Multi-temporal, multi-frequency, and multi-polarization coherence and SAR backscatter analysis of wetlands

摘要: Abstract Despite recent research into the Interferometric Synthetic Aperture Radar (InSAR) technique for wetland mapping worldwide, its capability has not yet been thoroughly investigated Canadian ecosystems. Accordingly, this study statistically analysed interferometric coherence and SAR backscatter variation in a area located on Avalon Peninsula, Newfoundland Labrador, Canada, consisting of various classes, including bog, fen, marsh, swamp, shallow-water. Specifically, multi-temporal L-band ALOS PALSAR-1, C-band RADARSAT-2, X-band TerraSAR-X data were used to investigate effect frequency polarization, as well temporal baselines degree classes. maps also input features an object-based Random Forest classification scheme examine contribution these overall accuracy. Our findings suggested that baseline was most influential factor maintenance herbaceous wetlands, especially shorter wavelengths. In general, highest intermediate/low both X- C-band, depending classes baseline. The Wilcoxon rank sum test at 5% significance level found significant difference (P-value