On June 5, China's Shenzhou 14 manned spacecraft was successfully launched from the Jiuquan Satellite Launch Center. In this mission, CETC provided core technical support for the safe launch of rockets, flight into orbit, rendezvous and docking, monitoring and search and rescue, etc. Build a strong defense line and ensure security control. In every manned mission of "Shenzhou" series spacecraft, the "sharp weapon" of the security control system developed by CETC will be used. "The task of the security control system is quite special. We must not only make a ten thousand year 'spare tire', but also have reliable performance every time." Experts from CETC said that the main task of the security control system is to conduct real-time dynamic monitoring of the data during the launch of the rocket in the active phase of the launch mission, so as to analyze and judge the status of the rocket. Once the flight is abnormal, it can help the astronauts escape safely and provide a foolproof guarantee for the life safety of the astronauts. At the same time, send special instructions to start the self destruction device to avoid the harm caused by the rocket falling to the ground to the greatest extent. The flight goes into orbit, and the TT & C network "connects". Like driving on the highway, there are many risks hidden in the journey of Shenzhou 14 spacecraft. Adjust the "steering wheel" in time if you go wrong, and pay attention to the signs when you change the road. If you go wrong, you should turn around In this process, it is particularly important to control the receiving and transmitting signals. "After the spacecraft takes off, the TT & C communication system is the only link between the spacecraft and the ground. For astronauts, the system is also their 'lifeline' to the ground." According to the experts of CETC, the measurement and control communication stations built at many stations all over the land, sea, air and space as well as at home and abroad have four major functions: track measurement, telemetry, remote control and data transmission. During the flight of Shenzhou 14 spacecraft, the TT & C communication system can measure the distance, speed and angle of the spacecraft from the ground, and judge whether there is deviation from the ideal orbit. "In case of yaw, the TT & C communication system can control on the ground, give orbit change instructions, guide the astronauts to the correct orbit, and ensure a smooth journey." In addition, the TT & C communication system can also realize the measurement of various equipment operating parameters on the spacecraft, some physiological indicators of astronauts, and high-speed data transmission, supporting the completion of heaven earth dialogue, "Tiangong classroom" and other functions. Safe travel, super battery power. After entering space, the only energy source of the spacecraft in orbit is the solar array. "By converting the received solar energy into electric energy, the solar array can provide electric energy for all subsystems and payloads of the spacecraft, and provide charging services for the battery pack. It is the core single machine for the spacecraft in orbit." Experts from CETC said that during the Shenzhou 14 mission, CETC equipped the spacecraft with rigid solar array products with stable performance and full energy. The product adopts a three junction GaAs solar cell with high conversion efficiency and good radiation resistance. The cell has stable structure, high reliability and sufficient in orbit verification. Even in the face of the complex power supply environment in the ultra-low orbit, it can be "as stable as Mount Tai", enabling astronauts to have a safe journey and full of energy during their "space business trip". Rendezvous and docking, radar guidance. At 17:42 on June 5, the Shenzhou 14 manned spacecraft adopted the autonomous rapid rendezvous and docking mode. After six autonomous orbit changes, it successfully docked the radial ports of the Tianhe core module. The whole docking process lasted about 7 hours. In the process of rendezvous and docking, the lidar developed by CETC can receive optical signals from multiple directions and a wide range, and provide real-time relative position information between the spacecraft and the space station. In order to practice accurate "insight" in rendezvous and docking, CETC has broken through the problems of large dynamic, high-precision and multi parameter real-time measurement, and realized the functions of new scanning system, multi-target switching and multi-target recognition, so as to ensure the accurate completion of rendezvous and docking. In addition, in order to carry out ground control and comprehensive display during rendezvous and docking, CETC is equipped with a three-dimensional comprehensive stereoscopic display system to provide an effective basis for task execution. Flight safety, radio wave monitoring. Create an "iron wall" for radio wave technology and observation application, and CETC will escort the normal operation of aerospace measurement and control and target tracking system during this mission. Based on the worldwide radio wave environment observation station network, CETC continuously monitors the space radio wave environment 24 hours a day, providing support for the reliable operation of aerospace measurement and control, satellite communication and other systems. At the same time, a three-dimensional search and rescue network with close, medium and long-range coordination and coordination between sea, land and air was carefully deployed to conduct search and rescue monitoring in an all-round, all-weather and zero dead angle, providing a strong guarantee for the smooth departure of astronauts. (Xinhua News Agency)