Author Topic: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)  (Read 5576 times)

Offline Steven Pietrobon

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #20 on: 12/24/2018 09:16 pm »
For some reason, I'm getting high resolution for this video. Normally, the resolution is pretty low.

http://m.news.cctv.com/2018/12/25/ARTIXhhqpVi2avDLplwtGMNO181225.shtml
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline russianhalo117

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #21 on: 12/24/2018 09:33 pm »
For some reason, I'm getting high resolution for this video. Normally, the resolution is pretty low.

http://m.news.cctv.com/2018/12/25/ARTIXhhqpVi2avDLplwtGMNO181225.shtml
Same to. Maybe the updated their video cameras at the LCC.

Offline Galactic Penguin SST

Launch announcement on sina.com.cn

https://news.sina.com.cn/o/2018-12-25/doc-ihqhqcir9964116.shtml

edit: and xinhua:

http://www.xinhuanet.com/politics/2018-12/25/c_1123898595.htm

Probably Y16, I'm guessing?

Turns out to be Y17. (maybe Y16 is for the last BDS-2 satellite launch rumored next month?)

Also some more photos (Wang Yulei/Xinhua) - interesting to see that these guys have given up stating any  "mission purpose" for this one in the official launch notice.  ;)
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline Josh_from_Canada

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #23 on: 01/01/2019 05:15 pm »
Now in GEO at 58.9E.

A third object (also in GEO) was also catalogued as 43917.

https://twitter.com/planet4589/status/1080138724111990785

Offline Galactic Penguin SST

From public reports, SAST is the satellite builder - and so far every GEO satellite they built aren't for communications (except for TJS-2 as claimed :ahem:).

There's a public paper showing plans for an all elecric propulsion SAST-5000 based satellite, with the mass given as 2.7 tonnes - which fits with the rocket used.

This news article mentions the satellite will test "double satellites co-position communications" as well as "multi-frequency & high speed communications". This sounds awfully like a "proximity operations" satellite so watch out for it!  ;)
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline Liss

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #25 on: 01/02/2019 09:29 am »
There's a public paper showing plans for an all elecric propulsion SAST-5000 based satellite, with the mass given as 2.7 tonnes - which fits with the rocket used.
Fast transfer from GTO to GEO (5 days max) doesn't fit to an all-electric platform.
This message reflects my personal opinion based on open sources of information.

Offline input~2

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #26 on: 01/02/2019 10:06 am »
TJS-3 is currently about 950 km away from WGS-2

Online Phillip Clark

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #27 on: 01/02/2019 10:20 am »
China's "Prowler"? ;)
I've always been crazy but it's kept me from going insane - WJ.

Offline Josh_from_Canada

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #28 on: 01/02/2019 05:01 pm »
There's a public paper showing plans for an all elecric propulsion SAST-5000 based satellite, with the mass given as 2.7 tonnes - which fits with the rocket used.
Fast transfer from GTO to GEO (5 days max) doesn't fit to an all-electric platform.

Maybe the electric propulsion would just be used for station keeping in the GEO belt.
And maybe object 43917 was an apogee motor to get it to GEO.
« Last Edit: 01/02/2019 09:19 pm by Josh_from_Canada »

Offline input~2

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #29 on: 01/02/2019 09:15 pm »
And maybe object 43917 was an apogee motor to get it to GEO.
SpaceTrack thinks the same as you do and calls it "TJS-3 AKM"

Offline input~2

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #30 on: 01/03/2019 09:55 pm »
Well, Object C/2018-110C/43917 appears to have performed some maneuvers and is now geostationnary at 59.07 ie 0.14 East from TJS-3, a distance of about 100 km
Could Object C be involved in "co-located satellite communications" (卫星主要用于开展双星共位通信) ?

Offline input~2

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #31 on: 01/05/2019 09:06 pm »
Object C is slowly drifting West, so that its distance to TJS-3 could at this time (Jan 5, 22:00 UTC) be down to 58 km


Offline input~2

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Re: TJS-3 - CZ-3C/G2 - XSLC - December 24, 2018 (16:53 UTC)
« Reply #33 on: 01/06/2019 04:44 pm »
Object C is slowly drifting West, so that its distance to TJS-3 could at this time (Jan 5, 22:00 UTC) be down to 58 km

With TLEs available only today (my local  time) for Object C at epoch Jan 4 and 5, it appears that its drift was reduced and the distance between the two objects was 92 km as of January 5 at 15:32 UTC

Online Olaf

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Online Olaf

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Tags: TJS-3 CZ-3C/G2 XSLC