一种新的分布式InSAR卫星等效相位中心模型  

A New Equivalent Phase Center Model of Distributed Spaceborne InSAR

作　　者：陈刚[1,2,3] 

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450052 [2]西安测绘研究所,陕西西安710054 [3]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2013年第6期29-33,共5页Geomatics Science and Engineering

摘　　要：为提高数据相干性，分布式InSAR卫星一般采用一发双收模式进行回波数据获取，其辅雷达成像基于双基工作模式，成像模型较为复杂，给后续地理编码和基线定标带来困难。本文提出了一种新的等效相位中心模型，通过逐点对干涉相位进行补偿，将辅雷达成像模型转换为常规单SAR的自发自收模式，使成像模型简化。理论分析和试验表明，该方法引入误差很小，基本可以忽略不计。In order to improve the correlation of data, the bistatic mode is usually adopted by distributed spaceborne InSAR to collect echo data. The slave radar works in bistatie mode as well and has complex imaging model, which makes difficulties for geocoding and baseline calibration. This paper presents a new equivalent phase center model that can transform the bistatic mode to monostatic mode and simplify the model by compensating interferometric phase pixel by pixel. It has been proved by theoretical analysis and simulation test that the model has a high accuracy and the errors can be ignored.

关 键 词：干涉合成孔径雷达 分布式卫星 等效相位中心 

分 类 号：P237[天文地球—摄影测量与遥感]