Chinanews.com, Beijing, September 18 (Marshua Shao, Hao Jing, Zhou Yonggang, Wang Ran) To ensure the smooth return of the Shenzhou XII spacecraft, which has been in orbit for 3 months, on the 17th, the Beijing Space Information Transmission Center technicians were in the mission hall on the same day. In, checking the status of various technologies.
In the past three months, the center has provided monitoring and control services for the space station complex 24 hours a day.
"The 03 star'Tianlu No. 1'captured the Shenzhou 12 manned spacecraft!" At 12:40 on the 17th, a password from the central dispatcher Ma Chao came from the lobby. The information transmission link diagram on the screen showed that the 03 star was already A real-time data transmission link was established with the Shenzhou 12 manned spacecraft.
"'Acquisition target' and'tracking normally' are the passwords we hear most frequently during this period." Zheng Yonghui, an engineer sitting in a technical post, said that as the main measurement and control method of the space station assembly, the relay satellite system is responsible for them. Most of the measurement and control tasks of the running arc.
In the past three months, the relay satellite system has provided thousands of times of measurement and control services to the space station assembly, reaching the longest time the center has provided measurement and control services in history.
"Although the three astronauts don't know us, we are very familiar with them. In a fashionable phrase, we are their'close strangers'." Ma Chao said with a smile.
However, this "close stranger" is not good.
For the past three months, their most important task every day is to ensure that this "information road" is not interrupted and to keep on duty 24 hours a day.
The personnel of each shift must carefully plan and check the status to ensure that the space station's combined body can maintain real-time two-way contact with the ground.
In their minds, giving up short breaks during holidays is a trivial matter, and ensuring the safety of astronauts is a major matter.
With the "orbit-return separation" command issued, the spacecraft's return module and the orbital module "say goodbye."
On the lobby screen, the image in the return capsule sent back by the 03 satellite showed that the three astronauts were waiting in full battle and were ready to throw themselves into the arms of Mother Earth.
"'Orbit-back separation' and'push-back separation' are both critical stages of the spacecraft's return. The satellite link status must be checked strictly, rigorously, and carefully," said Li Le, a ground station staff member.
To this end, before the mission, they not only carefully checked and confirmed the technical status change points and configuration changes, but also carried out the implementation of the problem to zero, the special maintenance of the ground terminal station, and the seasonal maintenance of the computer communication system. Re-check the status by analogy.
On the night before the mission was implemented, the engineers Dong Kaifeng and Feng Weidong of the central orbital post were still staying up late to work overtime, carefully confirming whether the tracking arc of the relay satellite was correct.
At the same time, the center specifically issued targeted training and assessment notices, and organized various sub-systems to solidly improve the ability of personnel to perform tasks through key explanations, joint adjustments with posts, and old and new.
"Shenzhou 12, return and start braking!" The propulsion compartment of the spacecraft sprayed out dazzling flames, and the speed slowly dropped.
After a while, the command "push back and separate" came from the dispatch in the lobby, and the return capsule carrying three astronauts came straight to the earth along the scheduled return orbit.
The screen on the left side of the lobby showed that the helicopters of the air search and rescue team began to advance in accordance with the latest scheduled landing point.
Thanks to the advantages of dual antennas, the Tianlian-2 01 satellite, which is far in space at this time, not only continues to provide space-based measurement and control services for the Tianhe core module and the Tianzhou-2 cargo spacecraft complex, but also establishes a communications helicopter and Beijing The information transmission link of the aerospace flight control center provides real-time image, voice and other important data transmission support for search and rescue missions.
At 13:34, the return module of the Shenzhou 12 manned spacecraft successfully landed at the Dongfeng landing site, and there was warm applause in the hall.
Behind the applause is the 24-hour uninterrupted guardianship of Shenzhou 12 by all scientific and technical personnel of the center for nearly a hundred days.
"From the launch and operation of Shenzhou 12 to its return, search and rescue, the relay satellite system participated in and guaranteed the entire journey. During this period, the relay satellite system not only further verified the reliability and stability of the For all scientific and technical personnel, it is also an experience." The chief engineer of the center, Shan Changsheng, said that immediately, the center’s scientific and technical personnel will be involved in various preparations for subsequent manned space missions.
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