Beijing, 27 Feb (China News Service) -- At 7:44 a.m. on 27 February, China successfully launched a land-based exploration of the No. 1 01 B satellite (also known as the B star of the L-band differential interference synthetic aperture radar satellite) at the Jiuquan Satellite Launch Center using the Long March 4 Cyao 30 carrier rocket.
At 7:44 Beijing time on February 27, China successfully launched the L-SAR 01 B satellite at the Jiuquan Satellite Launch Center with the Long March 4 C carrier rocket. Photo by Wang Jiangbo
The Land Exploration No. 1 Group 01 satellite is the first scientific research satellite project approved in the "National Civil Space Infrastructure Medium- and Long-term Development Plan (2015-2025)", consisting of A and B satellites. A satellite has been successfully launched at the Jiuquan Satellite Launch Center on January 26, and is currently conducting on-orbit tests as planned, and the relevant functions of the satellite are performing normally. After the B star enters orbit, it will be tested separately on orbit, followed by a formation test with the A star.
Land Exploration No. 1 Group 01 A and B double star technology state is basically the same, are equipped with L-band synthetic aperture radar (SAR) load, in orbit application of interferometry and differential deformation measurement technology, can achieve heavy orbit interferometric deformation measurement, double star formation interferometry and single star imaging and other functions, complete the surface deformation measurement, digital elevation model acquisition and other major observation tasks, with all-weather, all-weather, multi-mode, multi-polarization and other characteristics, support and service land resources, earthquakes, disaster prevention and mitigation, basic geographic information acquisition, Forestry and other application needs can form a rapid response capability for major disasters.
Like the A star, the total area of the B star SAR antenna of the Land Exploration No. 1 Group 01 is more than 33 square meters, which is currently one of the largest SAR satellites in orbit in China. The launch of the Land Exploration No. 1 Group 01 successfully realized the development of China's L-band interferotic SAR satellite "from scratch", which will realize the independent control of China's differential interference SAR data.
At 7:44 Beijing time on January 26, 2022, China successfully launched the L-SAR 01 group A satellite at the Jiuquan Satellite Launch Center with the Long March 4 C carrier rocket. The satellite successfully entered the predetermined orbit and the launch mission was a complete success. The satellite is mainly used for effective monitoring of the geological environment, landslides, earthquake disasters, etc. Photo by Wang Jiangbo
Compared with similar international satellites, the Land Exploration No. 1 01 satellite has significantly improved in the design of the formation system, the sensitivity of the SAR system, and the strict regression orbit control, which is expected to achieve the leap from "useless" to "well-used" domestic differential interference SAR data, alleviate the dependence of industry applications on foreign SAR data, and provide strong support for the "Belt and Road" initiative and the realization of sustainable development goals.
In addition, the land exploration of the First Group 01 A and B two satellites use long-life, high reliability, average photoelectric conversion efficiency greater than 30% of the three-junction gallium arsenide solar cells, and for the first time using a domestic germanium substrate. At present, the A-star in-orbit data shows that the solar cell not only has no less electrical performance than imported solar cells, but also has better mechanical performance, which can meet the mission requirements of long life in orbit.
This launch is the 87th launch of the Long March 4 series of carrier rockets and the 408th launch of the Long March series of carrier rockets. The Star Arrow was developed by the Eighth Academy of China Aerospace Science and Technology Corporation. (End)