Coregistration of Sentinel-1 TOPS Data for Interferometric Processing Using Real-Time Orbit

被引：0
|
作者：
Wu W. [1 ]
Li T. [2 ]
Long S. [1 ]
Zhou Z. [3 ]
机构：
[1] Hunan Province Key Laboratory of Coal Resources Clean-Utilization and Mine Environment Protection, Hunan University of Science and Technology, Xiangtan
[2] GNSS Research Center, Wuhan University, Wuhan
[3] Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2019年 / 44卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Cross correlation; Enhanced spectral diversity; Geometrical coregistration; SAR interferometry; Sentinel-1; Terrain observation by progressive scans;
D O I：
10.13203/j.whugis20170098
中图分类号：
学科分类号：
摘要：
An azimuth coregistration accuracy of 0.001 pixel is required for Sentinel-1 terrain observation by progressive scans (TOPS) interferometric processing, which is usually accomplished by a geometric coregestration and enhanced spectral diversity based on precise orbit information. However, the precise orbit information is distributed later than TOPS synthetic aperture radar (SAR) products, and the accuracy of real-time orbits is not high enough, which could result the phase of enhanced spectral diversity wrapped after geometric coregistration. We aim to improve the geometric coregistration accuracy using real-time orbits to meet the requirement of interferometric processing of Sentinel-1. Firstly, the windows centered by point scatterers are selected to perform the cross correlation coregistration. Then, multi-bursts results are mosaicked to improve the accuracy and reliability of cross correlation coregistration approach, which promises the coregistration accuracy for enhanced spectral diversity. Finally, this method is validated by a real case. © 2019, Editorial Department of Wuhan University of Technology. All right reserved.
引用
收藏
页码：745 / 750
页数：5
相关论文
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