基于地面接收机的星载合成孔径雷达天线波束方位指向精确测量方法

An Accurate Measurement Method for Azimuth Pointing of Spaceborne Synthetic Aperture Radar Antenna Beams Based on Ground Receiver.

机构信息

Key Laboratory of Technology in Geo-Spatial Information Processing and Application Systems, Chinese Academy of Sciences, Beijing 100190, China.

Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China.

出版信息

Sensors (Basel). 2018 Aug 10;18(8):2626. doi: 10.3390/s18082626.

DOI:10.3390/s18082626

PMID:30103425

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6111414/

Abstract

The paper proposes a new method for measuring the azimuth pointing of spaceborne synthetic aperture radar (SAR) antenna beams based on the ground receiver, which can receive and record complex sampling data of the pulse signals transmitted from the spaceborne SAR. The center of the antenna pattern is extracted from the complex sampling data amplitude envelope to obtain the time when the beam main lobe center irradiates the ground receiver, and the range migration information is extracted from the complex sampling data to obtain the time when the satellite is over the top of the ground receiver. The results of Chinese civilian remote sensing GaoFen-3 SAR satellite experiment data processing show that the measurement accuracy of this method is better than 0.002°, which can be applied to the accurate measurement of azimuth pointing of various low Earth orbit (LEO) SAR antenna beams.

摘要

该论文提出了一种基于地面接收机的星载合成孔径雷达（SAR）天线波束方位指向测量新方法，该接收机能够接收和记录星载 SAR 发射的脉冲信号的复采数据。从复采数据的幅度包络中提取天线方向图的中心，以获得波束主瓣中心照射地面接收机的时间，并从复采数据中提取距离徙动信息，以获得卫星飞越地面接收机顶部的时间。中国民用遥感高分三号 SAR 卫星实验数据处理结果表明，该方法的测量精度优于 0.002°，可应用于各种低地球轨道（LEO）SAR 天线波束的方位指向精确测量。