卫星遥感雷达参数现场原位校准技术综述

Review of In-situ Calibration Technology for Satellite Remote Sensing Radar Parameters

文中介绍了卫星遥感雷达参数现场原位校准技术,该技术指标包括总体指标及分系统指标两部分,文中重点分析并改进了雷达分系统的单项指标校准方法;同时,对传统校准方法存在的问题提出改进措施。基于整体的校准以及间接耦合的方法,要先拆掉卫星遥感雷达设备再进行外场校准,此时将会产生一些不良影响,所以需要消除这些影响。静态校准和动态校准是改进雷达综合指标的原位校准方法,对于静态校准来说,转换速度值为频率值,并在具有极高准确度的全站仪中接收雷达的静态测角以及测距数据;对于动态校准来说,基于有轨遥控式移动靶车与高精准差分GPS测量系统相结合,从而在校准雷达测量精度范围之内实现动态测角并确保测距准确度。

The in-situ calibration technology of satellite remote sensing radar parameters is introduced. The technical index of satellite remote sensing radar includes the overall index and subsystem index and the single index calibration method of radar subsystem is analyzed and improved. Meanwhile, the improvement measures are put forward for the problems existing in the traditional calibration methods. Through the overall calibration and indirect coupling method, satellite remote sensing radar equipment needs to be dismantled before field calibration is done. This will cause some adverse impacts which need to be solved. Static calibration and dynamic calibration are the in-situ calibration methods to improve radar comprehensive index. In the static calibration, the velocity value is converted into the frequency value, and the radar static angle measurement and ranging data are received in the tolal station with extremely high accuracy;in the dynamic calibration, the existing rail remote control mobile target vehicle is used to cooperate with the high accuracy differential GPS measurement system to complete the dynamic angle measurement within measurement accuracy range of calibration radar, and ensure distance measurement accuracy.