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RSW (1 & 2), TJSW - CZ-2C/YZ-1S - Jiuquan - 24 August 2021 (11:15 UTC)
by
zubenelgenubi
on 10 Aug, 2021 20:50
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Hulianwang (spelling?) Ronghe Weixing pair = Internet (Fusion or Convergence) Satellite Test Double Star
HWR? pair = IFTS pair
First flight on DFH-4L platform of the General Department of Communications and Navigation Satellites of the Fifth Academy
LongMarch-2C Y51 to launch from Jiuquan LC-94.
Launching to a SSO (Sun-Synchronous Orbit)
I'm reading the
spaceflightfans.cn listing via Google Translate.
A discussion has begun on 9ifly
(link), including some possible relation to the Hongyan constellation and a corresponding new satellite bus, DFH-4L. (also Google Translate)
(Viewing the thread as a not-logged-in person, I see two big contributors' posts are banned, including the OP? Blocked content is visible inside post quotes.)
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#1
by
Galactic Penguin SST
on 16 Aug, 2021 16:03
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A cursory check for potential NOTAMs/marine space closure notices for SSO and lower inclination flight paths yields nothing, nor were there any news that indicates this launch,
however people at at least one forum still indicates that this might be launching
sometime tomorrow.
I wonder, I wonder….
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#2
by
input~2
on 17 Aug, 2021 12:49
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#3
by
zubenelgenubi
on 20 Aug, 2021 05:19
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Launch postponed to August 21, same source.
Launch postponed to August 20 according to spaceflightfans
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#4
by
Fmedici
on 21 Aug, 2021 10:19
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#5
by
Galactic Penguin SST
on 21 Aug, 2021 11:52
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#6
by
input~2
on 21 Aug, 2021 14:27
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#7
by
input~2
on 21 Aug, 2021 20:19
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NOTAM for a launch from Jiuquan for SSO on August 24 before 11:20 UTC (does not seem to correspond to HWR which was planned for a 50° inclination orbital plane) - could indicate reentry of an upper stage
F2622/21 - CHINESE AEROSPACE FLIGHT ACTIVITIES WILL TAKE PLACE
FLW RECEIVED FROM CIVIL AVIATION ADMINISTRATION OF CHINA:
DUE TO AEROSPACE FLIGHT ACTIVITIES, THE FLIGHT SAFETY OF THE AIRCRAFT
IN THE FOLLOWING AREA MAY BE AFFECTED:
S40 32 47 E100 38 33
S40 32 58 E 099 28 41
S36 08 47 E 099 31 11
S36 08 38 E 100 37 45
3820S10030E 140. SFC - UNL, 24 AUG 11:22 2021 UNTIL 24 AUG 12:47 2021. CREATED:
20 AUG 18:26 2021
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#8
by
Liss
on 21 Aug, 2021 21:53
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Looks to be a polar orbit, not an SSO.
Reminds of KL-Alpha and KL-Beta 89° orbits.
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#9
by
zubenelgenubi
on 21 Aug, 2021 23:07
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Cross-post re:
HWR orbit:
NOTAM for a launch from Jiuquan for polar orbit on August 24 before 11:20 UTC (does not seem to correspond to HWR which was planned for a 50° inclination orbital plane) - could indicate reentry of an upper stage
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#10
by
Galactic Penguin SST
on 22 Aug, 2021 14:15
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Looks to be a polar orbit, not an SSO.
Reminds of KL-Alpha and KL-Beta 89° orbits.
I think this and the rumored LM-2C/YZ-1S launch with double CAST test satellites for the Chinese National LEO comsat constellation (GW) are one and the same (there was a source that indicated it was delayed to "the night of the 24th LT").
Iridium also used 86.4 deg. orbits IIRC.
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#11
by
Josh_from_Canada
on 22 Aug, 2021 21:15
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9ifly thinks this NOTAM is for the HWR CZ-2C/YZ-1S mission that we currently have a separate thread for.
edit: Spaceflightfans.cn agrees with 9ifly and lists the CZ-2C flight for the same time that the above NOTAM is active.
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#12
by
zubenelgenubi
on 22 Aug, 2021 21:26
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Input's post up-thread states that the two Jiuquan launches are to very different orbital inclinations. (This one polar, the other one 50 degrees)
Could someone find and post the other NOTAM or set of NOTAM's?
