Abstract
Abstract: The relative angular position error covariance model of two deep space probes is propagated based on the error covariance analysis method, and is used for the relative angular position error analysis for multiple deep space probes. The differential time delay model of Same Beam Interferometry (SBI) about the relative right ascension and relative declination of two deep space probes is established, and the information matrixes of two ground-based baseline differential time delay measurements are obtained. The relative angular position error covariance is established, and the influence of measurement error and measurement geometry on relative angular position error is analyzed. The results show that in appropriate measurement geometry the relative right ascension and relative declination error of Mars probe are in order of 0.1nrad when the measurement error is in order of pico-second.
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