摘要
阐述了合成孔径雷达差分干涉测量(D-InSAR)的基本原理,分析了参考DEM误差和卫星轨道误差对雷达干涉相位的影响,导出了参考DEM误差和卫星轨道误差对差分干涉相位贡献灵敏度的函数关系式,得出了雷达差分干涉测量中轨道误差对相位贡献灵敏度要远远高于参考DEM误差对相位贡献灵敏度的结论。最后通过2003年伊朗Bam地震区ENVISAT-ASAR影像及粗轨数据、荷兰Delft大学提供的精密轨道数据以及美国地质勘探局的GTOPO30 DEM和NASA的SRTM3 DEM的实例验证了该结论的正确性。
The basic principle of D-InSAR is expounded, the influence of DEM error and satellite orbit error on radar interferometric phase are analyzed. The functional relation of the sensitivity of differential interferometric phase to reference DEM error and satellite orbit error is deduced. Conclusion is provided that the sensitivity ratio of phase to orbit error is much higher than to reference DEM error in radar differential interferometry. It proves to be correct by the ENVISAT-ASAR images and coarse orbit data from the earthquake shook area of Barn City in Iran in 2003, the precise orbit data provided by Delft University of Netherlands and GTOPO30 DEM of USGS and SRTM3 DEM of NASA .
出处
《遥感信息》
CSCD
2009年第2期3-6,共4页
Remote Sensing Information
基金
地球空间环境与大地测量教育部重点实验室基金(08-01-05)
