Author Topic: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)  (Read 18517 times)

Offline beidou

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According to Chinese news reports: this project was kicked off on Dec 26th, and the principal contractor is the National Administration of Surveying, Mapping and Geoinformation of China (NASMG). Gaofen-7 will have similar but better capability than that of Ziyuan-3, which was launched at the beginning of 2012.
« Last Edit: 11/05/2019 09:11 am by input~2 »

Offline Satori

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Re: Gaofen-7 - CZ-2D - Jiuquan - December 2018
« Reply #1 on: 09/04/2018 03:54 pm »
Launch to take place in December 2018.

Offline zandr

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Re: Gaofen-7 - CZ-2D - Jiuquan - 2019
« Reply #2 on: 03/21/2019 08:09 pm »
http://www.xinhuanet.com/english/2019-03/21/c_137913427.htm
Quote
Source: Xinhua| 2019-03-21 20:38:42
BEIJING, March 21 (Xinhua) ...
Zhang Kejian, vice minister of industry and information technology and head of SASTIND and CNSA, said at a press conference that after the launch of the Gaofen-7 satellite later this year, China will complete the construction of its space-based Earth observation system with seven high-resolution satellites...
« Last Edit: 03/22/2019 01:35 am by zubenelgenubi »

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Re: Gaofen-7 - CZ-2D - Jiuquan - 2019
« Reply #3 on: 09/30/2019 12:58 am »
Launch scheduled for November 2019 according to 9ifly.

BTW past data gives the satellite mass as 2400 kg with the orbit altitude at 500 km, so (confirmed by official reports) this will be launched on a CZ-4B out of Taiyuan instead.
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Offline tehwkd

Re: Gaofen-7 - CZ-2D - Jiuquan - 2019
« Reply #4 on: 09/30/2019 02:31 am »
Launch scheduled for November 2019 according to 9ifly.

BTW past data gives the satellite mass as 2400 kg with the orbit altitude at 500 km, so (confirmed by official reports) this will be launched on a CZ-4B out of Taiyuan instead.

November is based on:
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Offline tehwkd

Re: Gaofen-7 - CZ-4B - Taiyuan - November 2019
« Reply #5 on: 11/02/2019 03:16 am »
Post has been updated to 0400 UTC tomorrow (Nov3)


Launch possibly happening today around 0400 UTC. No notams and haven't found a second source yet

https://twitter.com/LaunchStuff/status/1190481693351776256
« Last Edit: 11/02/2019 03:27 am by tehwkd »
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Offline Satori

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #6 on: 11/02/2019 09:25 am »
Gaofen-7 and three small satellites:

-  high-altitude test satellite developed by Shenzhen Aerospace Red Sea Special Satellite Co., Ltd.

- Sudan Science Experiment Satellite No.1 (?)

- Tianyi's Space Science and Technology Research Institute Co., Ltd, Xiaoxiang-8
« Last Edit: 11/02/2019 09:32 am by Satori »

Offline zubenelgenubi

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #7 on: 11/02/2019 10:28 am »
Gunter lists Gaofen-7 as a similar, yet improved Ziyuan-3.

The previous 2 ZY-3's were launched to SSO's with a LTDN circa 10:30 am.  Both launched at 03:17 UTC.

(LTDN = local time descending node)

ZY-3 #1 launch thread
ZY-3 #2 launch thread
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Belated congratulations on another international "two-fer" orbital launch day (UTC):
Cygnus NG-12,
this launch.
« Last Edit: 11/14/2019 05:09 pm by zubenelgenubi »
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Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #8 on: 11/03/2019 01:16 am »
Here's the 9ifly thread. There is a report of fog at the launch site.

http://www.9ifly.cn/thread-14212-5-1.html
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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #9 on: 11/03/2019 01:33 am »
The first satellite is called 精致高分试验卫星 or Exquisite High-score Test Satellite or Jingzhi Gaofen Shiyan Weixing.

The second satellite is called 苏丹科学实验卫星一号 or Sudan Scientific Experimental Satellite 1.

