机载毫米波 SAR 垂直航向运动补偿分析与比较

摘要

在机载 SAR 实测数据处理中，垂直航向运动补偿是一个很重要的处理步骤。垂直航向运动补偿需要考虑沿视线向位移、方位波束宽度等因素对补偿效果的影响。本文以机载毫米波高分辨斜视 SAR 数据为研究背景，对几种常用的垂直航向运动补偿方法进行了分析与比较。仿真表明，斜视角较大或垂直航向运动误差较大时，当前几种补偿方法或多或少存在补偿结果不理想的现象，故需要研究新的垂直航向运动补偿方法，本文仿真与分析结果也可为毫米波 SAR 大斜视、高分辨实测数据处理提供参考。%Since vertical course motion compensation is an important processing procedure in airborne SAR real measured data processing,the compensation effect factors like displacement along sightline direction,azimuth beam width and etc.should be considered for vertical course motion compensation.Several common methods of vertical course motion compensation are analyzed and compared with airborne MMW high resolution squinting SAR data. The simulation indicates that there are more or less unsatisfied compensating results for the current compensating methods when the squinting angle is wider or vertical course motion error is larger.It is required to study a new ver-tical course motion compensation method.The simulation and analysis result can be used as reference for MMW SAR wider squinting angle and high resolution real measured data processing.