Author Topic: Yaogan 29 (YG-29) - CZ-4C- TSLC - November 26, 2015 (21:24 UTC)  (Read 9239 times)

Offline beidou

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« Last Edit: 11/27/2015 05:24 AM by Galactic Penguin SST »

Offline Satori

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Can some of our Chinese speaking friends see the conversation that is going on on the 9ifly Chinese space forum about this launches?

Thank you!

Offline beidou

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Can some of our Chinese speaking friends see the conversation that is going on on the 9ifly Chinese space forum about this launches?

Thank you!

Likely this launch is going to be from TSLC, not JSLC. That's all I can tell.

Offline Satori

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Can some of our Chinese speaking friends see the conversation that is going on on the 9ifly Chinese space forum about this launches?

Thank you!

Likely this launch is going to be from TSLC, not JSLC. That's all I can tell.

Are they talking about a possible suborbital launch from Jiuquan?

Offline beidou

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Can some of our Chinese speaking friends see the conversation that is going on on the 9ifly Chinese space forum about this launches?

Thank you!

Likely this launch is going to be from TSLC, not JSLC. That's all I can tell.

Are they talking about a possible suborbital launch from Jiuquan?
No, I have no ideas whether there will be a suborbital from Jiuquan.

Offline Satori

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Re: Gaofen-10 (GF-10) - CZ-4C- TSLC - 2016
« Reply #5 on: 11/23/2015 05:35 PM »
Likely this will be deferred to 2016.

Do you have any source for this?

Offline beidou

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Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #6 on: 11/26/2015 11:00 PM »
Launch succeeded!! More info to be followed. Best gifts for thanksgiving:)
« Last Edit: 11/26/2015 11:23 PM by beidou »

Offline beidou

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Offline Chris Bergin

Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #8 on: 11/26/2015 11:44 PM »
Launch succeeded!! More info to be followed. Best gifts for thanksgiving:)

Surprise launch!

Ok, so I need some help as Rui will be in bed! ;D

It's a Yaogan Weixing satellite, right? I see via the translation the rocket and launch site, but can we work out a UTC T-0 for 5:24 local time?

Offline astropl

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Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #9 on: 11/26/2015 11:52 PM »


Long March 4C, right - and from which launch site? Oh and we'll need a T-0.

LC9, 21:24 UT.
Waldemar Zwierzchlejski (astropl)
http://lk.astronautilus.pl

Offline Chris Bergin

Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #10 on: 11/26/2015 11:52 PM »


Long March 4C, right - and from which launch site? Oh and we'll need a T-0.

LC9, 21:24 UT.

Awesome, I edited my post as I see some details now, but thanks for the UTC and pad! :)


Offline jcm

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Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #12 on: 11/27/2015 12:25 AM »
Cataloged as 41038 in a 615 x 619 km x 97.8 deg sunsync orbit with 0430 local time node.
Rocket stage in 483 x 621 km.

This is the same profile as the Jianbing-5 radar satellites (Yaogan 1, 3, 10 )
although they all had 0600 local time nodes. I think this is a radar satellite, most likely
another JB-5 or a successor generation.
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Offline jcm

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Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #13 on: 11/27/2015 12:32 AM »
Oh, and the Xinhua link seems to confirm that not only the LV (CZ-4C) but also the payload is a SAST (Shanghai) project, like the earlier JB-5 and JB-7 radar sats
« Last Edit: 11/27/2015 12:35 AM by jcm »
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Online Galactic Penguin SST

Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #14 on: 11/27/2015 02:43 AM »
Urghhhh I knew from rumors that there would be a launch from that very pad in late November (with someone even guessing the payload as a radar sat something like what launched hours ago!), but the pre-launch confirmation never came.  :(

Cataloged as 41038 in a 615 x 619 km x 97.8 deg sunsync orbit with 0430 local time node.
Rocket stage in 483 x 621 km.

This is the same profile as the Jianbing-5 radar satellites (Yaogan 1, 3, 10 )
although they all had 0600 local time nodes. I think this is a radar satellite, most likely
another JB-5 or a successor generation.

This link actually claims the satellite has 0.5 m resolution and an imaging swap width 6 times of its predecessors.  ;)
« Last Edit: 11/27/2015 02:53 AM by Galactic Penguin SST »
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline jcm

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Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #15 on: 11/27/2015 03:01 AM »

[
This link actually claims the satellite has 0.5 m resolution and an imaging swap width 6 times of its predecessors.  ;)

Yes, although that could refer to either an optical or a radar sat.
 
(btw, it's  "swath width", not "swap width" )
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Offline Lsquirrel

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Re: Yaogan 29 (YG-29) CZ-4C- TSLC - Nov 26th, 2015
« Reply #16 on: 11/27/2015 11:37 AM »
Urghhhh I knew from rumors that there would be a launch from that very pad in late November (with someone even guessing the payload as a radar sat something like what launched hours ago!), but the pre-launch confirmation never came.  :(

Cataloged as 41038 in a 615 x 619 km x 97.8 deg sunsync orbit with 0430 local time node.
Rocket stage in 483 x 621 km.