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#13
by
Galactic Penguin SST
on 22 Aug, 2021 23:05
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Input's post up-thread states that the two Jiuquan launches are to very different orbital inclinations. (This one polar, the other one 50 degrees)
Could someone find and post the other NOTAM or set of NOTAM's?
There wasn’t and the 50 deg. was just a guess by spaceflightfans.cn . I think those two threads can be merged.
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#14
by
Conexion Espacial
on 24 Aug, 2021 00:02
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The launch will be carried out by the Long March 2C rocket in its YZ-1S variant which is a three-stage rocket where "YZ-1S" refers to the third stage called "Yuanzheng-1S", this stage uses the YF-50D engine which has the ability to restart itself to allow delivery of payloads to higher orbits such as Polar, GEO, MSO, among others. The three stages of the vehicle use Dinitrogen Tetroxide (N²O⁴) and Asymmetric Dimethylhydrazine (UDMH) as propellant. Thanks to this third stage the rocket can have an additional 315.5 seconds ignition to put payloads into their program orbit. The Long March-2C is capable of carrying 1.2 tons to a Sun-synchronous orbit of 700 kilometers, but with the upper stage the payload capacity increases to two tons.
More details
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#15
by
Conexion Espacial
on 24 Aug, 2021 11:14
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Another representation of the Yuanzheng-1S upper stage that will be used in today's launch, this view shows the adapter at the top where the payload is housed and also the YF-50D engine.
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#16
by
Conexion Espacial
on 24 Aug, 2021 11:42
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Due to the orbit and the characteristics of the Yuanzheng-1S stage (which has a lifetime of 70 minutes), launch confirmation may take more than an hour.
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#17
by
Conexion Espacial
on 24 Aug, 2021 12:25
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Launch Confirm!
T-0: 11:15 UTC
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#18
by
Galactic Penguin SST
on 24 Aug, 2021 12:26
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The 3 satellites are known as "Ronghe Shiyan Weixing" (RSW) = "Integrated Experimental Satellite"
NOTE: 3 satellites, not 2, are on board.
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#19
by
Conexion Espacial
on 24 Aug, 2021 12:35
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#20
by
Liss
on 24 Aug, 2021 12:42
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#21
by
eeergo
on 24 Aug, 2021 12:49
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Launch Confirm!
T-0: 11:15 UTC
Interesting-looking head fairing! It even looks a different shade of white, somewhat ivory. I guess it's carbon composite and probably features a different paintjob than the metallic legacy fairings?
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#22
by
Galactic Penguin SST
on 24 Aug, 2021 13:07
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#23
by
otter
on 24 Aug, 2021 13:10
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http://www.news.cn/english/2021-08/24/c_1310146039.htmChina launches two experimental satellites
Source: Xinhua| 2021-08-24 20:41:19
JIUQUAN, Aug. 24 (Xinhua) -- China successfully sent two experimental satellites into planned orbit on Tuesday.
A Yuanzheng-1 (Expedition-1) upper stage aboard a Long March-2C carrier rocket blasted off from the Jiuquan Satellite Launch Center in northwest China at 7:15 p.m. (Beijing Time), carrying the experimental satellites.
The launch was the 385th mission for the Long March series carrier rockets.
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#24
by
Conexion Espacial
on 24 Aug, 2021 13:22
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Launch Confirm!
T-0: 11:15 UTC
Interesting-looking head fairing! It even looks a different shade of white, somewhat ivory. I guess it's carbon composite and probably features a different paintjob than the metallic legacy fairings?
This is a new fairing for this rocket, it is 4.2m in diameter, similar to the new fairing that has recently been used on the Long March 2C and other launchers.
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#25
by
Conexion Espacial
on 24 Aug, 2021 13:25
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In https://weibo.com/5386897742/KuYgPrAzv?from=page_1001065386897742_profile&wvr=6&mod=weibotime , they count three satellites.
Hmm, initial news articles have the number of satellites at 2, and the LCC screen also says 2 satellites. Yet later news articles has the number at 3...
Also this article says this is the 79th CZ-2C launch, which obviously include sub-orbital ones. Does that fit with your records?
CZ-2C s/n Y51 & YZ-1S s/n Y2 was used for this launch.
According to the information, three satellites were launched, two by CASC and one by Our Space.
