The related coverage performance

Doppler shift and service-supporting capability of the IGSO constellation was studied for the given area.The results show that

the constellation

which consists of two or three IGSO satellites

can achieve good coverage characteristics（the percent of time of one and more satellites coverage and average elevation an-gle）to the Chinese and nearby area with small Doppler shift.The link budget shows that

adopting IGSO can effectively solve the low elevation angle problem faced by GEO satellite

and similar performance

which can only be implemented by a very big GEO satellite

can be achieved by two or three relatively small IGSO satellites.So the solution of adopting IGSO to provide mobile satellite communication system is technically feasible.