Author Topic: BeiDou-3 I2-S, CZ-3B, XSLC, September 29, 2015 (23:13 UTC)  (Read 18684 times)

Offline beidou

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Per information from 9iFly. This is purely a speculation, no concrete information source yet.
« Last Edit: 10/04/2015 08:25 pm by beidou »

Offline beidou

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Very likely this will be a IGSO satellite, with a launch mass of 4.2 metric tone.

Offline Skyrocket

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Very likely this will be a IGSO satellite, with a launch mass of 4.2 metric tone.

Really an IGSO? Are there two different IGSO designs, as the first 3rd generation IGSO was a smaller design launched on a CZ-3C/YZ version.

Offline beidou

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Very likely this will be a IGSO satellite, with a launch mass of 4.2 metric tone.

Really an IGSO? Are there two different IGSO designs, as the first 3rd generation IGSO was a smaller design launched on a CZ-3C/YZ version.

Yes, there are two designs by two different manufactures. The smaller one is designed by CAS while this heavier one is designed by CASC. Apparently, the Chinese government wanted to introduce competitions for building BeiDou satellites, just like the "Boeing-LM" pattern for GPS. Similar to the satellite bus, there are also more than one contractors building the atomic clocks flying on the satellites.

Online Galactic Penguin SST

Very likely this will be a IGSO satellite, with a launch mass of 4.2 metric tone.

Really an IGSO? Are there two different IGSO designs, as the first 3rd generation IGSO was a smaller design launched on a CZ-3C/YZ version.

I don't think it has been confirmed yet, but there are indeed rumors that both CAS and CAST will provide some of the BDS geosynchronous/geostationary satellites. Alas, the info above is just a rumor and I have yet to see a definite source that explicitly claims the above information.

I guess we will have to wait for more info about that.  :-X

P.S. The launch date listed is just a slightly educated guess - there has been nothing that actually points to an August launch, but the shortlist for the next launch out of Xichang is pretty short....
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Offline beidou

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« Last Edit: 09/02/2015 06:18 pm by beidou »

Offline beidou

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There will be another launch from Xichang in late September, this mission will carry a classified payload,
as indicated by people familiar with this matter.
« Last Edit: 09/20/2015 11:56 am by beidou »

Offline Phillip Clark

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There will be another launch from Xichang in late September, this mission will carry a secretive payload,
as indicated by people familiar with this matter.

Oh goody!   This is like the 1970s again when we were guessing what their satellites were really doing. ;)
I've always been crazy but it's kept me from going insane - WJ.

Offline beidou

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Oh goody!   This is like the 1970s again when we were guessing what their satellites were really doing. ;)

My understanding is that we don't need to know what the satellites are doing for classified payloads, this principle applies to the U.S. missions too.

Online Galactic Penguin SST

Hmm.....the second launch out of Xichang this month is towards a 55 degree-ish inclination orbit, and will happen at morning local time.....is it BDS MEO/IGSO after all?

A2740/15 - A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED BY:N2417E10608-N2446E10541-N2435E10528-N2407E10555 BACK TO START. VERTICAL LIMITS:GND-UNL. GND - UNL, 29 SEP 23:05 2015 UNTIL 29 SEP 23:47 2015. CREATED: 24 SEP 06:47 2015

Launch time is ~23:15 UTC on September 29.
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Offline input~2

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and also this one:
A2741/15 -  A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED BY:N1807E11151-N1845E11119-N1818E11043-N1740E11115 BACK TO START. VERTICAL LIMITS:GND-UNL. GND - UNL, 29 SEP 23:08 2015 UNTIL 30 SEP 00:03 2015. CREATED: 24 SEP 06:48 2015


Edit: A2740/15 & A2741/15 are practically identical to A2042/2015 & A2043/2015 for M1-S/M2-S launched on July 24 with CZ-3B/YZ-1
« Last Edit: 09/24/2015 07:35 pm by input~2 »

Offline beidou

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I will be very surprised if this launch is a dual-MEO mission.

Offline Chris Bergin



Launch time is ~23:15 UTC on September 29.

I hate it when people ask if something is still on target? (Because someone would have said otherwise on the thread), but..........is this one still on target? ;D
« Last Edit: 09/29/2015 11:45 am by Chris Bergin »
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Offline SmallKing

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Offline input~2

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Re: BeiDou-3 I2-S, CZ-3B, Xichang, Sept 29, 2015 (23:13 UTC)
« Reply #14 on: 09/29/2015 04:27 pm »
is this one still on target?
Apparently yes: NOTAMs are still active and SmallKing told us that launch of [CZ-3B] will take place tonight at 23:13 UTC with the second inclined GSO member of the Beidou-3 constelllation, called Beidou 3 I2-S

Online Galactic Penguin SST

Nothing seen about this launch so far, but the sun has only just risen at the launch site so I'm not too surprised. I'm waiting for reports of college freshman students rushing out of their breakfast tables.....  :P
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Offline Satori

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Re: BeiDou-3 I2-S, CZ-3B, Xichang, Sept 29, 2015 (23:13 UTC)
« Reply #16 on: 09/29/2015 11:13 pm »
This is the unofficial launch time. Standing by for news from Xichang.

Online Galactic Penguin SST

"Liftoff confirmed."

"Copy liftoff."


 ;)
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Offline Chris Bergin

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Online Galactic Penguin SST

Rui's article! :)
http://www.nasaspaceflight.com/2015/09/chinese-long-march-3b-lofts-next-beidou-3-satellite/

If you want bystander photos, take a look at this. (there are also others seeing the max-Q contrail too)

Liftoff seems to be closer to 23:15 UTC according to local reports.
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