Satellite bidirectional time relative manner and the same device

摘要

PROBLEM TO BE SOLVED: To improve accuracy of time comparison by simultaneously comparing between facing ground stations for comparing time. SOLUTION: In this method, time comparison among a plurality of ground stations 6 is conducted, by using spectrum diffusion modulation method by way of a communication satellite 7. A plurality of reception synchronizing system of each ground station are used and the measured results of all ground stations 6 are combined, and the comparison results are obtained simultaneously. Using this method, the time difference between ground stations 6 comparing time is measured.