Antenna optical axis pointing calibration system and method based on precise distance measurement

Abstract

The invention provides an antenna visual axis pointing calibration system and method based on precise ranging, a ground test calibration system of a precise ranging subsystem antenna is established in a microwave anechoic chamber environment, various motion working conditions of the precise ranging subsystem antenna can be simulated, and meanwhile, the motion trails of the precise ranging subsystem antenna in the azimuth direction and the pitching direction are designed; micron-sized measurement data of a precise distance measurement subsystem is introduced, distance changes introduced by external environment vibration is monitored, turntable rotation and the like, and an equivalent simplified model of antenna visual axis pointing on-orbit calibration of the precise distance measurement subsystem is established; inter-satellite distance change data is simulated by introducing a precise distance measurement subsystem of an antenna phase directional diagram and synchronous error monitoring together, a movement track where an antenna visual axis points to calibration is designed, and a state equation and an observation equation of a calibration estimation algorithm are established; and finally high-precision calibration of the antenna visual axis pointing of the precise distance measurement subsystem and the phase directional diagram of the precise distance measurement subsystem are finished.

Description

technical field [0001] The invention relates to an antenna boresight point calibration system and method based on precision ranging, and belongs to the technical field of inter-satellite microwave measurement. Background technique [0002] Represented by the precision ranging subsystem of the low-low tracking gravity measurement satellite and the GNSS receiver, the antenna is the main component of the high-precision radio measurement system, responsible for the transmission and reception of signals, and the antenna phase center is the reference point for measurement. In order to realize the accurate conversion of distance information between phase centers and between centroids, it is very important to calibrate the boresight of the antenna under test. [0003] The existing systems and methods for calibration of antenna boresight pointing are basically divided into two categories: one is based on the microwave anechoic chamber and rotating device, also known as the rotating a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: aiming at the problems of easy distortion error and low calibration accuracy existing in the existing precision ranging subsystem antenna boresight pointing high-precision calibration in the current prior art, a precision-based Antenna boresight pointing calibration system and method for ranging

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