According to a congratulatory letter from Chinese academy of science, it is a radar satellite--JB-7.
Quote from: blackjack on 04/24/2009 10:27 amAccording 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.
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.
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.
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
Quote from: Liss on 04/22/2009 08:39 pmQuote from: jan_carlo_bascu on 04/22/2009 05:23 pmYaogan-6 Launch Videohttp://vod.cctv.com/html/media/worldwidewatch/2009/04/worldwidewatch_300_20090422_18.shtmlThis one is probably better, having animation of solar panels deployment: http://space.tv.cctv.com/video/VIDE1240408837000110Is 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.
Quote from: jan_carlo_bascu on 04/22/2009 05:23 pmYaogan-6 Launch Videohttp://vod.cctv.com/html/media/worldwidewatch/2009/04/worldwidewatch_300_20090422_18.shtmlThis one is probably better, having animation of solar panels deployment: http://space.tv.cctv.com/video/VIDE1240408837000110Is the launch time 10:55:04.562 or so?
Yaogan-6 Launch Videohttp://vod.cctv.com/html/media/worldwidewatch/2009/04/worldwidewatch_300_20090422_18.shtml
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
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
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...
Quote from: Phillip Clark on 04/26/2009 05:09 pmVery 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.