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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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