提出一种利用条带间连接点进行多条带干涉定标的方法.该方法利用条带间重叠区的连接点作为控制点,既实现了多条带数据的干涉定标,又有效减少了地面控制点数量. 实验结果表明,该方法可以准确获取各条带的干涉定标参数,并能解决实际应用中大量布设地面控制点的问题,降低了外定标工作的困难.
Calibration of multi-strip airborne InSAR data is needed in order to generate DEMs over large areas.We propose an interferometric calibration method for multi-strip InSAR data.The method can reduce the GCP number using connected points in the overlap area between strips and is shown to be effective by the experimental simulation. The results indicate that the interferometric parameter error of each strip can be calibrated accurately with a reduced number of GCP which could reduce the difficulty of InSAR outer calibration.
[1] Ferretti A, Monti-Guarnieri A, Prati C, et al. InSAR principles: guidelines for SAR interferometry processing and interpretation[M]. Netherlands: ESA Publications, 2007: A17-A23.
[2] Crosetto M. Calibration and validation of SAR interferometry for DEM generation[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2002, 57(3): 213-227.
[3] Mallorqui J J, Rosado I, Bara M. Interferometric calibration for DEM enhancing and system characterization in single pass SAR interferometry //IEEE International Geoscience and Remote Sensing Symposium. Sydney, 2001, 1: 404-406.
[4] 王彦平. 机载干涉SAR定标模型与算法研究 . 北京: 中国科学院电子学研究所, 2003.
[5] 李品. InSAR系统的定标方法研究 . 合肥: 中国科学技术大学, 2008.
[6] 张薇. 机载双天线干涉SAR定标方法研究 . 北京: 中国科学院电子学研究所, 2009.
[7] Mora O, Perez F, Pala V, et al. Development of a multiple adjustment processor for generation of DEMs over large areas using SAR data //IEEE International Geoscience and Remote Sensing Symposium. Beijing, 2003, 4: 2326-2328.
[8] Jin G W, Zhang W, Xiang M S, et al. A new calibration algorithm of interferometric parameters for dual-antenna airborne InSAR[J]. Acta Geodaetica et Cartographica Sinica, 2010, 39(1): 76-81(in Chinese). 靳国旺, 张薇, 向茂生,等. 一种机载双天线InSAR干涉参数定标新方法[J]. 测绘学报, 2010,39(1): 76-81.
[9] Richards M A. A beginner's guide to interferometric SAR concepts and signal processing[J]. IEEE Aerospace and Electronic Systems Magazine, 2007, 22(9): 5-29.
