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Yaogan-21 & Tiantuo-2, Long March 4B, TSLC - September 8, 2014
by
beidou
on 10 Aug, 2014 09:17
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There will be another Yaogan satellite launch after YG-20.
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#1
by
Satori
on 10 Aug, 2014 10:29
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beidou, do you have any information about this mission?
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#2
by
beidou
on 10 Aug, 2014 19:29
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beidou, do you have any information about this mission?
I don't have any info, e.g. launch date and payload etc. yet. I indeed remember there was someone in 9ifly mentioned this mission will be in late this year, but I can't find the link now.
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#3
by
beidou
on 23 Aug, 2014 11:40
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#4
by
Galactic Penguin SST
on 06 Sep, 2014 01:28
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If the rumors are true we might see this going out of Taiyuan on a CZ-4B "within this weekend"! Someone please help to see if this clashes with AsiaSat 6....
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#5
by
Satori
on 06 Sep, 2014 15:10
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So this can be the second electro-optical 4th generation bird with a high-resolution IR payload and a Phoenix Eye-2 based bus?
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#6
by
Galactic Penguin SST
on 06 Sep, 2014 23:42
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So this can be the second electro-optical 4th generation bird with a high-resolution IR payload and a Phoenix Eye-2 based bus?
If you mean the same type of sat as YG-14, that's what I'm betting on as well. Only the aerospace divine and those working on it know the answers though, or whether they are launching within the next hours in order for people working on it to get back home just in time for Mid-Autumn Festival...
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#7
by
Chris Bergin
on 06 Sep, 2014 23:47
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If this launches over the next four/five hours, can someone PM me. Thanks!
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#8
by
Galactic Penguin SST
on 08 Sep, 2014 04:05
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Oh the Chinese broke the tradition and launched a Mid-Autumn Festival firework!
Apparently this was just launched successfully at 03:22 UTC along with Tiantuo 2, National University of Defense Technology (NUDT)'s second satellite. Waiting for details here....
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#9
by
Steven Pietrobon
on 08 Sep, 2014 05:28
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Thanks Galactic Penguin SST. That makes four launchers in less than a month!
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#10
by
Galactic Penguin SST
on 08 Sep, 2014 05:36
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So this can be the second electro-optical 4th generation bird with a high-resolution IR payload and a Phoenix Eye-2 based bus?
Looks like I was wrong - the launch time seems to put this as the third satellite in the YG-5 series, after
YG-5 and
YG-12...
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#11
by
Galactic Penguin SST
on 08 Sep, 2014 05:49
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So this can be the second electro-optical 4th generation bird with a high-resolution IR payload and a Phoenix Eye-2 based bus?
Looks like I was wrong - the launch time seems to put this as the third satellite in the YG-5 series, after YG-5 and YG-12...
NORAD's measurements of orbital elements confirms that:
40143/2014-053A: 476 x 493 km x 97.42°
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#12
by
input~2
on 08 Sep, 2014 05:59
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#13
by
input~2
on 08 Sep, 2014 06:02
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#14
by
input~2
on 08 Sep, 2014 06:07
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#15
by
Lsquirrel
on 08 Sep, 2014 06:17
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YG21 TLE：
edit by mod (TLE erased)
orbit derived from TLEs:
476 x 493 km x 97.42° (epoch: Sept 8, 0425UTC)
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#16
by
input~2
on 08 Sep, 2014 06:31
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the launch time seems to put this as the third satellite in the YG-5 series, after YG-5 and YG-12...
Could YG-21 be a replacement for YG-5 which
reentered last week?
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#17
by
input~2
on 08 Sep, 2014 07:09
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Object C has now been catalogued
2014-053C/40145 in 220 x 448 km x 97.51° (CZ-4B 3rd stage?)
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#18
by
Galactic Penguin SST
on 08 Sep, 2014 07:35
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the launch time seems to put this as the third satellite in the YG-5 series, after YG-5 and YG-12...
Could YG-21 be a replacement for YG-5 which reentered last week?
Based on the lifetimes of China's recon. birds, I would even say it's a replacement for YG-12....
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#19
by
Chris Bergin
on 08 Sep, 2014 09:00
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#20
by
Satori
on 08 Sep, 2014 09:38
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Exact launch time was 0322:05.053UTC.
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#21
by
Galactic Penguin SST
on 08 Sep, 2014 10:27
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About NUDT's Tiantuo 2: the micro-satellite carries a video camera for Earth observation - not unlike many similar satellites worldwide that flew....
Edit: More information from http://news.xinhuanet.com/2014-09/08/c_1112396523.htm:
Size: 515 x 524 x 685 mm
Weight: 67 kg
The satellite is equipped with 4 video cameras for live transmission and active tracking of Earth targets by real-time commands or remote controlling via the web.
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#22
by
input~2
on 08 Sep, 2014 10:48
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#23
by
jcm
on 08 Sep, 2014 13:37
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the launch time seems to put this as the third satellite in the YG-5 series, after YG-5 and YG-12...
