Smos, Ascat and In-situ Soil Moisture: a Comparison over the H-saf Area
نویسنده
چکیده
Remotely sensed soil moisture products derived from the Advanced SCATterometer (ASCAT) and from the Soil Moisture and Ocean Salinity (SMOS) radiometer are analyzed and compared. The comparison has been carried out within the framework of an activity aiming at validating the EUMETSAT Hydrology Satellite Application Facility (H-SAF) soil moisture products derived from ASCAT over Europe and North Africa. The data acquired from 2010 to 2012 have been used. A strategy has been set up in order to enable the comparison between products representing a volumetric soil moisture content, as those derived from SMOS, and a relative saturation index, as those derived from ASCAT. For specific sites, which belong to the International Soil Moisture Network, satellite products have been compared to the ground measurements of moisture gauges. In particular, the triple collocation (TC) technique has been evaluated and exploited, which is useful to estimate the relative amount of error affecting three different sources of soil moisture measurements.
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