摘要

<正>On January 5, 2020, China’s heaviest and most advanced satellite, Shijian 20, reached its fixed position in its 36,000 kmgeosynchronous orbit after seven orbital maneuvers, marking the first successful flight of DFH-5 satellite platform.The Shijian 20 satellite, weighing more than 8 t, was developed by the China Academy of Space Technology.With a design