中文摘要：

针对目前新型SAR传感器数据产品预处理软件缺乏的现状,全面细致地论述了ENVISAT ASAR,Radarsat2,Cosmoskymed,Terra SAR-X和Sentinel1等5种新型SAR传感器的一级地距产品（level-1 detected ground range product,L-1 DGRP）数据的绝对辐射定标方法以及软件化过程中所涉及的后向散射系数等参数获取方法;并以Sentinel1传感器的L-1 DGRP数据为例,采用C＋＋语言编程实现了绝对辐射定标过程;最后将本文方法软件处理结果和欧空局S1 Tool Box软件处理结果进行对比,二者得到的后向散射系数值基本相同,证实了本文所介绍方法的正确性。

英文摘要：

For the current situation of the lack of the new SAR sensor data preprocessing software, this paper introduced in detail the methods of absolute radiometric calibration and the parameter acquisition for several new SAR sensor level - 1 detected products, such as ENVISAT ASAR, Radarsat2, Cosmoskymed, TerraSAR - X and Sentinell. In addition, the absolute radiometric calibration process was achieved by programming with the level - 1 detected ground range products（ L- 1 DGRP） data of Sentinell sensor, and C ＋ ＋ programming language was used to achieve the absolute radiation of the calibration process. At last, the radiometric calibration results produced by the method developed in this paper and implemented in the authors＇ software were compared with those by ESA S1 ToolBox, the freely distributed SAR data processing tool by European Space Agency, and it is shown that the two numerical back scattering systems are basically the same. The radiometric calibration method developed in this paper is proved to be correct by the program implementation.