Author Topic: Yaogan-30-group 03 - CZ-2C - XSLC - December 25, 2017 (19:44 UTC)  (Read 9889 times)

Online Galactic Penguin SST

Exact launch time is 19:44:05.269 UTC.
Launch code is 07-83.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online Galactic Penguin SST

Some more photos of this launch:
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online Galactic Penguin SST

Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline input~2

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Re: Yaogan-30-03 - CZ-2C - XSLC - December 25, 2017 (19:44 UTC)
« Reply #23 on: 12/26/2017 04:51 AM »
Exact launch time is 19:44:05.269 UTC.
Launch code is 07-83.
One explanation why launch code is 07-83 and not 07-82 could be that Beidou-3 MEO3/MEO4 was initially supposed to launch before this one (to be confirmed after next Beidou launch)

Offline input~2

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Re: Yaogan-30-03 - CZ-2C - XSLC - December 25, 2017 (19:44 UTC)
« Reply #24 on: 12/26/2017 05:02 AM »
4 objects cataloged by USSTRATCOM:

2017-085A/43081 in 590 x 603 km x 35.00
2017-085B/43082 in 589 x 605 km x 34.99
2017-085C/43083 in 589 x 605 km x 34.99

2017-085D/43084 in 483 x 626 km x 34.67 (CZ-2C 2nd stage)

Offline input~2

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Re: Yaogan-30-03 - CZ-2C - XSLC - December 25, 2017 (19:44 UTC)
« Reply #25 on: 12/26/2017 05:10 AM »
« Last Edit: 12/26/2017 06:26 AM by input~2 »

Offline input~2

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View of the control center 6 minutes after lift-off

4 objects cataloged by USSTRATCOM:

2017-085A/43081 in 590 x 603 km x 35.00
2017-085B/43082 in 589 x 605 km x 34.99
2017-085C/43083 in 589 x 605 km x 34.99

2017-085D/43084 in 483 x 626 km x 34.67 (CZ-2C 2nd stage)

Do they put that on the internet somewhere?
Thanks

Offline input~2

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4 objects cataloged by USSTRATCOM:

2017-085A/43081 in 590 x 603 km x 35.00
2017-085B/43082 in 589 x 605 km x 34.99
2017-085C/43083 in 589 x 605 km x 34.99

2017-085D/43084 in 483 x 626 km x 34.67 (CZ-2C 2nd stage)

Do they put that on the internet somewhere?
Thanks
Orbits are derived from TLE available on the Net

Offline AStick

4 objects cataloged by USSTRATCOM:

2017-085A/43081 in 590 x 603 km x 35.00
2017-085B/43082 in 589 x 605 km x 34.99
2017-085C/43083 in 589 x 605 km x 34.99

2017-085D/43084 in 483 x 626 km x 34.67 (CZ-2C 2nd stage)

Do they put that on the internet somewhere?
Thanks

Yes.  All TLEs are found free on www.space-track.org.  You just need to create an account.  TLEs are not to be disseminated without the prior approval of USSTRATCOM but the info here is free to post.

Offline jcm

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I continue to be confused by this constellation - if it is SIGINT, why is it only at 35 degree inc?
Makes it unlikely that it is a global system aimed at e.g. US and Russia

-  Operating in conjunction with a polar constellation?

-  Targeted specifically at India?

-  Targeted at South China Sea naval activities?

-  Actually a comms constellation to support users in China only?
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Offline Alter Sachse

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quote:
-  Operating in conjunction with a polar constellation?

I've read somewhere here that the satellites with Yaogan 30 (15.05.2016) work together.
98.07 97.54min 626 656

Online russianhalo117

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quote:
-  Operating in conjunction with a polar constellation?

I've read somewhere here that the satellites with Yaogan 30 (15.05.2016) work together.
98.07 97.54min 626 656

That is correct as stated in an article by Chinese state media during the first launch.

Offline Liss

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quote:
-  Operating in conjunction with a polar constellation?

I've read somewhere here that the satellites with Yaogan 30 (15.05.2016) work together.
98.07 97.54min 626 656

That is correct as stated in an article by Chinese state media during the first launch.
Is it correct that the three triplets work with YG-24 and GF-9 too? Or only YG-30? Why?
This message reflects my personal opinion based on open sources of information.

Offline SciNews

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Long March-2C launched three Yaogan-30 03 satellites

A Long March-2C rocket launched the third group of three Yaogan-30 remote sensing satellites from Xichang Satellite Launch Center, Sichuan province, on 25 December 2017, at 19:44 UTC (03:44 local time). According to official sources, the satellites entered their preset orbit.

Online russianhalo117

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quote:
-  Operating in conjunction with a polar constellation?

I've read somewhere here that the satellites with Yaogan 30 (15.05.2016) work together.
98.07 97.54min 626 656

That is correct as stated in an article by Chinese state media during the first launch.
Is it correct that the three triplets work with YG-24 and GF-9 too? Or only YG-30? Why?
it is quite possible that they work together but all we know from the State media and the forums in China is that YG-30 operates with the YG-30 Groups and that we may see additional launches for this Constellation in 2018 to further expand coverage in this multi inclination constellation.

Offline Steven Pietrobon

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Capture from SciNews's excellent video (this user must have some great sources). Shows the three satellites as 07, 08 and 09.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline jcm

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Capture from SciNews's excellent video (this user must have some great sources). Shows the three satellites as 07, 08 and 09.

I'm guessing this numbering is the manufacturer's and applies to the CX-5 name  (Chuangxin-5 07 xing, etc)
rather than to the YG-30 name which always seems to be used with the 'zu' (group) numbering, YG 30 hao 03 zu 01 zing etc.
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Offline Liss

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it is quite possible that they work together but all we know from the State media and the forums in China is that YG-30 operates with the YG-30 Groups and that we may see additional launches for this Constellation in 2018 to further expand coverage in this multi inclination constellation.
I doubt it very much because orbital heights are different and hence there is no synchronization in movements of YG-24/GF-9/YG-30 optical birds with the three triplets which are not optical per official statements.
Yet I'm open to a possibility of three additional launches to bring the constellation to six planes x three satellites.
This message reflects my personal opinion based on open sources of information.

Offline jcm

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it is quite possible that they work together but all we know from the State media and the forums in China is that YG-30 operates with the YG-30 Groups and that we may see additional launches for this Constellation in 2018 to further expand coverage in this multi inclination constellation.
I doubt it very much because orbital heights are different and hence there is no synchronization in movements of YG-24/GF-9/YG-30 optical birds with the three triplets which are not optical per official statements.
Yet I'm open to a possibility of three additional launches to bring the constellation to six planes x three satellites.

I'm also skeptical, does someone have a link to the original claim? Seems like it could be a confusion with a statement that the YG-30 Groups would work with each other (as opposed to with the original YG-30)
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