Author Topic: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09  (Read 25794 times)

Offline Liss

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Re: Yaogan 6 -- CZ-2C -- Taiyuan
« Reply #20 on: 04/24/2009 12:30 pm »
According to a congratulatory letter from Chinese academy of science, it is a radar satellite--JB-7.
Oh well :-)
It'd be interesting to see the letter, even in Chinese.
This message reflects my personal opinion based on open sources of information.

Offline blackjack

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Re: Yaogan 6 -- CZ-2C -- Taiyuan
« Reply #21 on: 04/24/2009 02:08 pm »
According to a congratulatory letter from Chinese academy of science, it is a radar satellite--JB-7.
Oh well :-)
It'd be interesting to see the letter, even in Chinese.
"电子所" means Electronic Institute. The payload was developed in Shanghai. All the things prove it is a radar satellite and the only possibility is JB-7.
« Last Edit: 04/24/2009 02:30 pm by blackjack »

Offline Liss

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #22 on: 04/24/2009 02:30 pm »
Well, I cannot see words 尖兵七号 in it, so I understand you that the congratualtion says about radar satellite without specifying its name.
This message reflects my personal opinion based on open sources of information.

Offline blackjack

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #23 on: 04/24/2009 02:31 pm »
Well, I cannot see words 尖兵七号 in it, so I understand you that the congratualtion says about radar satellite without specifying its name.
"电子所" means Electronic Institute. The payload was developed in Shanghai. All the things prove it is a radar satellite and the only possibility is JB-7.

Offline blackjack

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #24 on: 04/24/2009 02:36 pm »
According to newspaper, the main stylist of the satellite called "YG-6" is "李晔", the engineerring stylist is "魏钟铨". As I know, they are the stylists of JB-7 in plan.
« Last Edit: 04/24/2009 02:38 pm by blackjack »

Offline Liss

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #25 on: 04/24/2009 05:43 pm »
According to newspaper, the main stylist of the satellite called "YG-6" is "李晔", the engineerring stylist is "魏钟铨". As I know, they are the stylists of JB-7 in plan.
Direcror Li Ye and chief designer Wei Zhongquan, who were in the same positions for JB-5. So you are most probably right about the radar satellite!
But... in http://www.china-spacenews.com/n435777/n502211/56052.html I can find three names:
总指挥 颜履杰、= satellite commander in chief Yan Liujie
总设计师 李晔讲述 = satellite chief designer Li Ye
工程总师 魏钟铨 = ... Wei Zhongquan
What is the title of Wei Zhongquan? Is he the boss for Yan Liujie and Li Ye or not?
« Last Edit: 04/24/2009 08:00 pm by Liss »
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Offline input~2

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #26 on: 04/24/2009 07:55 pm »
And here is a piece of debris from the launcher 1st stage (edit: recovered near Caichuan village (N335255E1101817) in Shaanxi province)

source
« Last Edit: 11/30/2011 09:25 pm by input~2 »

Offline Liss

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #27 on: 04/24/2009 08:38 pm »
The 061907.2 marking on the piece mentioned in text is interesting.
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Offline input~2

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #28 on: 04/26/2009 09:40 am »
in http://www.china-spacenews.com/n435777/n502211/56052.html I can find three names:
总指挥 颜履杰、= satellite commander in chief Yan Liujie
总设计师 李晔讲述 = satellite chief designer Li Ye
工程总师 魏钟铨 = ... Wei Zhongquan
总指挥颜履杰 = Yn Lǚji, (YaoGan-6) program manager
总设计师李晔 = Lĭ Y, (Yaogan-6) chief design engineer

中国航天科技集团公司总经理马兴瑞 = Ma Xingrui , General Manager of China Aerospace Science and Technology Corporation (CASC)
副总经理袁家军 =  Yun Jiājūn, (CASC) deputy general manager
工程总师 魏钟铨 = Wi Zhōngqun, general engineer

Mr. Wei Zhongquan has co-authored a book on SAR satellites (Synthetic aperture radar satellite-合成孔径雷达卫星. Science Press, Beijing, 2001),  he is also the co-author of a 1993 paper on Chinese spaceborne SAR with this abstract:"The primary studies on spaceborne synthetic aperture radar (SAR) in China are discussed. The SAR will be launched aboard a Chinese satellite and operated at L-band with HH polarization. The purpose of the mission in consideration is dedicated to resources and environment uses, especially to natural disaster monitoring. The ground resolution is designed as 25 m x 25 m for detailed mode and 100 m x 100 m for wide scan-SAR mode. The off-nadir angle can be varied from 20 to 40 deg. The key system concepts are introduced."

Offline limen4

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #29 on: 04/26/2009 02:15 pm »
Yaogan-6 Launch Video

http://vod.cctv.com/html/media/worldwidewatch/2009/04/worldwidewatch_300_20090422_18.shtml

This one is probably better, having animation of solar panels deployment: http://space.tv.cctv.com/video/VIDE1240408837000110

Is the launch time 10:55:04.562 or so?

Thank you for the link, Igor.   The satellite as depicted only shows a box-shaped body and a pair of solar panels unfolding: no radar antenna or other instrumentation visible.

I wonder whether the animation represents the true satellite or whether it is simply a generic satellite design, simply to show something being put into orbit?

And Jonathan, you could well be right about the second stage de-orbiting itself but leaving the separation motor covers in orbit.   As you say, the decay rates sh is ould give us a clue.

