Title :
Phase-unwrapping of SAR interferogram with multi-frequency or multi-baseline
Author :
Xu, Wei ; Chang, Ee Chien ; Kwoh, Leong Keong ; Lim, Hock ; Cheng, Wang ; Heng, Alice
Author_Institution :
Centre for Remote Imaging, Sensing & Process, Nat. Univ. of Singapore, Singapore
Abstract :
The use of multiple InSAR images of the same area for phase unwrapping is discussed. It is shown that by combining the information in the two InSAR images, the ambiguity interval of the phase angle can be considerably lengthened, which will facilitate unwrapping. Three methods for combining multiple InSAR images are proposed and their error characteristics discussed.
Keywords :
geophysical techniques; radar applications; radar imaging; remote sensing by radar; synthetic aperture radar; topography (Earth); INSAR; SAR interferogram; ambiguity interval; geodesy; geophysical measurement technique; land surface topography; multi-frequency multi-baseline; multibaseline; multifrequency; multiple InSAR image; phase angle lengthening; phase unwrapping; radar remote sensing; same area; synthetic aperture radar; terrain mapping; Antenna measurements; Cathode ray tubes; Earth; Linear approximation; Noise robustness; Phase measurement; Pixel; Rain; Satellites; Synthetic aperture radar interferometry;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International
Print_ISBN :
0-7803-1497-2
DOI :
10.1109/IGARSS.1994.399243
