Author Topic: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012  (Read 41632 times)

Offline input~2

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #40 on: 04/30/2012 06:54 am »

In case you can't made it out, the dual launch support structure forms part of the fairing outer surface, similar to the SPLEDA system used on the Ariane 4 (as opposed to the SYLDA on the A-4/5).
This was "SPELDA"

Offline input~2

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #41 on: 04/30/2012 06:55 am »
Another video with some details on satellite deployment
http://video.sina.com.cn/p/news/c/v/2012-04-30/114161736803.html

Offline input~2

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #42 on: 04/30/2012 07:04 am »
Details of the 3700Z fairing which was used
(source: LM-3A series launch vehicle user's manual, issue 2011)
The pink part is the "adaptor"
« Last Edit: 04/30/2012 07:19 am by input~2 »

Offline input~2

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29, 2012
« Reply #43 on: 04/30/2012 01:45 pm »
A local government news release on the dropping of rocket stages over Tiandeng county in Guangxi province indicates that the launch will occur on April 30 at 4:50 am local time (20:50 UTC on April 29).

Source

Edit: Looks like it's the new drop zone for the four boosters (centered at the village of Huantun, near the town of Xiandu at 23.196937 N,106.939287 E). Distance from the pad to the center of the drop zone is 745 kilometers.
From NOTAMs, Huantun is located in the 1st stage drop zone rather than in the boosters drop zone.

Offline jcm

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #44 on: 04/30/2012 01:51 pm »
The CALT and Xinhua articles seem to refer to these satellites as "Beidou-2 No. 12 and 13"

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Offline input~2

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #45 on: 04/30/2012 03:27 pm »
The CALT and Xinhua articles seem to refer to these satellites as "Beidou-2 No. 12 and 13"
Yes and the simulation in the video calls them "MEO3" (separated first) and "MEO4"

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #46 on: 04/30/2012 06:35 pm »
Boosters debris were recovered near Longshuang village (N244035E1053413) and Mayao village (N243202E1053628)
No damage reported
(source)

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #47 on: 04/30/2012 06:51 pm »
Object C (2012-018C/38252) has been catalogued in 178 x 21615 km x 55.02, while at the same epoch (10s earlier) Object A was in 197 x 21592 km x 55.04

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #48 on: 05/01/2012 02:05 pm »
Object D (2012-018D/38253) has been catalogued, now in 199 x 21549 km x 55.05

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #49 on: 05/01/2012 02:25 pm »
Boosters debris were recovered near Longshuang village (N244035E1053413) and Mayao village (N243202E1053628)
No damage reported
(source)
Pictures of these boosters debris below:
near Longshuang (#10/11/12/13) and near Mayao (#14/15)
(source)

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #50 on: 05/01/2012 02:32 pm »
More pictures of both boosters debris at
http://gx.people.com.cn/n/2012/0501/c229260-16994985-1.html

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #51 on: 05/01/2012 03:00 pm »
One engine of the first stage apparently came to rest in a corn field in Tiandeng county (Guangxi province)
(source)
« Last Edit: 05/01/2012 07:33 pm by input~2 »

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #52 on: 05/01/2012 03:20 pm »
and we finally have Object B (2012-018B/38251) in 297 x 21566 km x 55.03

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #53 on: 05/02/2012 06:09 am »
AFAIU, CALT calls the SPELDA-like adaptor "dual satellite connecting external support structure" (双星串联外支撑结构) could be abbreviated as "DSCESS"
(source)
« Last Edit: 05/02/2012 06:18 am by input~2 »

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #54 on: 05/02/2012 08:36 pm »
A new launch video (without commercials! ;) )

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #55 on: 05/03/2012 01:23 pm »
Screenshots from CCTV7 launch report.
It can be seen that MEO3 was installed in the upper position under the fairing and was released first before the "DSCESS" and MEO4.

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #56 on: 05/04/2012 12:26 pm »

Offline jcm

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #57 on: 05/06/2012 09:46 pm »
AFAIU, CALT calls the SPELDA-like adaptor "dual satellite connecting external support structure" (双星串联外支撑结构) could be abbreviated as "DSCESS"
(source)

I'm not sure about the translation of 串联 (chuanlian) - possibly "serial" as opposed to "parallel" ?

I get   'shuanxing chuanlian wai zhicheng jiegou'  (SCWZJ) if you want to play that game (or if we are going to copy SPELDA, perhaps we should use French..)
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Offline jcm

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Re: Beidou-2, "Compass-M3&M4", CZ-3B, Xichang, April 29 2012
« Reply #58 on: 05/06/2012 09:47 pm »
The expected 4 objects (two Beidou, stage 3, adapter) are cataloged now.

 On May 6, A and B were still in the transfer
orbit and no new elements for C and D are available since May 1. It's
possible that C and D were really the payloads and have been temporarily
lost after their move to the expected circular orbit.
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Offline Galactic Penguin SST

AFAIU, CALT calls the SPELDA-like adaptor "dual satellite connecting external support structure" (双星串联外支撑结构) could be abbreviated as "DSCESS"
(source)

I'm not sure about the translation of 串联 (chuanlian) - possibly "serial" as opposed to "parallel" ?

I get   'shuanxing chuanlian wai zhicheng jiegou'  (SCWZJ) if you want to play that game (or if we are going to copy SPELDA, perhaps we should use French..)

Yup, chuanlian = connected in series (connected in parallel would be binglian 並联). That SCWZJ term literally means "dual satellite series connection outer support structure", so "DSSS" might be a good English translation.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

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