Space target surveillance radar baseline pointing correction method based on precise ephemeris

Abstract

The invention discloses a space target monitoring radar baseline pointing correction method based on precise ephemeris, belongs to the technical field of spaceflight, and can meet the high-precision measurement requirement of a space target monitoring radar. The method comprises steps of acquiring actual angle measurement data and theoretical angle measurement data of the space target monitoring radar for a precision ephemeris satellite; constructing an equation set of pointing correction amounts of an L base line and an M base line, and solving the equation set to obtain the pointing correction of the L base line and the M base line; averaging the pointing correction amount in the current iteration process, obtaining correction average values pointed by the L base line and the M base linein the current iteration process, if the correction amount average value is greater than a set error threshold, calculating N actual angle measurement data in the (p+1)th iteration process of the L base line and the M base line, executing next iteration, otherwise, ending the iteration, respectively accumulating all correction amounts in the iteration process as the final pointing correction amounts of the L base line and the M base line, and realizing base line pointing correction of the space target monitoring radar.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a method for correcting the baseline pointing of a space target surveillance radar based on precise ephemeris. Background technique [0002] Ground-based radar is the backbone equipment for space target monitoring. In order to effectively complete space target monitoring tasks, it is necessary to use radar sparse observation data to carry out high-precision space target orbit determination, which requires extremely high accuracy of ranging and angle measurement of ground-based radar. However, for higher power gain and angle measurement accuracy, space target surveillance radars are generally designed to be relatively large, and the length of the radar baseline is relatively long, especially similar to the "electronic fence" in the United States, the interferometer baseline is several hundred meters long . During the installation and commissioning of large-scale radar antennas...

AI Technical Summary

Problems solved by technology

[0003] However, the angle measurement data of the radar is calculated based on the phase center and pointing of the radio wave, not the physical size center of the antenna. Due to various system deviations, it is difficult to correct the phase pointing of the radio wave with the traditional method based on geodetic survey, and the measurement Accuracy is also difficult to meet the index requirements

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