The third satellite is called 潇湘一号08星 or Xiaoxiang-1 08.

http://www.9ifly.cn/forum.php?mod=redirect&goto=findpost&ptid=14212&pid=688559

Space insights
Today 11:53 From SpaceNews Superword Edited
Launch Forecast: Tomorrow (November 3) at noon, China will launch the High Score 7 satellite and three small satellites with the Long March IV B carrier rocket at the Taiyuan Satellite Launch Center. The three small satellites are the exquisite high-score test satellite developed by Shanghai Aerospace Technology Research Institute, the Development of Sudan Science Experimental Satellite One by Shenzhen Aerospace Oriental Red Sea Satellite Co., Ltd., and the Xiang-1 08 star developed by Changsha Tianyi Space Science and Technology Research Institute Co., Ltd.
« Last Edit: 11/03/2019 01:34 am by Steven Pietrobon »
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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #10 on: 11/03/2019 01:41 am »
This post is estimating launch at about 3:20 UTC.

http://www.9ifly.cn/forum.php?mod=redirect&goto=findpost&ptid=14212&pid=688583

Guess about 11:20 launch
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Offline GELORD

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #11 on: 11/03/2019 02:14 am »
与战士站岗、炊事员做饭一样,航天员是一种职业,工作就是飞行。

Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #12 on: 11/03/2019 02:20 am »
Launch should be happening about now.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #13 on: 11/03/2019 02:33 am »
Liftoff confirmed.

Picture from somewhere near the launch site.
« Last Edit: 11/03/2019 02:34 am by Galactic Penguin SST »
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Offline tehwkd

Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019
« Reply #14 on: 11/03/2019 02:50 am »
SUCCESS, T-0 0322 UTC

Quote
[Forward congratulations! #高分七号星发射成功# The[mighty] reporter learned from the National Space Administration that at 11:22 today, China successfully launched the high-scoring satellite No. 7 with the Long March 4B carrier rocket at the Taiyuan Satellite Launch Center. The high-scoring satellite No. 7 is China's first civilian sub-meter optical transmission stereo mapping satellite. After the star runs, it will play an important role in land surveying and mapping, urban and rural construction, and statistical surveys. (CCTV reporter Li Xia)



https://www.weibo.com/2656274875/IetKPEAPZ?refer_flag=1001030103_&type=comment#_rnd1572753019416
« Last Edit: 11/03/2019 02:52 am by tehwkd »
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Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #15 on: 11/03/2019 02:57 am »
« Last Edit: 11/03/2019 03:00 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #16 on: 11/03/2019 03:00 am »
Launch video.

https://www.weibo.com/3279752321/IetNSclVP

twitter.com/LaunchStuff/status/1190840955945078784
« Last Edit: 11/03/2019 03:04 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline whiztech

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #17 on: 11/03/2019 03:03 am »
short launch video from Our Space
https://weibo.com/tv/v/IetObpCue

Offline tehwkd

Our Space has deleted their photo and video posts. Here's hoping it doesn't mean anything...
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Our Space has deleted their photo and video posts. Here's hoping it doesn't mean anything...

The post has been resubmitted.

Also it seems thst this flight is also testing 1st stage grid fins as well.
« Last Edit: 11/03/2019 03:41 am by Galactic Penguin SST »
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Offline Steven Pietrobon

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Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #21 on: 11/03/2019 03:48 am »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Interestingly none of the rumored co-passengers have been mentioned in the reports so far. We will have to see if they are really flying with GF-7.

Edit: They are indeed flying on this flight.
« Last Edit: 11/03/2019 04:27 am by Galactic Penguin SST »
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Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #23 on: 11/03/2019 04:20 am »
Report on one the satellites. Article says that 精致一号/Jingzhi 1/Exquisite 1 was launched in November 2017, but I can't find the corresponding launch for this.

"On November 3, 2019, at 11:22:39, the Long March 4B carrier rocket ignited at the Taiyuan Satellite Launch Center, successfully carried out a four-star launch, successfully put the exquisite high-score test satellite into a predetermined orbit, the exquisite high-score test satellite is the second satellite of the exquisite microsatellite platform, It is also the first application of the platform on high-score remote sensing payloads.
...
The series' debut star, the Exquisite One satellite, was successfully launched in November 2017 and has been in orbit for two years so far. High-score remote sensing "exquisite high score" satellite platform weighs about 30KG, load carrying capacity of up to 60KG, maximum load power is not less than 200W."

https://mp.weixin.qq.com/s/gYYHdZqeqfW9Vccfcdscow
« Last Edit: 11/03/2019 04:26 am by Steven Pietrobon »
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Offline tehwkd

Report on Jifeng satellite (Xiaoxiang No. 1 08 Star), the 15th satellite by Tianyi Research Institute


https://www.weibo.com/ttarticle/p/show?id=2309404434519905140746
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Offline Steven Pietrobon

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #25 on: 11/03/2019 04:46 am »
Short video showing the first stage return. Vehicle looked pretty steady coming in for a vertical landing.

https://www.weibo.com/3613317253/Ieu2tAOoF?type=comment

twitter.com/LaunchStuff/status/1190865283357007877
« Last Edit: 11/03/2019 04:49 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #26 on: 11/03/2019 05:15 am »
« Last Edit: 11/03/2019 05:16 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline whiztech

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #27 on: 11/03/2019 06:15 am »
first object

Quote
1 44703U 19072A   19307.26107553 -.00000072  00000-0  00000+0 0  9995
2 44703  97.4860  20.0004 0011496 267.9276 150.8970 15.22978440    13

505 km x 489 km, 97.49º

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #29 on: 11/03/2019 08:45 am »
Report on one the satellites. Article says that 精致一号/Jingzhi 1/Exquisite 1 was launched in November 2017, but I can't find the corresponding launch for this.