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#26
by
Satori
on 24 Aug, 2021 13:25
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#27
by
Liss
on 24 Aug, 2021 13:35
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Also this article says this is the 79th CZ-2C launch, which obviously include sub-orbital ones. Does that fit with your records?
The latest one, on July 19, was announced to be the 77th (and 61st orbital since 1974).
This one is called 79th (and 62nd orbital since 1974).
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#28
by
Liss
on 24 Aug, 2021 13:40
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In https://weibo.com/5386897742/KuYgPrAzv?from=page_1001065386897742_profile&wvr=6&mod=weibotime , they count three satellites.
Hmm, initial news articles have the number of satellites at 2, and the LCC screen also says 2 satellites. Yet later news articles has the number at 3...
Maybe they were also counting the YS-1S upper stage as a payload.
Nope, the third one is a communication technology test satellite (通信技术试验卫星) developed by the Aerospace Dongfanghong Satellite Co. Ltd.
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#29
by
Galactic Penguin SST
on 24 Aug, 2021 13:47
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In https://weibo.com/5386897742/KuYgPrAzv?from=page_1001065386897742_profile&wvr=6&mod=weibotime , they count three satellites.
Hmm, initial news articles have the number of satellites at 2, and the LCC screen also says 2 satellites. Yet later news articles has the number at 3...
Maybe they were also counting the YS-1S upper stage as a payload.
Nope, the third one is a communication technology test satellite (通信技术试验卫星) developed by the Aerospace Dongfanghong Satellite Co. Ltd.
After reading Chinese articles it looks like the 3 satellites include RSW-01/02 built by CAST and the one you mentioned which is built by DFH Satellite Co., a subsidiary of CAST?
Even I am confused, and there’s TJSW-7 coming soon (which TJSW stands for “communication technology experimental satellite”)!
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#30
by
Liss
on 24 Aug, 2021 13:58
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After reading Chinese articles it looks like the 3 satellites include RSW-01/02 built by CAST and the one you mentioned which is built by DFH Satellite Co., a subsidiary of CAST?
Even I am confused, and there’s TJSW-7 coming soon (which TJSW stands for “communication technology experimental satellite”)!
Exactly. And a good point is yours -- it seems we will have two totally different TJSWs in orbit in one day.
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#31
by
Liss
on 24 Aug, 2021 14:05
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Meanwhile English edition of Xinhua knows of only two satellites:
http://www.news.cn/english/2021-08/24/c_1310146039.htmChina launches two experimental satellites
Source: Xinhua| 2021-08-24 20:41:19|Editor: huaxia
JIUQUAN, Aug. 24 (Xinhua) -- China successfully sent two experimental satellites into planned orbit on Tuesday.
A Yuanzheng-1 (Expedition-1) upper stage aboard a Long March-2C carrier rocket blasted off from the Jiuquan Satellite Launch Center in northwest China at 7:15 p.m. (Beijing Time), carrying the experimental satellites.
The launch was the 385th mission for the Long March series carrier rockets. Enditem
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#32
by
Satori
on 24 Aug, 2021 14:23
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In https://weibo.com/5386897742/KuYgPrAzv?from=page_1001065386897742_profile&wvr=6&mod=weibotime , they count three satellites.
Hmm, initial news articles have the number of satellites at 2, and the LCC screen also says 2 satellites. Yet later news articles has the number at 3...
Maybe they were also counting the YS-1S upper stage as a payload.
Nope, the third one is a communication technology test satellite (通信技术试验卫星) developed by the Aerospace Dongfanghong Satellite Co. Ltd.
Ah, thank you for the note!
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#33
by
Conexion Espacial
on 24 Aug, 2021 14:30
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According to several reports, the CZ-2C/YZ-1S will be used for the satellite constellation missions as it is used today, it is also mentioned that each launch will send a total of 20 satellites which will be attached to the "bus" or "central trunk" and then delivered to the scheduled orbit, This is similar to the method used by OneWeb to launch its satellites, that said, it is possible that in the coming months we will see one or several launches of this constellation per month using mainly the CZ-2C/YZ-1S with the new fairing.
