期刊
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷 46, 期 8, 页码 2167-2184出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2008.917271
关键词
forestry; hydrology; interferometry; scattering; synthetic aperture radar (SAR); vegetation; water
类别
资金
- ESA [2853]
- SAR
- USGS Director Venture Capital Fund
- USGS Eastern Region Venture Capital Fund
- USGS Land Remote Sensing Program
- NASA Solid Earth & Natural Hazards Program [SENH-0000-0229]
- USGS [O3CRCN0001]
Detailed analysis of C-band European Remote Sensing 1 and 2 (ERS-1/ERS-2) and Radarsat-1 interferometric synthetic aperture radar (InSAR) imagery was conducted to study water-level changes of coastal wetlands of southeastern Louisiana. Radar backscattering and InSAR coherence suggest that the dominant radar backscattering mechanism for swamp forest and saline marsh is double-bounce backscattering, implying that InSAR images can be used to estimate water-level changes with unprecedented spatial details. On the one hand, InSAR images suggest that water-level changes over the study site can be dynamic and spatially heterogeneous and cannot be represented by readings from sparsely distributed gauge stations. On the other hand, InSAR phase measurements are disconnected by structures and other barriers and require absolute water-level measurements from gauge stations or other sources to convert InSAR phase values to absolute water-level changes.
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