The series' debut star, the Exquisite One satellite, was successfully launched in November 2017 and has been in orbit for two years so far. High-score remote sensing "exquisite high score" satellite platform weighs about 30KG, load carrying capacity of up to 60KG, maximum load power is not less than 200W.

https://mp.weixin.qq.com/s/gYYHdZqeqfW9Vccfcdscow

Hede-1 (HEAD-1) on 15 Nov 2017?
It was described as having "exquisite" satellite platform (”精致”卫星平台).
« Last Edit: 11/03/2019 10:13 am by Liss »
This message reflects my personal opinion based on open sources of information.

Online eeergo

.

So why is there a quite noticeable exhaust contrail?
« Last Edit: 11/03/2019 12:55 pm by eeergo »
-DaviD-

Offline tehwkd

So why is there a quite noticeable exhaust contrail?

n2o4 venting? Maybe trying to avoid the smashdown boom that the gridfinned lm2c had or perhaps using it as a visual indicator to find it more easily?
« Last Edit: 11/03/2019 09:32 am by tehwkd »
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Online eeergo

So why is there a quite noticeable exhaust contrail?

n2o4 venting? Maybe trying to avoid the smashdown boom that the gridfinned lm2c had or perhaps using it as a visual indicator to find it more easily?

Doesn't look reddish (could be the illumination though), looks almost like a hidrocarbon-rich sooty exhaust similar to an aircraft's. Just wondering if there's any open loop separate system powering the fins that may be causing it.
-DaviD-

Offline tehwkd

So why is there a quite noticeable exhaust contrail?

n2o4 venting? Maybe trying to avoid the smashdown boom that the gridfinned lm2c had or perhaps using it as a visual indicator to find it more easily?

Doesn't look reddish (could be the illumination though), looks almost like a hidrocarbon-rich sooty exhaust similar to an aircraft's. Just wondering if there's any open loop separate system powering the fins that may be causing it.

Details about these fins haven't been released but the ones in the summer launch of Long March 2C were electric. My guess is that the video is of low enough quality filmed far enough away that it could be orange/red but we don't have enough pixels to be sure.
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Online Alter Sachse

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #34 on: 11/03/2019 12:22 pm »

One day you're a hero  next day you're a clown  there's nothing that is in between
        Jeff Lynne - "21century man"

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #35 on: 11/03/2019 12:37 pm »


17:25....18:10

Control room screen censored  :(
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Offline tehwkd

https://twitter.com/pbdes/status/1190996368791416833

Quote
China's @CGWIC Long March 4B rocket launches Chinese smallsat builder #Spacety 6U cubesat carrying 1st solid-iodine propulsion unit from @ThrustMe_  of France. Satellite has deployed & is communicating. Switch-on & results from ThrustME unit expected w/in a week.
« Last Edit: 11/03/2019 01:24 pm by tehwkd »
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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #38 on: 11/03/2019 02:26 pm »
The correct transcription for the Tianyi satellite is Dianfeng.
This message reflects my personal opinion based on open sources of information.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #39 on: 11/03/2019 02:55 pm »
The correct transcription for the Tianyi satellite is Dianfeng.

So, Xianxiang-1-8 is incorrect or Dianfeng is another designation for the satellite?

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #40 on: 11/03/2019 03:09 pm »
The correct transcription for the Tianyi satellite is Dianfeng.

So, Xianxiang-1-8 is incorrect or Dianfeng is another designation for the satellite?
Yes, a personal name Dianfeng (巅峰号) in addition to the serial name Xiaoxiang-1-08 and the sequential Tianyi-15.
This message reflects my personal opinion based on open sources of information.

Offline jcm

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #41 on: 11/03/2019 03:30 pm »
Report on one the satellites. Article says that 精致一号/Jingzhi 1/Exquisite 1 was launched in November 2017, but I can't find the corresponding launch for this.

