| Title | Temporal Analysis of ERS-1 SAR Backscatter for Hydrology Applications |
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| Author | Crevier, Y; Pultz, T J; Lukowski, T I; Toutin, Th |
| Source | Canadian Journal of Remote Sensing 22, 1, 1996 p. 65-76, https://doi.org/10.1080/07038992.1996.10874638 |
| Year | 1996 |
| Alt Series | Earth Sciences Sector, Contribution Series 20041468 |
| Publisher | Informa UK Limited |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Released | 2014 07 31 |
| Abstract | A series of 12 ERS-1 SAR scenes are used to examine the effects of environmental conditions and human disturbance on radar backscatter from a variety of land cover targets of particular interest to
hydrological applications. Imagery covering the Ottawa region was acquired for the period of July 1992 through July 1993. This dataset was radiometrically calibrated using software developed at CCRS. The calibration process is essential for comparing
the radar backscatter of bare fields, pastures, wetlands, and forests in the 12 images. A precise geometric correction method was also applied to the multi-date images. In addition, a Landsat Thematic Mapper image was used to extract the training
areas that are representative of the land cover classes. Descriptive statistics (mean, standard deviation) are extracted from the ERS-1 SAR images for each land cover class. These statistics are used to generate temporal signatures. Associated
meteorological data and ground information are used in the interpretation of backscatter response. It is observed that bare fields and pastures are the surfaces that best reflect changes in soil moisture and the presence of frost in the soil. The
backscatter of wetlands appears more sensitive to frost than to changes in moisture. We also observed that the forest cover temporal signature is constant despite changes in moisture due to precipitation or temperature. |
| GEOSCAN ID | 218270 |
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