| Autor: |
D. Vidal-Madjar, Philippe Olivier, Anne-Laure Cognard, M. Normand, A. Vidal, Sami Louahala, Catherine Ottlé, C. Loumagne |
| Rok vydání: |
1995 |
| Předmět: |
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| Zdroj: |
Water Resources Research. 31:975-982 |
| ISSN: |
0043-1397 |
| DOI: |
10.1029/94wr03390 |
| Popis: |
One of the possible applications of satellite radar remote sensing is to estimate surface soil moisture. To evaluate the capacity of ERS 1/synthetic aperture radar (SAR), a European Space Agency (ESA) pilot project has been set up. The test site is a small agricultural watershed situated in the central part of French Brittany. During 1992 and 1993, almost all possible SAR images were acquired together with two types of ground truths: intensive ground measurements during 14 field campaigns and point automatic measurements over the entire period. From the comparison of those ground truth data with the ERS 1 images, the following results are obtained. On a field scale the relation between the radar signal and the surface soil moisture depends strongly on the type of culture: Correlation is poor for the different cultures except for wheat. On a basin scale, it is shown that during the period of low vegetation density, there is a linear correlation between the mean radar data and the point automatic measurements. This last result is very encouraging and could open the way to hydrological applications. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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