"On November 3, 2019, at 11:22:39, the Long March 4B carrier rocket ignited at the Taiyuan Satellite Launch Center, successfully carried out a four-star launch, successfully put the exquisite high-score test satellite into a predetermined orbit, the exquisite high-score test satellite is the second satellite of the exquisite microsatellite platform, It is also the first application of the platform on high-score remote sensing payloads.
...
The series' debut star, the Exquisite One satellite, was successfully launched in November 2017 and has been in orbit for two years so far. High-score remote sensing "exquisite high score" satellite platform weighs about 30KG, load carrying capacity of up to 60KG, maximum load power is not less than 200W."

https://mp.weixin.qq.com/s/gYYHdZqeqfW9Vccfcdscow


At www.lzsat.com we learn that HEAD-1 and today's Jinghzhi gaofan shiyan weixing were built by Shanghai Lizheng Satellite Application Technology Co. Ltd.  上海利正卫星应用技术有限公司以, founded in Nov 2012 and affiliated to the CASC 5th Institute. Unclear to me what the current status of HEAD (Beijing HEAD Aerospace Tech Co Ltd) is and what its relationship to Lizheng is (just customer for the first sat I guess).
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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #42 on: 11/03/2019 03:32 pm »
The correct transcription for the Tianyi satellite is Dianfeng.

Yes, google translate shows Dianfeng in the transliteration but in the English translation box wrecks it as  'Jifeng', "Fengfeng' and various other things depending on the sentence!

Dianfeng means 'summit' I gather?
« Last Edit: 11/03/2019 03:32 pm by jcm »
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Dianfeng means 'summit' I gather?

Affirmative. ("peak" or "pinnacle" would also work as translations depending on the usage)  :)
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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #44 on: 11/03/2019 03:55 pm »
The first satellite is called 精致高分试验卫星 or Exquisite High-score Test Satellite or Jingzhi Gaofen Shiyan Weixing.

The second satellite is called 苏丹科学实验卫星一号 or Sudan Scientific Experimental Satellite 1.

The third satellite is called 潇湘一号08星 or Xiaoxiang-1 08.

http://www.9ifly.cn/forum.php?mod=redirect&goto=findpost&ptid=14212&pid=688559

Space insights
Today 11:53 From SpaceNews Superword Edited
Launch Forecast: Tomorrow (November 3) at noon, China will launch the High Score 7 satellite and three small satellites with the Long March IV B carrier rocket at the Taiyuan Satellite Launch Center. The three small satellites are the exquisite high-score test satellite developed by Shanghai Aerospace Technology Research Institute, the Development of Sudan Science Experimental Satellite One by Shenzhen Aerospace Oriental Red Sea Satellite Co., Ltd., and the Xiang-1 08 star developed by Changsha Tianyi Space Science and Technology Research Institute Co., Ltd.

What google is translating as "Shenzhen Aerospace Oriental Red Sea Satellite Co., Ltd" is Shenzhen Aerospace DFH HIT Satellite Co Ltd,
DFH = Dongfanghong, "The East Is Red", name of China's first sat and a component of several related company names.
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Offline jcm

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #45 on: 11/03/2019 04:13 pm »
A remaining mystery is this Sudan Science test satellite.   ? I haven't been able to find any evidence of a China-Sudan joint satellite technology agreement although it seems plausible. It doesn't seem to be a mistranslation since the English xinhua article http://www.xinhuanet.com/english/2019-11/03/c_138525378.htm explicitly says it's developed for Sudan. If so, the National Centre for Research and the Sudan Univ. of Science and Tech in Khartoum seem likely participants.
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Offline koroljow

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #46 on: 11/03/2019 04:20 pm »
Jingzhi Gaofen Shiyan Weixing = Huangpu-1 (黄埔一号)
first experimental satellite for a planned 90 satellite LEO-constellation (named Dawan Zhitong or Grand Bay Zhitong)
source: http://scitech.people.com.cn/n1/2019/1103/c1007-31434697.html
Geschichte und Geschichten aus sechs Jahrzehnten Raumfahrt:
http://www.raumfahrtkalender.de

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #47 on: 11/03/2019 07:47 pm »
What google is translating as "Shenzhen Aerospace Oriental Red Sea Satellite Co., Ltd" is Shenzhen Aerospace DFH HIT Satellite Co Ltd
Shenzhen Aerospace DFH Haite Satellite Co Ltd.
I think this Haite is a Chinese transcription of high-tech, but I may be wrong.
This message reflects my personal opinion based on open sources of information.

Online eeergo


Interstage disposal strategy, gridfins included (TM): push it to the bottom of the crevass with some sticks.


