According to CCTV news reports, the Shensan 13 return capsule landed successfully, and the return capsule was in an upright state.
Welcome to Zhai Zhigang, Wang Yaping, Ye Guangfu and return to Earth. The three astronauts are in good health. CCTV news also showed some moments of Shenzhou 13 landing. Some netizens saw the return capsule opening the umbrella like a lollipop.
According to the official statement, the return of the Shenzhou 13 spacecraft to the ground can be said to be a complicated and thrilling process. It has to go through key flight events and links such as orbit separation, push-back separation, re-entry, passing through the black barrier, and opening the parachute. Harsh space environment and orbital conditions test. Under the careful design of the technicians of the Fifth Academy of China Aerospace Science and Technology Corporation, the Shenzhou 13 spacecraft firmly grasps the “three degrees”, namely: speed, temperature and accuracy, to ensure that it will land steadily and “go home” safely.
The return of the Shenzhou spacecraft is like ten rings in ten thousand miles. The requirements for the landing accuracy are extremely high. In order to make the return capsule land in the designated area, the accuracy of the landing point of the spacecraft must be controlled. To this end, technicians equipped the Shenzhou 13 spacecraft with a set of “landing light work”.
The first is to maintain the return orbit, adjust the orbital plane of the spacecraft so that the trajectory of the spacecraft’s sub-satellite point passes through the return aiming point; then return to the brake, through the speed increment of the brake and the engine start time, to ensure the re-entry angle and return range, in order to be accurate The landing provides guarantee; the last is the lift control of the return capsule. After entering the atmosphere, the return capsule uses a series of attitude maneuvers, cleverly uses the lift generated by aerodynamics to control the heading and lateral movement, accurately adjusts the predetermined landing point, and finally returns safely.
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