摘要
干涉参数定标对于机载双天线InSAR系统的大面积高精度数字高程模型获取具有重要意义。为了高效地进行干涉参数定标,从双天线InSAR获取DEM的基本原理出发,构建一种考虑干涉相位偏置、基线长度和基线水平角三个参数的定标新模型,设计该定标模型的未知参数解算方案。利用GPS实测的高程控制点对中国科学院电子学研究所自主研制的机载双天线InSAR系统进行了干涉参数定标实验,统计利用定标后干涉参数反演地面高程的误差,验证该干涉参数定标模型及解算方案。
It is significant to calibrate interferometric parameters of dual-antenna airborne InSAR systems for deriving accurate DEMwith large areas. A new calibration model considering phase offset, baseline length and baseline angle was proposed in order to calibrate interferometric parameters effectively, which was induced from the basic theory of DEM deriving from InSAR. And its solution scheme was designed. The calibration experiments of in- terferometric parameters were done with height control points measured by GPS to calibrate the dual-antenna airborne InSAR system researched independently by Institute of Electronics, Chinese Academy of Sciences. The errors of heights derived with calibrated interferometric parameters were calculated, as validated the proposed calibration model and its solution algorithm.
出处
《测绘学报》
EI
CSCD
北大核心
2010年第1期76-81,共6页
Acta Geodaetica et Cartographica Sinica
基金
国家863计划(2007AA120302)
国家自然科学基金(40771142
40871213)
中国博士后科学基金
国家西部1:50000地形图空白区测图工程
关键词
合成孔径雷达干涉测量
定标
基线
相位偏置
高程控制点
interferometric synthetic aperture radar
calibration
baseline
phase offset
height control points
