China successfully launched the Geodetic Exploration-1 B satellite 0 1. What needs can this satellite meet in China?

China successfully launched the Geodetic Exploration-1 B satellite 0 1. What needs can this satellite meet in China? Let's discuss this problem below, hoping that these contents can help friends in need.

China successfully launched the L-SAR0 1 Group B launch rocket with the Long March IV C rocket engine at Jiuquan Satellite Launch Center. The satellite successfully entered the scheduled orbit and the daily launch mission was successfully completed. After the on-orbit networking scheme of satellite and A-star, the daily key work is to accurately measure the ground deformation interference with double stars, and the world's first L-band radar remote sensing double stars and twelve constellations are built to accurately measure the ground deformation interference. You can also use two satellites to fly around, build the world's first L-band distributed system formation multi-polarization interferometric SAR satellite system software, and complete high-precision topographic mapping. Its digital satellite will provide a powerful space technology support point for natural disasters, land and resources survey, earthquake evaluation, disaster prevention and mitigation propaganda, basic surveying and mapping projects, forestry and fruit industry survey, etc.

The basic principle of interferometric SAR measurement stipulates that two satellites must observe the earth within a specified angle difference. However, the two satellites continue to fly around for fitness, the distance and angle difference between the two satellites are constantly changing, and there will be enough anti-collision distance between the satellites, which obviously poses an unprecedented challenge to the design scheme and operation of satellite formation structure.

"According to the regulations of double-star interferometry, double stars need to sail side by side in space all the time, just like two figure skaters in the Winter Olympics, it is necessary to ensure the accurate and smooth technical operation and the harmonious cooperation of double movements. Different from the performance of a few minutes, the satellite must get rid of the hazards of various complex factors and complete smooth operation during the daily mission cycle. " Wei Chun, interior designer of Deputy General Manager of Satellite, explained.

The R&D elite team fully considered the relatively limited natural material distribution and long-term operation law, clearly put forward the design scheme of the flying formation configuration and the new way of accurate maintenance, and improved the main parameters of the double-star orbit by using the perturbation correlation of the earth's gravity. At the same time, the autonomous maintenance technology is designed according to the precise monopulse control formation configuration, and the main parameters of the fly-around configuration are accurately controlled at the meter level, reaching the world leading level.

The R&D elite team innovatively pointed out that according to the high-precision data satellite binary semi-physical formation simulation system software, the long-period fast formation simulation test standard and the high-precision external clock timing technology, the problem that the time standard of multiple real-time simulation computer operating systems is complex and difficult to unify was solved, and the accuracy of each simulation clock in the system was controlled at ms level, thus ensuring the consistency and reliability of time difference. Based on the network data information, the orbit control countermeasures can be quickly transformed, and the simulation links of the whole process of long-period orbit control can be divided. At the same time, the testing cycle time, which must be tens of days, is reduced by half while ensuring the testing adhesion.