This is the same profile as the Jianbing-5 radar satellites (Yaogan 1, 3, 10 )
although they all had 0600 local time nodes. I think this is a radar satellite, most likely
another JB-5 or a successor generation.

This link actually claims the satellite has 0.5 m resolution and an imaging swap width 6 times of its predecessors.  ;)

0.5 m resolution,a inpressive specification!

Offline Satori

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Launch time of 2124:04.681UTC

Offline input~2

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Offline input~2

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CZ-4C 1st stage debris were recovered near Xiangkou village (330552N1101613E) Hubei province
source

Offline Lewis007

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Offline Targeteer

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Cataloged as 41038 in a 615 x 619 km x 97.8 deg sunsync orbit with 0430 local time node.
Rocket stage in 483 x 621 km.

This is the same profile as the Jianbing-5 radar satellites (Yaogan 1, 3, 10 )
although they all had 0600 local time nodes. I think this is a radar satellite, most likely
another JB-5 or a successor generation.

What would be the advantage or reason to launch a radar satellite into a sun-synch orbit?  Discussions about the advantages of sun synch for visible imagery talk about shadows and other aspects that wouldn't seem applicable with radar.  Wouldn't inconsistent pass times be desirable for non-visible imaging to complicate denial efforts?
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline edkyle99

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Cataloged as 41038 in a 615 x 619 km x 97.8 deg sunsync orbit with 0430 local time node.
Rocket stage in 483 x 621 km.

This is the same profile as the Jianbing-5 radar satellites (Yaogan 1, 3, 10 )
although they all had 0600 local time nodes. I think this is a radar satellite, most likely
another JB-5 or a successor generation.

What would be the advantage or reason to launch a radar satellite into a sun-synch orbit?  Discussions about the advantages of sun synch for visible imagery talk about shadows and other aspects that wouldn't seem applicable with radar.  Wouldn't inconsistent pass times be desirable for non-visible imaging to complicate denial efforts?
My guess would be power.  A satellite can always receive solar power in a sun sync orbit, and radar-sats need lots of power.

 - Ed Kyle

Offline input~2

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CZ-4C fairing debris smashed the roof of a building in Sihe village industrial park (292256N1091912E), Hubei province.
No casualty reported
source: http://www.weibo.com/p/1005055659122296http://www.weibo.com/u/2561235112

Offline input~2

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Deployment of (presumably) the solar array was in progress 1min 55 sec after S/C separation

Offline limen4

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Offline Steven Pietrobon

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Thanks limen4. That seems to confirm that Yaogan 29 is a radar bird.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Skyrocket

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And it, if the illustration is correct, appears to be a different bird than the Yaogan-1/JB-5 type

Offline input~2

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and an illustration of the satellite (is that a SAR deployable antenna on top?)
Thanks limen4, looks like the yellow area on the satellite illustration was indeeed a SAR deployable antenna

Offline Liss

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Quote
This link actually claims the satellite has 0.5 m resolution and an imaging swap width 6 times of its predecessors.  ;)
Is it correct to describe the source as a social network account associated to spacechina.com -- and to say that this claim never came beyond this source into more official media?
« Last Edit: 12/14/2015 09:13 PM by Liss »
This message reflects my personal opinion based on open sources of information.

Offline Phillip Clark

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Has there been any indication of the Jianbing designator for this satellite, please?

Offline input~2

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Has there been any indication of the Jianbing designator for this satellite, please?
Could be Jianbing 5#4
(see http://www.eastpendulum.com/les-satellites-chinois-et-la-surveillance-maritime )

Offline Phillip Clark

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Has there been any indication of the Jianbing designator for this satellite, please?
Could be Jianbing 5#4
(see http://www.eastpendulum.com/les-satellites-chinois-et-la-surveillance-maritime )

The artist's impressions shown above indicate it's a different design to the Jianbing-5 series: of course it might be a second generation Jianbing-5 satellite, but the new design suggests a new Jianbing designator.

Offline input~2

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Has there been any indication of the Jianbing designator for this satellite, please?
Could be Jianbing 5#4
(see http://www.eastpendulum.com/les-satellites-chinois-et-la-surveillance-maritime )

The artist's impressions shown above indicate it's a different design to the Jianbing-5 series: of course it might be a second generation Jianbing-5 satellite, but the new design suggests a new Jianbing designator.
JB-13#1?

Offline Phillip Clark

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JB-13 would be the logical designator since it's the next one that's unused, but since when have the Chinese been so logical? ;)

Offline gosnold

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Has there been any indication of the Jianbing designator for this satellite, please?
Could be Jianbing 5#4
(see http://www.eastpendulum.com/les-satellites-chinois-et-la-surveillance-maritime )

I put Yaogan 29 in the JB-5 category because it had a similar orbit to previous JB-5s, and it was also Gunter's classification at the time I think. However given the launch date and the picture above, it's probably a quite different satellite from the first JB-5. At least it's got to be more modern technology, even if it serves a similar purpose. It's very likely it has a new JB designator, but since I could not find it I kept JB-5.

By the way there's an English version of this article:
https://satelliteobservation.wordpress.com/2016/09/20/the-chinese-maritime-surveillance-system/
« Last Edit: 05/21/2017 09:17 PM by gosnold »

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