China - NON-MILITARY space activities & Space Industry
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China launches new Earth observation satellite | Xinhua 20201207
Gaofen-14, part of CHEOS -- China High-Definition Earth Observation Satellite
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Upgraded Long March 3B Launches Gaofen 14 Satellite
December 6, 2020 | Doug Messier | Parabolic Arc
BEIJING (CALT PR) — On Dec. 6 at 11:58 a.m., the Long March 3B successfully launched the Gaofen 14 remote sensing satellite into orbit from the Xichang Satellite Launch Center.
There are two major changes in the Long March 3B rocket that performed the mission: the fairing has been increased by 900 mm; and it will perform the low-orbit launch mission for the first time.
The Gaofen 14 satellite launched this time has a relatively taller size. In order to meet the needs of the mission, the fairing of the rocket was 900 mm higher than the previous 4.2-meter diameter fairing.
The height of the fairing has changed the shape of the rocket. The total length of the rocket is 58 meters.
The first low-orbit launch mission
In the past, Long March 3B rockets were used to perform high-orbit launch missions, including geosynchronous transfer orbit (GTO orbit) and medium earth orbit (MEO orbit). This launch is the first low-orbit launch mission of Long March 3B rocket, namely sun synchronization. Orbital mission (SSO orbit).
To this end, a lot of changes have been made to the software part of the rocket control system, and the flight software code has been rewritten by about 30%, including the addition of guidance control in the first-level flight segment, the use of “4 yuan” for attitude control throughout the entire process, and use of the third-level.
In addition to iterative guidance and control, the purpose is to adapt to changes in the launch orbit. This launch means that the Long March 3B rocket has both high and low orbit launch capabilities, which improves the orbital adaptability of the Long March 3B rocket.
This mission was the 354th launch of the Long March series rocket.
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From Cosmic Penguin @Cosmic_Penguin on 2020.12.06:
Gaofen-14, part of CHEOS -- China High-Definition Earth Observation Satellite
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Upgraded Long March 3B Launches Gaofen 14 Satellite
December 6, 2020 | Doug Messier | Parabolic Arc
BEIJING (CALT PR) — On Dec. 6 at 11:58 a.m., the Long March 3B successfully launched the Gaofen 14 remote sensing satellite into orbit from the Xichang Satellite Launch Center.
There are two major changes in the Long March 3B rocket that performed the mission: the fairing has been increased by 900 mm; and it will perform the low-orbit launch mission for the first time.
The Gaofen 14 satellite launched this time has a relatively taller size. In order to meet the needs of the mission, the fairing of the rocket was 900 mm higher than the previous 4.2-meter diameter fairing.
The height of the fairing has changed the shape of the rocket. The total length of the rocket is 58 meters.
The first low-orbit launch mission
In the past, Long March 3B rockets were used to perform high-orbit launch missions, including geosynchronous transfer orbit (GTO orbit) and medium earth orbit (MEO orbit). This launch is the first low-orbit launch mission of Long March 3B rocket, namely sun synchronization. Orbital mission (SSO orbit).
To this end, a lot of changes have been made to the software part of the rocket control system, and the flight software code has been rewritten by about 30%, including the addition of guidance control in the first-level flight segment, the use of “4 yuan” for attitude control throughout the entire process, and use of the third-level.
In addition to iterative guidance and control, the purpose is to adapt to changes in the launch orbit. This launch means that the Long March 3B rocket has both high and low orbit launch capabilities, which improves the orbital adaptability of the Long March 3B rocket.
This mission was the 354th launch of the Long March series rocket.
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From Cosmic Penguin @Cosmic_Penguin on 2020.12.06:
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samsara
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A cool footage explaining the tracking method used in the rendezvous and docking of the ascender and orbiter of Chang'e-5 spacecraft -- with Engsub.
Having completed its mission, Chang’e-5’s ascender was separated from the orbiter-returner spacecraft. According to Gao Lei (an official at CNSA), the orbiter-returner assembly will orbit the Moon for about six to seven days (there's a certain time window for leaving the transfer orbit in order to land in the designated spot in Inner Mongolia, that's why the spacecraft needs to accomplish the extra lunar orbits), then enter the Earth-Moon transfer orbit, and experiences another three to four days of flight before returning to Earth.
For the rendezvous and docking operations of ascender and orbiter, Chang’e-5 used a microwave radar. After docking, the lunar samples were transferred from the ascender to the sample return capsule.
