Telemetry ground station pointing calibration method

Abstract

The invention provides a telemetry ground station pointing calibration method. The method comprises the following steps that firstly, maximum tracking is carried out by utilizing solar radiation powerreceived by an antenna, then an antenna pointing angle is converted from a measurement coordinate system to an east-north-up coordinate system by utilizing the angle of the sun under the east-north-up coordinate system, a vector is scanned by utilizing the direction vector of the sun relative to a measurement and control station at the calibration moment, then an antenna is controlled to carry out cone scanning, iterative calculation is carried out through a solar radiation power variation coefficient so as to obtain a pointing deviation correction value of the corresponding scanning period,moreover, iteration correction is carried out on the antenna pointing direction, and finally, the above processes are repeated at different moments to obtain a plurality of groups of calculation values; and an equation set is constructed by utilizing an antenna pointing error correction model, a plurality of parameters in the error correction model are obtained through a minimization parameter fitting method, and an angle deviation value calculated through the error correction model is the pointing deviation of the antenna each time when the antenna is pointed in the follow-up process.

Description

technical field [0001] The invention relates to a pointing calibration method of a telemetry ground station, which is suitable for fast and high-precision calibration of antenna pointing errors of small telemetry ground stations. Background technique [0002] In recent years, the development of telemetry ground stations has entered the stage of commercialization, and the miniaturized and mobile commercial ground stations have begun to attract more and more attention from researchers. During the construction and use of the ground station, various system errors need to be calibrated and corrected to maintain the telemetry performance of the system. The antenna pointing calibration of the telemetry ground station is an important part of the ground station calibration. The traditional antenna pointing calibration usually uses the calibration tower method and the radio star method, but these two methods are not suitable for small and mobile commercial ground Both sites have inhe...

AI Technical Summary

Problems solved by technology

However, the traditional solar radiation source calibration has certain inherent defects, mainly because the sun has a certain angular diameter relative to the ground antenna, which is not an ideal point radiation source, making it difficult for the antenna to accurately align with the sun during pointing calibration. center

The angular diameter of the sun directly affects the accuracy of antenna calibration, which limits the practical application of this calibration method

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