Title :
Phase unwrapping for SAR interferometry
Author :
Loffeld, Otmar ; Krämer, Rainer
Author_Institution :
Inst. fur Nachrichtenverarbeitung, Siegen Univ., Germany
Abstract :
Presents an approach to unwrap and simultaneously filter the phases of interferometric SAR (ISAR) images. The approach works in the state space domain and utilizes an extended linearized Kalman filter. Rather then first generating the phase profile from the complex interferogram and then trying to unwrap it, the filter directly utilizes the inphase and quadrature component of the complex interferogram to estimate and unwrap the phase. The paper outlines the basic idea and presents first results
Keywords :
Kalman filters; geophysical signal processing; geophysical techniques; phase estimation; radar applications; radar imaging; radar theory; radiowave interferometry; remote sensing by radar; spaceborne radar; synthetic aperture radar; ISAR; SAR interferometry; complex interferogram; filter; geophysical measurement technique; inphase; interferometric SAR; land surface terrain mapping; linearized Kalman filter; phase unwrapping; quadrature component; radar image processing; radar imaging; radar remote sensing; signal processing; state space domain; synthetic aperture radar; Baseband; Filtering; Filters; Interferometry; Noise level; Phase estimation; Phase noise; Pixel; Signal to noise ratio; State-space methods;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International
Conference_Location :
Pasadena, CA
Print_ISBN :
0-7803-1497-2
DOI :
10.1109/IGARSS.1994.399714
