Spatio-Temporal Grid-Based Mission Planning for Earth Observation Satellite Mega-Constellation

With the development of remote sensing satellite application technology and the increasing spatial and temporal resolution requirements for Earth observation requirements, remote sensing satellite constellations constructed mainly with microsatellites have the advantages of low cost, mass production, emergency launching, and strong coordinated observation effectiveness. In order to further improve the Earth observation mission planning efficiency of remote sensing sa-ellite mega-constellations, a global spatio-temporal grid-based mission planning for Earth observation satellite mega-constellation is proposed. The presented core ideas and solutions are based on the global spatio-temporal grid subdivision and includes the spatio-temporal grid modeling, the determination of lower and upper limit of grid size, the gridding representation of Earth observation missions, the gridding fusion of Earth observation missions, the calculation of grid observation requirement benefits, the candidate strip generation and the information retrieval process, etc., which can provide a solution idea for the subsequent grid-based ap-plication of mega-constellation mission planning.