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Source title: Welcome “Chang’e” home, four children, Wang Qi, is ready
The combination of the “Chang’e-5” orbiter and the return orbiter successfully completed the first correction of the Moon to Earth transfer orbit at 11:13 on December 14. The system is in good condition and will soon embark on a journey back to Earth. A reporter for the Beijing Youth Daily learned from the “Chang’e 5” mission landing site headquarters that the “Chang’e 5” carrying 2 kilograms of precious lunar soil will land at the Siziwang Banner landing site. in Inner Mongolia in the near future. At present, all preparations for the landing field system are in place, and we welcome the “Little Five” to return home safely.
Since its successful launch from Wenchang on November 24, the Chang’e-5 probe has undergone flight, landing, automatic sampling and packing of the lunar surface, dynamic display of the national flag on the lunar surface, liftoff on the lunar surface , meet and dock, etc., with more than 20 hard jobs. Tian’s “Little Five” is finally going home. After successfully returning to earth with lunar soil samples, China will become the third country to return lunar samples after the United States and the former Soviet Union.
According to Bian Hancheng, a researcher at the Jiuquan Satellite Launch Center and deputy chief designer of the landing field system, the “Chang’e 5” regressor uses a semi-ballistic jump return, which is commonly known as the “drift” method. to return to earth. This return method is very difficult to control, resulting in a particularly large range of the recovery area. Compared to the manned spacecraft, the volume of the return vehicle “Chang’e-5” is only about one-seventh of the return cabin of the spacecraft, but the landing area is 16 times that of the manned spaceship. Today, the Siziwang Banner in the grasslands of central Inner Mongolia is frozen and snowy, with extreme cold and snow conditions. Searching for such a small target at night can be even more difficult. In response to these new challenges, the search and recovery team at the Jiuquan Satellite Launch Center has continually improved the plan, conducted multiple training exercises close to actual combat, and tested recovery, search and elimination capabilities and the team performance indicators.
Search and rescue personnel have taken many technical measures, such as processing radar measurement data to the helicopter and search vehicle, guiding the helicopter and search vehicle to approach the returning one, and installing high-powered searchlights on the helicopter and the search vehicle. Help search personnel quickly find the target. To ensure that the helicopter can land safely in the target area and that ground search and rescue vehicles can arrive smoothly, the search and early recovery team conducted nearly 30 topographic studies of the landing area in combination with the environment. night of snow and ice, mainly inspecting some dangerous features and landforms in the recovery area. A total of more than 100 communication towers, more than 30 wind measurement towers and more than 2,800 shepherd sites have been marked. Ravines, cliffs and some small lakes have been marked in the recovery area to provide a basis for commanders of all levels to make decisions.
At the same time, China’s first lunar sample laboratory is also ready. After the lunar soil samples collected by “Chang’e-5” are returned to earth, they will be stored in the ground application system of the lunar exploration project of the National Astronomical Observatory of the Chinese Academy of Sciences for processing and analysis.
Text / Reporter Lei Jia
