
Any NOTAM's available?
No NOTAM as of 1452UTC

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