저궤도 위성의 톤 방식 위성 거리 측정 모호성 해석

Abstract

The satellite range measurement using tone method is accomplished by phase angles of tone signals, which are a major signal for measurement accuracy and minor signals for ambiguity resolution. In tone method, the satellite range ambiguity is occurred by phase error of returned replica tone signals from satellite. To compensate the phase error, it is difficult to adopt the usual error correction techniques for tone signal. So the tone signals that minimize the range measurement ambiguity are operated by considering the satellite orbit and link environment. In this paper, the ambiguity analysis of satellite range measurement using tone method was performed for LEO satellite with moving motion. In view of random phase error and static phase error due to satellite tracking error, the occurrence probability function of range measurement ambiguity was proposed. Also, the range ambiguity was quantitatively analyzed for effects of frequency ratios and signal-to-noise ratios of tone signals. The occurrence probability of satellite range measurement ambiguity is utilized in the range measurement analysis and satellite control operation of the LEO and GEO satellite