I attached 2 images of Shijian-7, which have been published on commemorative items issued by Beijing Institute Tracking & Telecom Technology (BITTT) and Xian Satellite Control Center (XSCC). SJ-7, launched in 2005, was also bulit by Shanghai Academay. The similarity to the spacecraft depicted in the YG-6 launch video is obvious. Maybe SJ-7 and YG-6 use the same satellite bus.
Gert

Offline Liss

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #30 on: 04/26/2009 02:25 pm »
Thank you, input~2. My computer cannot show the diacritical signs, it substitutes Russian letters for them, but this is not a problem and your comments are really interesting.
This message reflects my personal opinion based on open sources of information.

Offline Phillip Clark

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #31 on: 04/26/2009 05:09 pm »
I attached 2 images of Shijian-7, which have been published on commemorative items issued by Beijing Institute Tracking & Telecom Technology (BITTT) and Xian Satellite Control Center (XSCC). SJ-7, launched in 2005, was also bulit by Shanghai Academay. The similarity to the spacecraft depicted in the YG-6 launch video is obvious. Maybe SJ-7 and YG-6 use the same satellite bus.
Gert

Very interesting to see these images, thank you! - I cannot recall a decent depiction of Shijian 7 before.   That satellite is still occasionally manoeuvring in orbit, and I had it logged as being some kind of propulsion system test - like Shijian 9 is supposed to be (see Gunter Krebs website).

Yaogan 6 has been doing some manoeuvring itself and I am waiting to see what its final orbit will be ..........
I've always been crazy but it's kept me from going insane - WJ.

Offline Phillip Clark

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #32 on: 04/26/2009 06:18 pm »
Following on from my comment above, Yaogan 6 has manoeuvred to the following orbit:

Apr 26.25   97.66 deg   94.87 minutes   512 km   513 km

This orbit repeats its groundtrack after 713 circuits - every 47 days.
« Last Edit: 04/26/2009 06:26 pm by Phillip Clark »
I've always been crazy but it's kept me from going insane - WJ.

Offline summit2

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #33 on: 04/27/2009 09:25 am »
To compare, find attached a SJ-7 mockup (Beijing exhibition last year)

I agree about the specific propulsion system of SJ-9 (ionic following Zhuhai 2008) but if Yaogan-6 is SJ-9, I cannot understand the size parameter : SJ-9 is a small satellite.

So I have some doubts about the Yaogan-6 platform
« Last Edit: 04/27/2009 09:33 am by summit2 »

Offline Phillip Clark

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #34 on: 04/27/2009 11:14 am »
To compare, find attached a SJ-7 mockup (Beijing exhibition last year)

I agree about the specific propulsion system of SJ-9 (ionic following Zhuhai 2008) but if Yaogan-6 is SJ-9, I cannot understand the size parameter : SJ-9 is a small satellite.

So I have some doubts about the Yaogan-6 platform

I wasn't saying that Shijian 9 = Yaogan 6.   Simply that I had wondered whether Shijian 9 would be like Shijian 7, irrespective of the the same platform possibly being used.

Maybe some low-thrust propulsion technology from SJ7 has been applied to Yaogan 6?

A pity that we don't have designators and details for the Shanghai platforms as we now do for the CAST ones.   Something to look forward to in the future!

Has anyone seen an official mass for Shijian 7?   Or been next to the display model to give an idea of its scale?
« Last Edit: 04/27/2009 03:41 pm by Phillip Clark »
I've always been crazy but it's kept me from going insane - WJ.

Offline Liss

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #35 on: 05/06/2009 07:04 pm »
Very interesting to see these images, thank you! - I cannot recall a decent depiction of Shijian 7 before.   That satellite is still occasionally manoeuvring in orbit, and I had it logged as being some kind of propulsion system test...
Phillip, there are indications on a Chinese forum http://www.fyjs.cn/viewarticle.php?id=166801 that SJ-7 is the testbed for an space-based early warning system.
This message reflects my personal opinion based on open sources of information.

Offline Phillip Clark

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Re: Yaogan 6 -- CZ-2C -- Taiyuan - April 22, 09
« Reply #36 on: 05/07/2009 11:23 am »
Very interesting to see these images, thank you! - I cannot recall a decent depiction of Shijian 7 before.   That satellite is still occasionally manoeuvring in orbit, and I had it logged as being some kind of propulsion system test...
Phillip, there are indications on a Chinese forum http://www.fyjs.cn/viewarticle.php?id=166801 that SJ-7 is the testbed for an space-based early warning system.

I wonder whether the Shijian and Shiyan programmes are the equivalent of the Cosmos programme?

Since Gunter Krebs has the drawing (not photograph) of Shijian 7 on his website as Shijian 9, I wonder whether that will be the second "early warning" satellite testbed?

And where is China's ELINT satellite programme?   Some Shenzhous are supposed to have carried possible ELINT payloads on the orbital modules that operated after the return of the descent modules and of course there are the unexplained Chang Kong satellites from the second half of the 1970s.   Maybe we can look forward to more Jianbing/Yaogan series for the ELINT programme?   Or perhaps such payloads can be carried as supplementary instrumentation on other satellites.

(Moderator - this discussion has moved away from Yaogan 6 itself, so maybe we need a transfer to a new thread?)
I've always been crazy but it's kept me from going insane - WJ.

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