Abstract: Geosynchronous Earth Orbit (GEO) is regarded as a strategic area in the space. Analysis is made based on the space situational satellites, GSSAP (geosynchronous space situational awareness program), which are deployed on GEO by the US space force. Strategies including drifting, maneuvering and conducting are extracted from GSSAP orbit elements history in recent years and analyzed based on GSSAP typical observation scenery. Simulations are conducted based on three provided maneuver strategies. Efficiency are compared under different conditions and the mobility requirement under different inclinations are analyzed. The analysis results can effectively support technical development in Chinese in orbit service and space debris detection.

Key words: GSSAP, drifty observation, proximity observation, maneuvering strategy