Author Topic: Long March-2C launch with Yaogan 30-01 - XSLC - September 29, 2017 (04:21 UTC)  (Read 10705 times)

Offline SmallKing

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Our familiar insider implies a successful launch
And official confirmed. Yaogan-30 01
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Offline input~2

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Official annoucement of launch success for Yaogan-30 group 01 "for electromagnetic detection and related technical tests"

http://news.xinhuanet.com/politics/2017-09/29/c_1121745112.htm [/font][/size]

Offline SmallKing

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Official annoucement of launch success for Yaogan-30 group 01 "for electromagnetic detection and related technical tests"

http://news.xinhuanet.com/politics/2017-09/29/c_1121745112.htm [/font][/size]
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Offline Galactic Penguin SST

Note that there is already a YG-30 launched in May 2016. It could be merely a muddling water designation, but it could also show some kind of relationship with that one.

Will be interesting to see what orbit do they end up with.....
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline SmallKing

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Some are bound for happiness, some are bound to glory, some are bound to live with less, who can tell your story?

Offline input~2

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Offline Galactic Penguin SST

Official photos from Xinhua:
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Offline input~2

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Online Phillip Clark

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Note that there is already a YG-30 launched in May 2016. It could be merely a muddling water designation, but it could also show some kind of relationship with that one.
Will be interesting to see what orbit do they end up with.....

Maybe the Chinese screwed up with the numbering system or mis-translated it into western numbers, and it should be Yaogan Weixing 31A, B and C?
« Last Edit: 09/29/2017 10:13 AM by Phillip Clark »

Offline starbase

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The animation from the CCTV13 video shows the probable triplet seperating.
« Last Edit: 09/29/2017 10:10 AM by starbase »

Offline Skyrocket

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Note that there is already a YG-30 launched in May 2016. It could be merely a muddling water designation, but it could also show some kind of relationship with that one.
Will be interesting to see what orbit do they end up with.....

Maybe the Chinese screwed up with the numbering system or mis-translated it into western numbers, and it should be Yaogan Weixing 31A, B and C?

I think this might be likely. I am not sure, if the triplet is on this single launch vehicle or if there will be three launches for three satellites. Lets see, how many objects will be tracked.

Offline input~2

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Offline Nordren

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Youtube clip of CCTV launch footage, separation, etc

Offline Galactic Penguin SST

Orbit data from NORAD:

42945/2017-058A: 592 x 601 km x 35.01 deg.
42946/2017-058B: 593 x 601 km x 35.00 deg.
42947/2017-058C: 593 x 601 km x 35.00 deg.
42948/2017-058D: 583 x 678 km x 34.93 deg. (rocket 2nd stage)

Had the orbit been 100 km lower I would have checked if the satellites are following the X-37B  ::), but what kind of satellites would use a 600 km, 35 deg. incl. orbit?  :-\
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline Galactic Penguin SST

Note that there is already a YG-30 launched in May 2016. It could be merely a muddling water designation, but it could also show some kind of relationship with that one.
Will be interesting to see what orbit do they end up with.....

Maybe the Chinese screwed up with the numbering system or mis-translated it into western numbers, and it should be Yaogan Weixing 31A, B and C?

I think this might be likely. I am not sure, if the triplet is on this single launch vehicle or if there will be three launches for three satellites. Lets see, how many objects will be tracked.

Yeah the announcement of the Chinese Academy of Sciences' Small Satellite Center as the contractor of the satellites and the emphasis on "electromagnetic environment research" points further away from linkage with YG-30 (the latter was built by CAST/DFH and was announced to be for "land survey/disaster relief" usage). ;)
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online Satori

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Exact launch time 04:21:05(?).31?UTC

Offline gosnold

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Orbit data from NORAD:

42945/2017-058A: 592 x 601 km x 35.01 deg.
42946/2017-058B: 593 x 601 km x 35.00 deg.
42947/2017-058C: 593 x 601 km x 35.00 deg.
42948/2017-058D: 583 x 678 km x 34.93 deg. (rocket 2nd stage)

Had the orbit been 100 km lower I would have checked if the satellites are following the X-37B  ::), but what kind of satellites would use a 600 km, 35 deg. incl. orbit?  :-\

High-revisit ship tracking over the Pacific:

Online zubenelgenubi

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Orbit data from NORAD:

42945/2017-058A: 592 x 601 km x 35.01 deg.
42946/2017-058B: 593 x 601 km x 35.00 deg.
42947/2017-058C: 593 x 601 km x 35.00 deg.
42948/2017-058D: 583 x 678 km x 34.93 deg. (rocket 2nd stage)

Had the orbit been 100 km lower I would have checked if the satellites are following the X-37B  ::), but what kind of satellites would use a 600 km, 35 deg. incl. orbit?  :-\

High-revisit ship tracking over the Pacific:

What functionality does this possibility provide that the Chinese "NOSS-triplet" constellation analogue does not?
(JB-8 satellite series = Yaogan 9, 16, 17, 20, and 25)

EDIT for clarity and spelling
« Last Edit: 09/30/2017 11:37 AM by zubenelgenubi »
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Online Phillip Clark

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If these were imaging satellites then the obvious answer would be "ground resolution".

Offline Star One

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Janes Defence article on this launch.

Quote
While official statements following Chinese satellite launches usually ascribe functions such as scientific research, land resource surveys, crop yield studies, and disaster relief, the Yaogan satellite series is assessed to include high-resolution optical imaging sensors, synthetic aperture radars, and electronic intelligence (ELINT) sensors for intelligence, surveillance, and reconnaissance (ISR).

The latest satellites appear to have been deployed as a triplet group, which is similar to the Yaogan 16, 17, 20, and 25 satellites, which were also deployed as triplets (for example Yaogan 16A, 16B, and 16C).

Their function is assessed to be for ELINT in support of maritime surveillance, not only in terms of detecting transmissions from a ship's radars but also for providing geolocation of the emitter by measuring the time difference in arrival of the intercepted signals at each of the satellites.

http://www.janes.com/article/74547/china-launches-three-more-yaogan-satellites