Algorithm of position calibrator for satellite interference location
QU Wen-zhong, YE Shang-fu · Chinese Journal of Radio Science · 2005
With differential time offset(DTO) and differential frequency offset(DFO), the position of the satellite interference can be located by using two-satellite. However, its very difficult to obtain accurate satellite ephemeris, which limits the accuracy of locating the satellite interference. In this paper, a novel algorithm is developed to eliminate the effects of the uncorrected ephemeris by using position calibrators. Theoretical derivation is given in detail and its proved that the errors introduced by uncorrected ephemeris can be completely removed through the use of four or more position calibrators. Compared with existing alternatives without position calibrators, simulation results confirm that the proposed algorithm can reduce the position error by an order of magnitude or more.