期刊
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
卷 12, 期 7, 页码 1486-1490出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2015.2409885
关键词
Coregistration; interferometric SAR (InSAR); orbital tube; ScanSAR; spectral decorrelation; synthetic aperture radar (SAR); Terrain Observation by Progressive Scans (TOPS)
类别
资金
- European Space Agency [4000106082/12/NL/MP, 4000110587/14/I-BG]
The orbit for Earth observation satellite synthetic aperture radar (SAR) missions is maintained within an Earth-fixed orbital tube to ensure ground-track coverage repeatability and, consequently, to enable repeat-pass interferometric compatibility between data takes. In this letter, it is shown that the size of the orbital tube may affect the interferometric performance in terms of azimuth spectral decorrelation and azimuth coregistration accuracy under the presence of squint. These effects require special consideration for SAR burst modes, such as ScanSAR or TOPS (i.e., Terrain Observation by Progressive Scans). This letter presents and analyzes these aspects in the frame of the Sentinel-1 mission.
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