Author Topic: Yaogan-31 group 01 & Weina JS - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)  (Read 10965 times)

Offline ace5

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #20 on: 04/11/2018 10:23 am »
Other launch images (from Xinhua)

Larger versions (credit: Wang Jiangbo/Xinhua):

A TLE for 43275 has arrived.
Typical 'Chinese NOSS' orbit.

Apparently they are co-planar with the YG-17 trio, making the system to have 6 trios of satellites in 3 orbital planes.

whats the object that falls from the rocket at launch? Doesnt like insulation panels.

Offline input~2

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #21 on: 04/11/2018 02:07 pm »
A 7th object has been cataloged:

2018-034G/43281 in 1088 x 1099 km x 63.40°

Offline gwiz

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #22 on: 04/11/2018 04:25 pm »
Objects now identified by JSpOC.  A to C are Yaogan 31A to 31C, D is the rocket, E is Weina 1B and rest are debris.

Offline Liss

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #23 on: 04/11/2018 06:18 pm »
Objects now identified by JSpOC.  A to C are Yaogan 31A to 31C, D is the rocket, E is Weina 1B and rest are debris.

Prior to this, objects A and F have been swapped.
« Last Edit: 05/10/2018 07:12 am by Liss »
This message reflects my personal opinion based on open sources of information.

Offline input~2

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #24 on: 04/12/2018 09:53 am »
Possible first stage debris (via 9ifly)

Offline Liss

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #25 on: 04/13/2018 12:07 pm »
Objects now identified by JSpOC.  A to C are Yaogan 31A to 31C, D is the rocket, E is Weina 1B and rest are debris.

Judging from orbital behavior, I wonder if object G is Weina in fact.
Or, more probably, that some TLEs for G and C should be reassigned.

« Last Edit: 04/13/2018 12:12 pm by Liss »
This message reflects my personal opinion based on open sources of information.

Offline Liss

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #26 on: 04/23/2018 09:15 am »
Well, it's now obvious that object C is the one of three which is maneuvering to shift its track to the west of other two. (In original JB-8 triplets, two satellites were doing this but one is enough, of course.)

It's more difficult to interpret behavior of objects E and H as seen here:

« Last Edit: 04/23/2018 10:08 am by Liss »
This message reflects my personal opinion based on open sources of information.

Offline Liss

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Re: YG-31-01 A/B/C - CZ-4C - JSLC - April 10, 2018 (04:25 UTC)
« Reply #27 on: 04/26/2018 07:38 am »
Well, I think there are some interesting details in this frame from a launch report.

I believe we see the moment of Main Star Separation (主星分离), fourth group of symbols from the right at the screen.
The preceding event is Upper Spacer Separation and the next is Lower Spacer Separation.
Then Subsatellite 2 Separation (副星2分离) is to occur, and the last event is MO-1 Satellite Separation (MO-1卫星分离).

Anybody on MO-1? :-)

« Last Edit: 04/26/2018 07:39 am by Liss »
This message reflects my personal opinion based on open sources of information.

Offline input~2

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 Back to the names of the satellites onboard:
 From http://www.xinhuanet.com/2018-04/10/c_1122660052.htm
 遥感三十一号01组卫星和微纳技术试验卫星
 or in pinyin:
 yáogǎn sānshíyī hào 01 zǔ wèixīng hé wēi nà jìshù shìyàn wèixīng
 
 which translates as:
 Yaogan-31 group 01 satellites and micro/nano ("wēinà") technology test satellite

Offline Liss

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On May 10 objects A, B and C (the outlier) achieved the usual triangle configuration.
No significant changes in E/H -- these two are very close in height but different in inclination.
This message reflects my personal opinion based on open sources of information.

Offline Liss

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On June 9-12 object E (presumable Weina) lowered her orbit from 1092.3 to 1090.0 km equal to the height of the triplet trailing it by 75° .
Object H was left at 1092.4 km, slightly higher than before the maneuver.

« Last Edit: 07/19/2018 08:57 am by Liss »
This message reflects my personal opinion based on open sources of information.

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