PS-ESD: Persistent Scatterer-Based Enhanced Spectral Diversity Approach for Time-Series Sentinel-1 TOPS Data Co-Registration
发布时间:2024-06-24
点击次数:
DOI码:10.1109/LGRS.2022.3201356
发表刊物:IEEE Geoscience and Remote Sensing Letters
关键字:Amplitude dispersion index (ADI), co-registration, enhanced spectral diversity (ESD), persistent scatterer (PS), terrain observation with progressive scan (TOPS)
摘要:In Sentinel-1 terrain observation with progressive scan (TOPS) mode, this azimuth sweeping introduces an extra high-frequency Doppler term into the impulse response function, which requires the azimuth co-registration accuracy of 0.001 pixels to make the interferometric phase difference of adjacent bursts less than 3°. The enhanced spectral diversity (ESD) and developing versions are usually used to correct such residual azimuth misregistration. However, in fast decorrelation scenario, the distributed scatterers (DSs)-based ESDs need to perform lots of complex data processing to reduce the decorrelation impact on high-precision co-registration, including multilooking, spatial filtering, network construction, and least square adjustment. The DS-based co-registration methods are complicated and inefficient, which is not suitable for big synthetic aperture radar (SAR) data processing. Therefore, this letter proposes a persistent scatterers-based ESD (PS-ESD): to estimate the amplitude dispersion index (ADI) with double samples over the burst overlap regions and select the satisfied PS pixels to compute the double differential phase under the one-master interferometric framework for correcting the time-series azimuth shifts. Based on the Sentinel-1 TOPS SAR data over the mountainous area in Three Gorges, China, experimental results have demonstrated that the proposed PS-ESD can achieve higher co-registration accuracy and faster convergence rate, especially in the case of dynamic co-registration of newly added TOPS images.
合写作者:Hu Chihao, Luo Xingjun
论文类型:期刊论文
通讯作者:Wang Changcheng
学科门类:工学
文献类型:J
卷号:19
页面范围:1-5
是否译文:否
发表时间:2022-08-24
发布期刊链接:https://ieeexplore-ieee-org-s.vpn.whu.edu.cn/document/9866030