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干涉测量具有被动式测量特点,对空间非合作目标轨道监测具有天然优势。利用5.5公里基线干涉测量系统,针对GEO卫星开展了差分干涉测量实验。引入群时延辅助的相时延处理技术,GEO卫星干涉测量噪声约9.4ps。基于“2小时标校-13小时跟踪-2小时标校”的长时差分观测模式,GEO卫星干涉测量误差约0.267ns,定轨解算星历与精密星历最大径向偏差为35.7公里。结果表明,单基线干涉测量可以收敛解算GEO卫星轨道,实现较高精度的GEO卫星轨道被动式监测。
Interferometric measurement has the characteristics of passive measurement, and has the natural advantage of non-cooperative target orbit monitoring in space. Using a 5.5 km baseline interferometry system, differential interferometry experiments were conducted for the GEO satellite. The introduction of group delay-assisted phase delay processing technology, GEO satellite interference measurement noise of about 9.4ps. Based on the long-term differential observation model of “2 hours calibration - 13 hours tracking - 2 hours calibration calibration”, the measurement error of GEO satellite interferometry is about 0.267ns. The maximum radial deviation between the orbit resolution and precision ephemeris is 35.7 Km. The results show that the single baseline interferometry can converge and solve the GEO satellite orbit and realize the high precision GEO satellite orbit passive monitoring.