Electrical axis optical calibration system of spaceborne microwave tracking-pointing radar and calibration method thereof

Abstract

The invention discloses an electrical axis optical calibration system of a spaceborne microwave tracking-pointing radar and a calibration method of the electrical axis optical calibration system. The electrical axis optical calibration system comprises a radar testing subsystem, a calibration subsystem, a radar device and a target simulation subsystem. The target simulation subsystem comprises a target simulation source, a two-dimensional testing rotary table, a two-dimensional testing rotary table controller connected with the two-dimensional testing rotary table, a two-dimensional scanning frame and a target simulation horn antenna arranged on the two-dimensional scanning frame. The calibration method comprises the first step of calibrating the mounting precision of a radar antenna and a driving mechanism, the second step of calibrating the consistency of a radar electric axis and a radar antenna mechanical axis and the third step of correcting the radar according to a calibration result. According to the electrical axis optical calibration system of the spaceborne microwave tracking-pointing radar and the calibration method, high-precision calibration can be carried out on the radar in a compact field, the requirement of the radar for the temperature, the humidity and the cleanliness of used environment is met, the non-contact calibration of the spaceborne microwave tracking-pointing radar is achieved, the used measuring instruments are small in number and high in precision, the calculation of data can be automatically completed, and the high precision and the high reliability of the radar are guaranteed.

Description

technical field [0001] The invention relates to the technical field of testing and testing of payloads in aerospace space, and in particular to an electric axis optical calibration system and a calibration method of a spaceborne microwave tracking and pointing radar. Background technique [0002] In the prior art, the spaceborne radar mainly ensures the consistency of the target information obtained in the radar measurement coordinate system and the spacecraft body coordinate system through the cubic mirror installed on the radar and the spacecraft body. Therefore, the accurate calibration of the rotation relationship between the radar measurement coordinate system and the cube mirror coordinate system can ensure that the spaceborne radar provides accurate and reliable target information to the spacecraft. To achieve this purpose, the installation accuracy of the radar antenna and the drive mechanism, and the consistency between the radar electrical axis and the antenna mech...

AI Technical Summary

Problems solved by technology

In order to obtain higher calibration accuracy, it is necessary to move the transponder repeatedly, which requires a lot of complicated measurement work

In addition, for non-cooperative and autonomous radars, the target simulator is usually used to simulate the target echo signal. It is not convenient to install the cube mirror on the target simulator (usually a horn antenna), and even if it is installed, it is difficult to ensure the installation accuracy.

Therefore, the calibration method given in this document cannot be effectively used for electrical axis calibration of spaceborne microwave tracking and pointing radar

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