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- W2106838678 abstract "Methods have been developed and successfully tested for monitoring of the wet snow cover with ERS-1/2 SAR data during the length of the accumulation and melting season in various watersheds of the Swiss Alps. Based on this experience, the possibilities of snow cover mapping over large mountainous areas - e.g. almost the entire Swiss Alps and Prealps - using RADARSAT ScanSAR, and NOAA-AVHRR for comparison, are now evaluated. Pre-processing includes a careful geocoding of the SAR data on to the Swiss National Cartographic Reference System, applying geometric and radiometric corrections using a DEM and auxiliary data for image simulation and calibration. A change detection approach is employed to compare the two SAR-scenes. It is expected that the most important differences will result from vast changes in the snow cover. Since large parts of the Swiss Plateau were also snow covered in the winter scene, other changes in land cover are expected to have only minor influence. Hence, it will be possible to assess the total snow cover by combining the information gained from the SAR ratios with the relief information from the DEM. The NOAA-AVHRR images are classified independently by generating snow masks using a threshold-based method. The two resulting snow classifications are compared with each other, and with ground-based meteorological observations. A verification using a finer temporal resolution is desirable. The successful application of RADARSAT ScanSAR to snow mapping over large highly mountainous terrain will be of great significance, especially when clouds hamper the use of electrooptical satellite data. It will therefore be of great value to future snow hydrological applications, considerably widening the availability of remote sensing tools." @default.
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- W2106838678 date "2000-01-01" @default.
- W2106838678 modified "2023-09-23" @default.
- W2106838678 title "SMALL-SCALE MONITORING OF WET SNOWCOVER WITH RADARSAT-SCANSAR DATA" @default.
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