Author Topic: Gaofen-7 - CZ-4B - Taiyuan - November 3, 2019 (03:22 UTC)  (Read 19021 times)

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 32466
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 21044
  • Likes Given: 3575
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 32466
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 21044
  • Likes Given: 3575
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.

Offline Galactic Penguin SST

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 »
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 Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 32466
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 21044
  • Likes Given: 3575
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 »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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
Custodian of NextLaunch & LaunchStuff |   Utilizer of Google

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 32466
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 21044
  • Likes Given: 3575
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.

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 32466
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 21044
  • Likes Given: 3575
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

  • Full Member
  • *
  • Posts: 170
  • Terengganu, Malaysia
  • Liked: 174
  • Likes Given: 417
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

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 Liss

  • Full Member
  • ****
  • Posts: 1716
  • Moscow, Russia
  • Liked: 976
  • Likes Given: 61
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 »
Custodian of NextLaunch & LaunchStuff |   Utilizer of Google

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.
Custodian of NextLaunch & LaunchStuff |   Utilizer of Google

Online Alter Sachse

  • Senior Member
  • *****
  • Posts: 2047
  • Near Heidelberg
  • Liked: 1088
  • Likes Given: 1435
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"

Online Alter Sachse

  • Senior Member
  • *****
  • Posts: 2047
  • Near Heidelberg
  • Liked: 1088
  • Likes Given: 1435
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  :(
One day you're a hero  next day you're a clown  there's nothing that is in between
        Jeff Lynne - "21century man"

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 »
Custodian of NextLaunch & LaunchStuff |   Utilizer of Google

Online Chris Bergin

Support NSF via L2 -- Help improve NSF -- Site Rules/Feedback/Updates
**Not a L2 member? Whitelist this forum in your adblocker to support the site and ensure full functionality.**

Offline Liss

  • Full Member
  • ****
  • Posts: 1716
  • Moscow, Russia
  • Liked: 976
  • Likes Given: 61
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.

Offline Satori

  • Moderator
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 14017
  • Campo do Gerês - Portugal
  • Liked: 1601
  • Likes Given: 924
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?

 

Advertisement NovaTech
Advertisement SkyTale Software GmbH
Advertisement Northrop Grumman
Advertisement
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
1