Designing of a Novel Optical Two-Layered Satellite Network

Necessary condition of single continuous coverage is deduced with technique of Coverage Street, to satisfy the rigorous ATP (acquisition tracking pointing) demanding of optical satellite communication, a novel zero phasing factor, two-layered optical satellite network of LEO/MEO is designed according to the technique above. Lower layered satellite constellation of zero phasing factor has the stable logical topology of MESH, the ranges of azimuth and elevation are much less than that of non-zero phasing factor, which is very fit for optical inter-satellite links. In order to compensate bad coverage for equatorial region of LEO, MEO satellites which are positioned in two orbits are introduced. Spacing connections of two-layered satellite are computed and coverage performance is simulated. Results show the network brought forward can meet the ATP demand and provide 99.9% average coverage of global. This system should be considered as the reference of building up the optical satellite network of global coverage in China.