On 1st December 2020 Tuesday, the flight control team of the CNSA China National Space Administration- CLEP- China Lunar Exploration Program Belt and Road Initiative – Beijing Aerospace Flight Control Center Chang’e 5 mission implemented the at 23:11 Hong Kong- Beijing time on December 1st 2020, the Chang’e-5 probe successfully landed on the front of the moon in a preselected area near 51.8 degrees west longitude and 43.1 degrees north latitude, and returned the landing image.
At 22:57 on December 1st, the Chang’e-5 probe’s onboard assembly began a power drop from about 15 kilometers away from the lunar surface. The 7,500 Nm variable thrust engine was turned on, and the probe’s longitudinal velocity relative to the moon was gradually increased from 1.7 km/ The second dropped to zero, during which the probe adjusted its attitude and landed smoothly in the area north of the Rumker Mountains in the stormy ocean on the front of the moon. During the landing, the landing camera equipped with the lander took an image of the landing area.
After a successful landing, the lander underground control has carried out state inspections and settings such as the deployment of the solar wing and the directional antenna, and will officially start working on the lunar surface for about 2 days, collecting about 2 kilograms of lunar samples. .
There are two ways to “dig out special products”
Why choose to land in the northeast of the storm ocean?
In general, the choice of the landing area of Chang’e 5 should take into account engineering feasibility and scientific value. First of all, the north-eastern part of the storm ocean is flat, with good communication conditions, and ideal light and temperature. In addition, the north-eastern part of the storm ocean has relatively high latitude. Human probes have not visited on-site before, so choosing to land here for sampling is representative.
What preparations have been made for sampling? How will sampling be carried out?
Before the mission was implemented, the scientific research team simulated hundreds of lunar soil on the ground and conducted thousands of experiments. After the moon falls, sampling will be implemented in two steps, namely drilling and table extraction. Surface samples are obtained from the surface layer of the moon through a robotic arm; samples of the moon about 2 meters deep under the surface of the moon are drilled and collected, and the original layered structure of the samples is maintained.
At 4:53 on December 2, the lunar exploration project Chang’e-5 lander and ascender assembly completed the lunar drilling sampling and packaging. After the probe successfully landed on the lunar surface at 23:00 on December 1, it carried out relevant preparations such as the deployment of the solar wing and the unlocking of the mechanism. Currently, the lander and ascender combination is undergoing table sampling as planned. The automatic sampling task of the Chang’e-5 detector adopts the combination of surface drilling and multi-point sampling, and two “digging” modes of drilling tool drilling and robotic arm surface sampling are designed.
On November 30TH 2020 Monday, the flight control team of the China National Space Administration- CLEP- China Lunar Exploration Program- Beijing Aerospace Flight Control Center Chang’e 5 mission implemented the lander and ascender combination – ( hereinafter referred to as the upper combination) and the orbiter and returner combination (hereinafter referred to as the orbital return combination) as planned ) Separation.
At 4:40 in the Hong Kong – Beijing morning time, under the precise control of scientific and technical personnel, the Chang’e-5 detector assembly separated smoothly. The orbit-back assembly will continue to fly in an orbit around the moon with an average altitude of about 200 kilometers, waiting for the ascender to rendezvous and dock. The upper assembly will choose an opportunity to soft land in the pre-selected area and carry out subsequent tasks such as automatic sampling.
[Successful separation of the Chang’e-5 probe assembly] The separation is for better gathering. However, when we meet again, the lander will stay on the surface of the moon, looking at home on the earth. Perhaps, with the development of science and technology, one day in the future, someone will go to the moon to see it, and even bring it back to its home on the earth….. The orbiter and returner assembly will continue to fly in an orbit around the moon with an average altitude of about 200 kilometers and wait for the ascender to rendezvous and dock. The lander and ascender assembly will choose the opportunity to perform a soft landing on the lunar surface, and perform subsequent work such as automatic sampling
The 8.2-metric ton Chang’e 5, China’s largest and most sophisticated lunar probe, was launched by a Long March 5 heavy-lift carrier rocket early on Tuesday morning at the Wenchang Space Launch Center in Hainan province, undertaking the world’s first mission since 1976 to return lunar samples to Earth.
Before the latest manoeuvre, Chang’e 5 carried out two orbital corrections and two braking operations.
After touchdown on the lunar surface, the lander-ascender combination will begin to engage in tasks such as using a technically advanced drill to retrieve rocks from 2 meters beneath the surface, and gathering soil from the surface with a mechanical arm.