Credit: China Central Television (CCTV) / China National Space Administration (CNSA)
Temstar/SDF explained adeptly why the Chang'e-5 remaining spacecraft needs to do extra lunar orbits before reaching out the Siziwang Banner in Inner Mongolia:
Due to the Moon doesn't orbit Earth on its equator, but rather at just over 5 degrees inclination. On top of this Chang'e-5 doesn't orbit the Moon on its equator either but at some angle. When you fire your engine to eject from lunar orbit you want to do it without any normal or anti-normal components, as those only change your inclination and does not contribute to your escape from the Moon to get back to Earth.
Chang'e-5‘s reentry trajectory, as posted by cacao86 /SDF
So you have to wait for Chang'e-5 orbital plane around the Moon to line up with the Moon's orbital plane around Earth, so that when you complete your escape burn from Moon firing only in prograde direction [of planetary motion, proceeding from west to east; direct] your Earth orbit periapsis is near Inner Mongolia [the nearest point of approach of an orbiting body, is the pericenter, also periapsis, of an orbit]. This would only come up at something like once or twice per lunar orbit.
Having completed its mission, Chang’e-5’s ascender was separated from the orbiter-returner spacecraft. According to Gao Lei (an official at CNSA), the orbiter-returner assembly will orbit the Moon for about six to seven days (there's a certain time window for leaving the transfer orbit in order to land in the designated spot in Inner Mongolia, that's why the spacecraft needs to accomplish the extra lunar orbits), then enter the Earth-Moon transfer orbit, and experiences another three to four days of flight before returning to Earth.
For the rendezvous and docking operations of ascender and orbiter, Chang’e-5 used a microwave radar. After docking, the lunar samples were transferred from the ascender to the sample return capsule.
Credit: China Central Television (CCTV) / China National Space Administration (CNSA)
Temstar/SDF explained adeptly why the Chang'e-5 remaining spacecraft needs to do extra lunar orbits before reaching out the Siziwang Banner in Inner Mongolia:
Due to the Moon doesn't orbit Earth on its equator, but rather at just over 5 degrees inclination. On top of this Chang'e-5 doesn't orbit the Moon on its equator either but at some angle. When you fire your engine to eject from lunar orbit you want to do it without any normal or anti-normal components, as those only change your inclination and does not contribute to your escape from the Moon to get back to Earth.
Chang'e-5‘s reentry trajectory, as posted by cacao86 /SDF
So you have to wait for Chang'e-5 orbital plane around the Moon to line up with the Moon's orbital plane around Earth, so that when you complete your escape burn from Moon firing only in prograde direction [of planetary motion, proceeding from west to east; direct] your Earth orbit periapsis is near Inner Mongolia [the nearest point of approach of an orbiting body, is the pericenter, also periapsis, of an orbit]. This would only come up at something like once or twice per lunar orbit.
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LKJ86
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Ascender of Chang'e-5 leaves lunar orbit, lands on moon
Source: Xinhua | 2020-12-08 17:49:12 | Editor: huaxia
BEIJING, Dec. 8 (Xinhua) -- The ascender of China's Chang'e-5 probe departed from the lunar orbit under ground commands at 6:59 a.m. and landed on the moon at 7:30 a.m. Tuesday (Beijing Time), sources with the China National Space Administration said.
The ascender previously took off from the lunar surface and completed rendezvous and docking with the probe's orbiter-returner combination in the lunar orbit.
After transferring samples collected on the moon to the returner, the ascender separated from the orbiter-returner combination on Dec. 6.
Tuesday's maneuver marks the completion of the ascender's mission, according to the space administration.
Deorbiting and moon landing of the spacecraft can prevent it from becoming space debris and affecting follow-up lunar missions of other countries, which is also an important commitment of China, as a responsible country, to the peaceful exploration and use of space by humankind, the administration said.
The Chang'e-5 probe, comprising an orbiter, a lander, an ascender and a returner, was launched on Nov. 24.
samsara
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From 中国航天旅游 @Longmarch13 on 2020.12.09:
稀有视角:中国文昌航天发射场测控大厅（嫦娥五号发射任务）
视频使用广角摄像头拍摄。正中间的人是01指挥员，名叫胡旭东，算是个名人。他指挥了长征五号火箭首飞任务，长征五号遥二任务，长征五号B运载火箭首飞任务，以及嫦娥五号任务。
左一为黄兵，左二是大名鼎鼎的大长征五号火箭总设计师李东。
Rare perspective: Measurement and Control Hall of the Wenchang Space Launch site (Chang'e-5 launch mission).
