InSAR大气误差改正中的空间插值研究

徐佳; 关泽群; 何秀凤; 王江林

doi:10.3724/SP.J.1146.2006.01684

InSAR大气误差改正中的空间插值研究

doi: 10.3724/SP.J.1146.2006.01684

基金项目:

国家自然科学基金(60472097, 60502045)和海外杰出青年基金(60428101)资助课题

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出版历程
- 收稿日期: 2006-10-30
- 修回日期: 2007-10-08
- 刊出日期: 2008-04-19

Spatial Interpolation Methods for Correcting Atmospheric Effects Using Interferometric SAR

摘要

摘要: 该文针对利用辅助数据进行InSAR大气误差改正时存在的空间插值问题进行了详细探讨，分别利用模拟数据和GPS观测数据进行了实验。实验结果表明，相较于函数方法和统计方法，反距离加权法与Kriging方法是更适用的插值方法，而它们的插值效果会受到辅助数据的类型、精度及分布的影响，当辅助数据质量较高且呈规则分布时效果最好。另外，若在空间插值过程中考虑高程的影响，能明显提高插值精度，从而改善大气误差改正效果。
- 干涉SAR; 大气误差改正; 空间插值; 对流层延迟
Abstract: In this paper, the focusing has been on spatial interpolation in correcting atmospheric effects using Interferometric SAR based on external data. Several factors have been discussed separately by using both simulated data and GPS data. The results indicate that the inverse distance weighted and kriging interpolation methods are more suitable than the function method and statistical method. And the validity of calibration is influenced by the type and quality of external data. When the external data is precise and regular, the result will be the best. Moreover, the improved interpolation methods by incorporating terrain elevation information have proved to be better.

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参考文献(1)

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