Project supported by the National Natural Science Foundation of China (No.40374006 , No.40304001) ;the Foundation for Ph.D project of ChineseMinistry of Education (No.20020486003) .
Satellite-to-Satellite Tracking in low-low model (SST-Ⅱ) is a new technique to resolve the series of problems met in the determination of the earth's gravity field. As the key technique of SST-Ⅱ, KBR can get SST-...