If everything proceeds smoothly, around 2 kilograms of stones and soil will be collected and packed in a vacuum-sealed metal container inside the ascender.
After two days, when the surface operations are completed, a 3,000-newton-thrust engine on the ascender will lift it to rendezvous and dock with the re-entry module. It will transfer the lunar samples to the module and then separate from it.
The combination of orbiter and re-entry capsule will then return to the Earth’s orbit, where the pair will break up and the re-entry capsule will conduct a series of complicated Maneuvers to return to a preset landing site in the Inner Mongolia autonomous region in mid-December.
If the entire mission is successful, it will be China’s first time to successfully retrieve an extraterrestrial substance. Furthermore, it will make China the third nation, after the United States and the Soviet Union, to bring samples back from the moon……
On 20:23 on November 29th Sunday 2020, Hong Kong- Beijing time The Chang’e-5 probe brakes again and enters a nearly circular orbit around the moon….. According to the China National Space Administration- CLEP- China Lunar Exploration Program at 20:23 on November 29, Beijing time, the Chang’e-5 probe “brakes” again at the near-moon point. From an elliptical orbit around the moon to a nearly circular orbit around the moon. Later, the Chang’e-5 probe will choose an opportunity to separate the lander and ascender combination from the orbiter and returner combination. The lander and ascender combination will carry out a frontal soft landing on the moon, and automatic sampling of the lunar surface will be carried out as planned the picture shows the first near-moon braking picture…… Later, the Chang’e-5 probe will choose an opportunity to separate the lander and ascender combination from the orbiter and returner combination. The lander and ascender combination will carry out a soft landing on the moon’s front, and carry out tasks such as automatic lunar surface sampling as planned
Previously.. On at 20:58 on November 28th 2020 Saturday, Hong Kong- Beijing time The Chang’e-5 probe successfully implemented the “brake” braking and successfully entered the orbit around the moon….. According to the China National Space Administration- CLEP- China Lunar Exploration Program , at 20:58 on November 28, Beijing time, the Chang’e-5 probe flew to the moon after about 112 hours. The 3,000-N engine ignition was successfully implemented at a distance of about 400 kilometers from the lunar surface. About 17 minutes later, the engine shut down normally. According to the monitoring and judgment of real-time telemetry data, the Chang’e-5 probe braked normally in recent months and entered the orbit around the moon smoothly. Near-moon braking is one of the key orbital controls during the flight of the lunar probe. When the high-speed probe approaches the moon, it will apply “brake” braking, in order to make its relative speed lower than the moon’s escape speed, so that it will be captured by the moon’s gravity. The Chang’e-5 probe underwent two orbit corrections during the Earth-Moon transfer process and achieved the expected goal. In the future, the Chang’e-5 probe will adjust the height and inclination of the orbit around the moon, the lander and ascender assembly will be separated from the orbiter and returner assembly, implement the lunar frontal soft landing, and carry out the lunar surface automatic sampling as planned. .
During the every so constant delicate tracking at Xi’an Satellite Measurement and Control Center successfully completed the first near-month brake measurement and control work of Chang’e-5] “The near-month brake orbit control is turned on!” “Linhai’s tracking is normal! The remote data is normal!” At 20:00 on November 28 At 58 minutes and 38 seconds, the Jiamusi Deep Space Station of the Xi’an Satellite Measurement and Control Center successfully placed a remote control command from the Beijing Aerospace Flight Control Center. The engine of the Chang’e-5 probe was successfully ignited and the engine shut down normally after 17 minutes. According to real-time telemetry data monitoring and judgment, the Chang’e-5 probe successfully entered an elliptical orbit around the moon, and the first near-moon braking was a complete success……
Previously more……Onto 22 hours and six minutes into on November 24th 2020, the 3000N engine of the Chang’e-5 probe worked for more than 2 seconds, successfully completed the first orbit correction, and continued to fly to the moon. As of the first orbit correction, the systems of the Chang’e-5 probe were in good condition and had been in orbit for about 17 hours, about 160,000 kilometers away from the earth.
During the flight of the Chang’e-5 probe, affected by various factors, it will produce orbit deviation. It is necessary to determine the deviation between the actual flight orbit of the probe and the designed orbit, and complete the corresponding orbit control to ensure that the probe is always flying in the proper on track.