Could YG-21 be a replacement for YG-5 which reentered last week?
Based on the lifetimes of China's recon. birds, I would even say it's a replacement for YG-12....
Agreed. Seems like the YG-5 series now supports 2 orbital planes. YG-14 is at 1400 local time
while YG-21 returns to the 1030 LT plane used by YG-5,12 and by the precursor ZY-2 satellites.
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#24
by
jcm
on 08 Sep, 2014 13:40
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YG-21 probably separated around 0335 UTC.
The third stage is in a 220 x 487 km orbit following a depletion burn at about 0343 UTC.
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#25
by
Skyrocket
on 08 Sep, 2014 15:37
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Agreed. Seems like the YG-5 series now supports 2 orbital planes. YG-14 is at 1400 local time
while YG-21 returns to the 1030 LT plane used by YG-5,12 and by the precursor ZY-2 satellites.
I do not think, that YG-14 is in the YG-5 series. Although the orbit is similar, the launch vehicle featured a larger fairing than YG-5, 12 and 21.
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#26
by
jcm
on 08 Sep, 2014 17:32
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Agreed. Seems like the YG-5 series now supports 2 orbital planes. YG-14 is at 1400 local time
while YG-21 returns to the 1030 LT plane used by YG-5,12 and by the precursor ZY-2 satellites.
I do not think, that YG-14 is in the YG-5 series. Although the orbit is similar, the launch vehicle featured a larger fairing than YG-5, 12 and 21.
Interesting. The fact that the same orbit, launch vehicle type and launch site is being used does suggest a relationship.
Perhaps a special modified YG-5? Future launches will be interesting to watch.
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#27
by
jcm
on 08 Sep, 2014 17:34
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Agreed. Seems like the YG-5 series now supports 2 orbital planes. YG-14 is at 1400 local time
while YG-21 returns to the 1030 LT plane used by YG-5,12 and by the precursor ZY-2 satellites.
I do not think, that YG-14 is in the YG-5 series. Although the orbit is similar, the launch vehicle featured a larger fairing than YG-5, 12 and 21.
Interesting. The fact that the same orbit, launch vehicle type and launch site is being used does suggest a relationship.
Perhaps a special modified YG-5? Future launches will be interesting to watch.
Also, YG-14 had the same RCS as YG-5. So a bit puzzling. The larger fairing can't be the secondary payload - it was
tinier than the one on YG-21.
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#28
by
Liss
on 08 Sep, 2014 18:01
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Agreed. Seems like the YG-5 series now supports 2 orbital planes. YG-14 is at 1400 local time
while YG-21 returns to the 1030 LT plane used by YG-5,12 and by the precursor ZY-2 satellites.
I do not think, that YG-14 is in the YG-5 series. Although the orbit is similar, the launch vehicle featured a larger fairing than YG-5, 12 and 21.
Interesting. The fact that the same orbit, launch vehicle type and launch site is being used does suggest a relationship.
Perhaps a special modified YG-5? Future launches will be interesting to watch.
Jonathan,
(1) Orbits were close but different. YG-5/12/21 were inserted into (480-484)x(491-494) km while YG-14 was launched into 470x474 km -- very visible difference against the closeness of three others.
(2) YG-14 was known to be first JB-10 satellite so it was not the same as YG-5/12/21. In fact, we do not know the JB designator for YG-5/12/21 -- they could retain JB-3 name from the ZY-2 series but it is not known for sure.
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#29
by
gwiz
on 08 Sep, 2014 18:41
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Size: 515 x 524 x 685 mm
These numbers describe a stretched cube and don't match the pictures which show a squashed cube.
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#30
by
Lewis007
on 09 Sep, 2014 07:48
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It took some searching on the net (using Chinese characters), but I finally found a launch video on YouTube (which is easier to download).
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#31
by
edkyle99
on 09 Sep, 2014 13:34
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A plague of banners on such TV broadcasts almost always covers the bottom section of the launch vehicle, rendering the video almost useless. India and China launch coverage both suffer from this problem.
- Ed Kyle
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#32
by
Lars_J
on 09 Sep, 2014 16:32
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A question - what is the red smoke that comes off the first stage in some of the launch pictures? I have noticed similar things from Proton launches, so is this something intrinsic to do with the storable propellant that is used in both launch vehicles?
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#33
by
Skyrocket
on 09 Sep, 2014 16:54
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A question - what is the red smoke that comes off the first stage in some of the launch pictures? I have noticed similar things from Proton launches, so is this something intrinsic to do with the storable propellant that is used in both launch vehicles?
Venting from the Dinitrogentetroxide (N2O4) oxidizer tanks.
https://en.wikipedia.org/wiki/Dinitrogen_tetroxide
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#34
by
Satori
on 12 Sep, 2014 13:54
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#35
by
input~2
on 28 Sep, 2014 15:10
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