The video was shot using a wide-angle camera. The man in the middle is Commander 01, whose name is Hu Xudong. He is a celebrity. He directed the first flight of the Long March 5 rocket, the second Long March 5 rocket, the first flight of the Long March 5B carrier rocket, and the Chang 'e-5 mission.
The first on the left is Huang Bing, and the second on the left is Li Dong, the famous chief designer of the Long March 5 rocket.
I am not sure about other figures mentioned, which one is meant as the 1st left and 2nd left of above pics. But the middle one, Commander 01, Hu Xudong, I think it's obvious thus i put the name label.
稀有视角:中国文昌航天发射场测控大厅（嫦娥五号发射任务）
视频使用广角摄像头拍摄。正中间的人是01指挥员，名叫胡旭东，算是个名人。他指挥了长征五号火箭首飞任务，长征五号遥二任务，长征五号B运载火箭首飞任务，以及嫦娥五号任务。
左一为黄兵，左二是大名鼎鼎的大长征五号火箭总设计师李东。
Rare perspective: Measurement and Control Hall of the Wenchang Space Launch site (Chang'e-5 launch mission).
The video was shot using a wide-angle camera. The man in the middle is Commander 01, whose name is Hu Xudong. He is a celebrity. He directed the first flight of the Long March 5 rocket, the second Long March 5 rocket, the first flight of the Long March 5B carrier rocket, and the Chang 'e-5 mission.
The first on the left is Huang Bing, and the second on the left is Li Dong, the famous chief designer of the Long March 5 rocket.
I am not sure about other figures mentioned, which one is meant as the 1st left and 2nd left of above pics. But the middle one, Commander 01, Hu Xudong, I think it's obvious thus i put the name label.
samsara
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From Henri Kenhmann at East Pendulum on 2020.12.10:
Two scientific satellites GECAM (Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor) will be put into orbit 600 km x 29 °, by a CZ-11 launcher from the Xichang space center, on December 10 at around 04:00 Beijing time.
Two scientific satellites GECAM (Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor) will be put into orbit 600 km x 29 °, by a CZ-11 launcher from the Xichang space center, on December 10 at around 04:00 Beijing time.
@Deino
Did u delete my reply to this post? If my reply is delete. Why such inflammatory post is allow to be here? I don't think this post is anything related to China space industry and I hope a fair moderating can be carry out to all party. Thank you.
China Space Industry
Congrats you guys on Change e 5s success , Isn't Linkspace doing VTVL landing reusable rockets ? And when is the Long March 9 rolling out is it 2030 ? Thank you. Yes, there are more than one private companies in China doing reusable rockets. 2030 as planned if I remember right.
defence.pk
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Deino
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@Deino
Did u delete my reply to this post? If my reply is delete. Why such inflammatory post is allow to be here? I don't think this post is anything related to China space industry and I hope a fair moderating can be carry out to all party. Thank you.
China Space Industry
Congrats you guys on Change e 5s success , Isn't Linkspace doing VTVL landing reusable rockets ? And when is the Long March 9 rolling out is it 2030 ? Thank you. Yes, there are more than one private companies in China doing reusable rockets. 2030 as planned if I remember right.defence.pk
Agreed, but this one has not been reported and I must have missed it. Sorry for that.
LKJ86
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Chang'e-5 orbiter-returner completes orbital maneuver to prepare for return
Source: Xinhua | 2020-12-12 12:50:04 | Editor: huaxia
BEIJING, Dec. 12 (Xinhua) -- The orbiter-returner combination of China's Chang'e-5 probe on Saturday completed an orbital maneuver, preparing to leave the lunar orbit for a trajectory that returns it to Earth, according to the China National Space Administration.
After about six days in lunar orbit, the orbiter-returner combination completed the maneuver at 9:54 a.m. (Beijing Time), changing from a nearly circular orbit to an elliptical orbit with a perilune altitude of 200 km.
The orbiter-returner combination is scheduled to have another orbital maneuver to escape lunar gravity and enter the moon-Earth transfer orbit to return to Earth.
