Satellite inter-satellite link antenna phase center variation calibration method and system

Abstract

The application provides a satellite Ka-band inter-satellite link antenna phase center variation calibration method and system, comprising: collecting L-band observation data and Ka-band inter-satellite link observation data of a ground station, performing gross error elimination, cycle slip detection, epoch normalization and combination, and generating clock error-free and geometry-free observation data; analyzing the range of the zenith angle and the azimuth angle of the observation data, constructing a segmented linear original PCV function model with the zenith angle and the azimuth angle as independent variables, and simultaneously solving the original PCV parameters of the satellite L / Ka band in the joint orbit determination process; using the least square separation technology, the original PCV is decomposed into a smooth PCV and a corresponding Z-direction PCO, the PCV values are interpolated based on a discrete grid, and a final PCV grid correction model is established; the PCV correction model is introduced into the joint orbit determination error correction, a new round of joint orbit determination is performed, and the satellite L / Ka band PCO correction amount is solved, so that the high-precision on-orbit calibration of the satellite Ka-band inter-satellite link antenna phase center variation is realized.

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