The Chang’e-5 mission launched into orbit with high accuracy, and the orbit correction is very small this time.
In which On early 24th November 2020 on a very mid early morning Tuesday of 0530 Hong Kong- Beijing Time in which succefully launched the CNSA –CLEP China National Space Administration- China Lunar Exploration – Belt and Road initiative Lunar Mission ….. Launching from Wenchang Spacecraft launch center – Hainan Province – China- People’s Republic of China… the previous day the Staff of Wenchang about 18:30 on November 23, 2020, the Long March 5 Yaowu carrier rocket began to refill liquid oxygen and liquid hydrogen cryogenic propellant, and it is planned to be implemented at 4 am to 5 am on the 24th. Launch mission. This is the second applied launch of the Long March 5 series of carrier rockets, which will transport the lunar exploration project Chang’e 5 probe to the Earth-Moon transfer orbit, and implement my country’s first extraterrestrial celestial body sampling and return mission. The launch window time of the Long March 5 Yaowu rocket is based on comprehensive consideration of the earth-moon position relationship and other factors, and the best launch time is selected after orbital design…..
During the early morning crowds from all over China travelled and gathered all around the view placements locations with the best views of the launching of the Change 5 with the Long March –Chang Zheng 5 Carrier Rocket..
the Belt and Road Initiative Lunar Change5 return sample planned landing zone is Mons Rumker in Oceanus Procellarum, located in the northwest region of the near side of the Moon…… The location is a large, elevated volcanic mound 70 km in diameter that features a strong spectroscopic signature of basaltic lunar mare material.
The mission is reported to consist of four modules or elements: the lander would collect about 2 kg of samples from 2 metres below the surface and place them in an attached ascent vehicle that will be launched into lunar orbit. The ascent vehicle will make an automatic rendezvous and docking with an orbiter that would transfer the samples into a sample-return capsule for their delivery to Earth…. Change5 lunar lander equipment payload composite off…. The lander will carry landing cameras, a panoramic camera, a spectrometer to determine mineral composition, a soil gas analytical instrument, a soil composition analytical instrument, a sampling sectional thermo-detector, and a ground-penetrating radar…….. For acquiring samples, it will be equipped with a robotic arm, a rotary-percussive drill, a scoop for sampling, and separation tubes to isolate individual samples……
After the Long March 5 Yaowu carrier rocket was launched into space, it carried out four separations, including booster separation, fairing separation, primary and secondary separation, and rocket separation. The Chang’e-5 probe consists of four parts: the orbiter, the returner, the lander, and the ascender. After the earth-moon transfer, near-moon braking, and circumlunar flight, the lander and ascender combination will be combined with the orbiter and return The orbiter assembly is separated, the orbiter carries the returner to stay in orbit, and the lander carries the ascender to choose an opportunity to implement a soft landing on the lunar front preselected area, and carry out follow-up work such as automatic lunar surface sampling as planned.
According to the China National Space Administration, the Chang’e-5 mission plans to achieve three major engineering goals: First, breakthrough key technologies such as narrow window multi-orbit binding launch, automatic lunar surface sampling and packaging, lunar take-off, lunar orbital rendezvous and docking, and lunar sample storage. Improve the level of China’s aerospace technology; the second is to realize China’s first automatic sampling and return of extraterrestrial celestial bodies to promote major progress in China’s science and technology; the third is to improve the lunar exploration engineering system and accumulate important talents for China’s future manned moon landings and deep-space exploration Technology and material basis.
The scientific goals of the Chang’e-5 mission are mainly to carry out the landform area detection and geological background survey, obtain the on-site analysis data related to the lunar samples, establish the connection between the on-site exploration data and the laboratory analysis data; carry out the system of the lunar samples , Long-term laboratory research to analyse the structure, physical properties, and material composition of the lunar soil, and deepen the research on the origin and evolution of the moon.
China’s lunar exploration project is a national key science and technology special landmark project clearly defined in the “National Medium and Long-term Science and Technology Development Plan (2006-2020)”. It is a major project to promote the development of aerospace industry, promote scientific and technological progress and innovation, and improve comprehensive national strength. Strategic decision. Since the project was established and officially launched in January 2004, five missions including Chang’e 1, Chang’e 2, Chang’e 3, re-entry flight test and Chang’e 4 have been successfully implemented. This launch mission is the 353rd flight of the Long March series of carrier rockets.
Images and visuals are from Weibo..