Chang'e-5 is one of the most complicated and challenging missions in China's aerospace history. It is also the world's first moon-sample mission in more than 40 years.
The probe, comprising an orbiter, a lander, an ascender and a returner, was launched on Nov. 24, and its lander-ascender combination touched down on the north of the Mons Rumker in Oceanus Procellarum, also known as the Ocean of Storms, on the near side of the moon on Dec. 1.
The probe's returner is expected to land at the Siziwang Banner in north China's Inner Mongolia Autonomous Region in mid-December.
Source: Xinhua | 2020-12-12 12:50:04 | Editor: huaxia
BEIJING, Dec. 12 (Xinhua) -- The orbiter-returner combination of China's Chang'e-5 probe on Saturday completed an orbital maneuver, preparing to leave the lunar orbit for a trajectory that returns it to Earth, according to the China National Space Administration.
After about six days in lunar orbit, the orbiter-returner combination completed the maneuver at 9:54 a.m. (Beijing Time), changing from a nearly circular orbit to an elliptical orbit with a perilune altitude of 200 km.
The orbiter-returner combination is scheduled to have another orbital maneuver to escape lunar gravity and enter the moon-Earth transfer orbit to return to Earth.
Chang'e-5 is one of the most complicated and challenging missions in China's aerospace history. It is also the world's first moon-sample mission in more than 40 years.
The probe, comprising an orbiter, a lander, an ascender and a returner, was launched on Nov. 24, and its lander-ascender combination touched down on the north of the Mons Rumker in Oceanus Procellarum, also known as the Ocean of Storms, on the near side of the moon on Dec. 1.
The probe's returner is expected to land at the Siziwang Banner in north China's Inner Mongolia Autonomous Region in mid-December.
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LKJ86
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Chang'e-5 orbiter-returner enters moon-Earth transfer orbit
Source: Xinhua | 2020-12-13 13:09:47 | Editor: huaxia
BEIJING, Dec. 13 (Xinhua) -- The orbiter-returner combination of China's Chang'e-5 lunar probe conducted its second orbital maneuver at 9:51 a.m. on Sunday and entered the moon-Earth transfer orbit, sources with the China National Space Administration said.
Four 150N engines on the orbiter-returner combination ignited when they were 230 km away from the lunar surface and shut down after 22 minutes, the administration said in a statement.
According to real-time monitoring data, the orbiter-returner combination entered the targeted orbit successfully.
Later, the spacecraft combination carrying lunar samples will conduct orbital correction during its journey to Earth. When the time is right, the orbiter and returner will separate from one another, according to the administration.
The Chang'e-5, comprising an orbiter, a lander, an ascender and a returner, was launched on Nov. 24. Its orbiter-returner combination completed its first orbital maneuver on Saturday.
Source: Xinhua | 2020-12-13 13:09:47 | Editor: huaxia
BEIJING, Dec. 13 (Xinhua) -- The orbiter-returner combination of China's Chang'e-5 lunar probe conducted its second orbital maneuver at 9:51 a.m. on Sunday and entered the moon-Earth transfer orbit, sources with the China National Space Administration said.
Four 150N engines on the orbiter-returner combination ignited when they were 230 km away from the lunar surface and shut down after 22 minutes, the administration said in a statement.
According to real-time monitoring data, the orbiter-returner combination entered the targeted orbit successfully.
Later, the spacecraft combination carrying lunar samples will conduct orbital correction during its journey to Earth. When the time is right, the orbiter and returner will separate from one another, according to the administration.
The Chang'e-5, comprising an orbiter, a lander, an ascender and a returner, was launched on Nov. 24. Its orbiter-returner combination completed its first orbital maneuver on Saturday.
samsara
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From Henri Kenhmann at East Pendulum on 2020.12.13:
On 13 December at 09:51 Beijing time, the Orbiter-Capsule of the Chang'e-5 probe inserted itself into the Moon-Earth transfer orbit, after activating four 150N motors for 22 minutes.
The probe, carrying the 2 kg of lunar soil sample, begins the 10th stage of its journey out of 11.
On 13 December at 09:51 Beijing time, the Orbiter-Capsule of the Chang'e-5 probe inserted itself into the Moon-Earth transfer orbit, after activating four 150N motors for 22 minutes.
The probe, carrying the 2 kg of lunar soil sample, begins the 10th stage of its journey out of 11.
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