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#34
by
DatUser14
on 24 Aug, 2021 17:28
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#35
by
Conexion Espacial
on 24 Aug, 2021 17:32
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#36
by
starbase
on 24 Aug, 2021 17:34
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#37
by
jcm
on 24 Aug, 2021 18:57
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According to the information, three satellites were launched, two by CASC and one by Our Space.
Do you have a link for this? What is the Chinese version of "Our Space"?
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#38
by
Conexion Espacial
on 24 Aug, 2021 19:28
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According to the information, three satellites were launched, two by CASC and one by Our Space.
Do you have a link for this? What is the Chinese version of "Our Space"?
CASC mentions that three satellites were launched which are "communication technology test", regarding "Our Space", I may be wrong as I also read that it was DFH Satellite Co. or Aerospace Dongfanghong Satellite Co. Ltd.
https://mp.weixin.qq.com/s/xlbOlxLaFBqAq7D2sijHtA
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#39
by
Conexion Espacial
on 24 Aug, 2021 20:37
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#40
by
jcm
on 24 Aug, 2021 20:37
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According to the information, three satellites were launched, two by CASC and one by Our Space.
Do you have a link for this? What is the Chinese version of "Our Space"?
CASC mentions that three satellites were launched which are "communication technology test", regarding "Our Space", I may be wrong as I also read that it was DFH Satellite Co. or Aerospace Dongfanghong Satellite Co. Ltd.
https://mp.weixin.qq.com/s/xlbOlxLaFBqAq7D2sijHtA
I see. Your link here implies that all three sats were developed by CAST: 本次任务发射的3颗通信技术试验卫星，由中国航天科技集团有限公司五院研制，
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#41
by
Liss
on 24 Aug, 2021 20:42
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#42
by
Conexion Espacial
on 24 Aug, 2021 20:42
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I wonder if this kind of re-entries will be more normal after China starts launching its constellation of satellites, I would expect these satellites to be launched at least once a month, it all depends on how CASC plans to launch this constellation.
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#43
by
jcm
on 24 Aug, 2021 21:23
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#44
by
input~2
on 24 Aug, 2021 23:20
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#45
by
input~2
on 24 Aug, 2021 23:22
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3 objects cataloged so far:
2021-076A/49112 in 1082 x 1106 km x 86.41°
2021-076B/49113 in 1085 x 1109 km x 86.40°
2021-076C/49114 in 1085 x 1111 km x 86.40°
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#46
by
zubenelgenubi
on 25 Aug, 2021 01:46
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I wonder if this kind of re-entries will be more normal after China starts launching its constellation of satellites, I would expect these satellites to be launched at least once a month, it all depends on how CASC plans to launch this constellation.
If the YZ-1S deorbit burn is fully successful, and if they plan to use a re-entry area over a remote sea, maybe not. Re-entry would be visible, weather allowing, but there would likely be no one to see it.
What may become more common is seeing the deorbit burn and/or the YZ-1S excess propellant dump.
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#47
by
SciNews
on 25 Aug, 2021 05:16
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Launch video
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#48
by
Liss
on 25 Aug, 2021 07:02
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86.4° 1096 km
A DFH satellite info is from https://mp.weixin.qq.com/s/DYeIdIhJaLOndWH5pAjFsQ
Thanks. This link appears to have been deleted.
The original text with Google translation is as follows:
通信技术试验卫星发射任务圆满成功
The launch mission of the communication technology test satellite was a complete success
航天东方红 航天东方红卫星有限公司
Aerospace Dongfanghong Aerospace Dongfanghong Satellite Co., Ltd.
2021年8月24日，由航天科技集团五院航天东方红卫星有限公司抓总研制的通信技术试验卫星搭乘长征二号丙运载火箭，由酒泉卫星发射中心成功发射。随后，卫星太阳翼顺利展开，在轨运行稳定，状态良好，标志着卫星发射任务取得圆满成功。
On August 24, 2021, the communication technology test satellite developed by the Aerospace Dongfanghong Satellite Co., Ltd. of the Fifth Academy of CASC took the Long March 2C carrier rocket and was successfully launched by the Jiuquan Satellite Launch Center. Subsequently, the satellite solar wing unfolded smoothly, operating stably in orbit and in good condition, marking the complete success of the satellite launch mission.
该卫星主要用于开展通信技术试验任务。
The satellite is mainly used to carry out communication technology test missions.
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#49
by
Conexion Espacial
on 19 Sep, 2021 02:45
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