Title :
Preprocessing to improve the quality of SAR interferogram
Author :
Ren, Kun ; Shi, Xiangquan ; Bian, Lei ; Wang, Feng ; Wu, Guang
Author_Institution :
Dept. of Electron. Eng., Nanjing Univ. of Sci. & Technol., China
Abstract :
In this paper, the preprocessing method for improving the quality of interferograms is described The method consists of three processing steps - azimuth filtering, range filtering and oversampling. It is shown that the first two steps are effective to eliminate the decorrelation caused by spectrum misalignment in azimuth and range and the oversampling can eliminate the error introduced by the aliasing because of convolution in frequency domain. The validity of the proposed method is verified by ERS SLC data.
Keywords :
convolution; geophysical signal processing; image sampling; radar imaging; radiowave interferometry; remote sensing by radar; synthetic aperture radar; terrain mapping; ERS SLC data; SAR interferometry; aliasing; azimuth filtering; convolution; data preprocessing; decorrelation elimination; frequency domain; oversampling; range filtering; spectral filtering; spectrum misalignment; Automation; Azimuth; Band pass filters; Convolution; Decorrelation; Filtering; Interferometry; Laboratories; Maximum likelihood estimation; Pattern recognition;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International
Print_ISBN :
0-7803-8742-2
DOI :
10.1109/IGARSS.2004.1369834
