Constellation Acquisition and Maintenance of Sun Synchronous Frozen Orbit

YE Lijun, WANG Jingji, BAOYIN Hexi, YIN Haining, LIU Fucheng

Aerospace Contrd and Application . 2021, (3): 24 -32 . DOI: 10.3969/j.issn.1674-1579.2021.03.004