Author Topic: TianHui-1 CZ-2D launch August 24 2010  (Read 14691 times)

Offline input~2

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TianHui-1 CZ-2D launch August 24 2010
« on: 08/23/2010 04:52 am »
The launch with CZ-2D from Jiuquan was first announced to-day August 23.
http://news.china.com.cn/rollnews/2010-08/23/content_3933241.htm
Tianhui can be translated as "Sky drawing"; it is thought to be is a small mapping satellite.
« Last Edit: 08/23/2010 05:17 am by input~2 »

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #1 on: 08/23/2010 08:40 am »
It's defined as a"stereo-topographic" satellite
(Xinhua in Russian)
http://russian.news.cn/science/2010-08/23/c_13457688.htm

Online Chris Bergin

Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #2 on: 08/24/2010 12:17 am »
If we could keep an eye on this one launching, it'd be appreciated.
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Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #3 on: 08/24/2010 07:49 am »
Successful launch.
Lift-off took place at 15:10 LT (0710UTC)
http://news.mod.gov.cn/headlines/2010-08/24/content_4187451.htm

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #4 on: 08/24/2010 08:28 am »
The same China Ministry of Defense site has pictures of the launch now.

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #5 on: 08/24/2010 09:05 am »

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #6 on: 08/24/2010 09:10 am »

Online Chris Bergin

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Offline Salo

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Offline input~2

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Offline Liss

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #10 on: 08/24/2010 10:47 am »
Confirmed in orbit: 97.35°, 491.6x503.5 km (above the sphere of 6378.14 km), 94.59 min.
This message reflects my personal opinion based on open sources of information.

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #11 on: 08/24/2010 11:47 am »
Confirmed in orbit: 97.35°, 491.6x503.5 km (above the sphere of 6378.14 km), 94.59 min.
Is it 94.59min or 94.53min?

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #12 on: 08/24/2010 12:51 pm »
A video here.
 Actual lift-off time was 07:10:04.075 UTC

Offline Liss

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #13 on: 08/24/2010 09:21 pm »
Confirmed in orbit: 97.35°, 491.6x503.5 km (above the sphere of 6378.14 km), 94.59 min.
Is it 94.59min or 94.53min?
94.59 if we speak of real period, node to node.
This message reflects my personal opinion based on open sources of information.

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #14 on: 08/25/2010 09:22 am »
Apparently more than 24 hours after Tianhui-1 launch, there is still only one object recorded in orbit by US sources.
Interestingly this is still the case for YaoGan-2 and YaoGan-7, both launched long ago.

Online gwiz

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #15 on: 08/25/2010 10:35 am »
Apparently more than 24 hours after Tianhui-1 launch, there is still only one object recorded in orbit by US sources.
Interestingly this is still the case for YaoGan-2 and YaoGan-7, both launched long ago.
Possibly these payloads are lightweight for the launch vehicle, leaving enough propellant for a large post-deployment retro burn.

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #16 on: 08/25/2010 11:26 am »
Apparently more than 24 hours after Tianhui-1 launch, there is still only one object recorded in orbit by US sources.
Interestingly this is still the case for YaoGan-2 and YaoGan-7, both launched long ago.
Possibly these payloads are lightweight for the launch vehicle, leaving enough propellant for a large post-deployment retro burn.
As a reference, the maximum SSO payload capability for CZ-2D is said to be 1300 kg for an altitude of 645 km (source: CGWIC).
AFAIU, such a maneuver would only involve the YF-24C's Verniers  (ie YF-23 in the Chinese version) as the YF-22B main engine for the 2nd stage does not seem to be restartable...  ???
« Last Edit: 08/26/2010 02:28 pm by input~2 »

Offline input~2

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #17 on: 08/26/2010 05:49 pm »
A video here.
 Actual lift-off time was 07:10:04.075 UTC
Looking closely at the video (seconds 00:19 to 00:21) it seems that the action of the Verniers is represented, prior to satellite separation, in the visualisation screen (3rd from left) between 487 and 489 seconds into the flight. The satellite, still attached to the second stage, is in the foreground.

Offline limen4

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Re: TianHui-1 CZ-2D launch August 24 2010
« Reply #18 on: 09/21/2010 07:56 pm »
TH-1 was launched by CZ-2D Y14.
« Last Edit: 09/21/2010 08:01 pm by limen4 »

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