I do hope it was just a way to stabilize it and pick it up more easily.  ::)


https://twitter.com/LaunchStuff/status/1191240973210279936
-DaviD-

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #49 on: 11/04/2019 01:12 pm »
Fantastic to see China advancing on vertical landing. Fingers crossed that they get it working. Probably not with this version of the long march series though. But I love the steps they take :)

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #50 on: 11/05/2019 06:58 am »
Does anyone know the exact launch time?
(Milliseconds)
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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #51 on: 11/06/2019 11:07 am »
Jingzhi Gaofen Shiyan Weixing = Huangpu-1 (黄埔一号)
first experimental satellite for a planned 90 satellite LEO-constellation (named Dawan Zhitong or Grand Bay Zhitong)
source: http://scitech.people.com.cn/n1/2019/1103/c1007-31434697.html
So the first one is Huangpu-1 and the second is SRSS-1.
« Last Edit: 11/06/2019 11:08 am by Liss »
This message reflects my personal opinion based on open sources of information.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #52 on: 11/06/2019 02:13 pm »
A remaining mystery is this Sudan Science test satellite.   ? I haven't been able to find any evidence of a China-Sudan joint satellite technology agreement although it seems plausible. It doesn't seem to be a mistranslation since the English xinhua article http://www.xinhuanet.com/english/2019-11/03/c_138525378.htm explicitly says it's developed for Sudan. If so, the National Centre for Research and the Sudan Univ. of Science and Tech in Khartoum seem likely participants.
Sudan launches its first ever satellite in partnership with China

Online eeergo

Grid fin!

http://www.9ifly.cn/forum.php?mod=redirect&goto=findpost&ptid=14212&pid=688818

Interesting: it seems the grid fins for this flight are made in titanium alloy (like F9-B5's?), but not forged -- instead laser-welded into shape from 38 individual pieces by a 6-axis robot. Also, the fins used in this flight are a different (in which way) from July's CZ-2C's.

https://mp.weixin.qq.com/s/h50mmOiCPyPhzA4OC4Z76A

Also, from space:

https://twitter.com/LaunchStuff/status/1192042883416776704
-DaviD-

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #54 on: 11/07/2019 02:15 am »
Just in case the tweet gets deleted!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #55 on: 11/08/2019 08:15 am »
China confirms reception of data from Gaofen-7 satellite.
http://www.xinhuanet.com/english/2019-11/08/c_138539279.htm
与战士站岗、炊事员做饭一样,航天员是一种职业,工作就是飞行。

Online eeergo

Grid fin!

http://www.9ifly.cn/forum.php?mod=redirect&goto=findpost&ptid=14212&pid=688818

Interesting: it seems the grid fins for this flight are made in titanium alloy (like F9-B5's?), but not forged -- instead laser-welded into shape from 38 individual pieces by a 6-axis robot. Also, the fins used in this flight are a different (in which way) from July's CZ-2C's.

https://mp.weixin.qq.com/s/h50mmOiCPyPhzA4OC4Z76A


Post-flight: https://twitter.com/LaunchStuff/status/1193137737588727808
-DaviD-

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #59 on: 03/13/2020 03:20 pm »
twitter.com/aj_fi/status/1238490845185224704

Quote
Close up look at the grid fins on a Long March 4B launched in November, with engineer Chen Xuewei. These apparently reduced the target drop zone by 85%. Images: SAST mp.weixin.qq.com/s/ReFpPyolP6n6…

https://twitter.com/aj_fi/status/1238490848180002820

Quote
An earlier look:

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #60 on: 03/13/2020 04:20 pm »
One day you're a hero  next day you're a clown  there's nothing that is in between
        Jeff Lynne - "21century man"

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #61 on: 08/21/2020 12:28 pm »
From Xinhua,

China's Gaofen-7 satellite put into service.

The China National Space Administration announced Thursday that the Gaofen-7 Earth observation satellite has been put into service, representing significant progress for the country's surveying and mapping capabilities.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #62 on: 08/21/2020 05:51 pm »
Support your local planetarium! (COVID-panic and forward: Now more than ever.)
My current avatar is saying "i wants to go uppies!"

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #63 on: 08/24/2020 05:59 pm »
From Xinhua,
Where is this?
The City of Huludao.
https://en.wikipedia.org/wiki/Huludao


It's also where all of China's nuclear submarine are built by the way.

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Re: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)
« Reply #64 on: 10/30/2020 09:30 am »
the latest issue of the journal Chinese Space Science & Technology (Volume 40 Issue 5) has a few papers (in Chinese) on GF-7, its overall design and its orbit design
http://zgkj.cast.cn/EN/1000-758X/home.shtml

 

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