SP-636 Envisat Symposium 2007
نویسندگان
چکیده
We present a methodology to validate land surface temperature (LST) retrieved from Advanced AlongTrack Scanning Radiometer (AATSR) data in heterogeneous areas. To this end, a set of algorithms based on Split-Window (SW) and Dual-Angle (DA) techniques has been proposed and evaluated with in situ measurements of LST obtained from field campaigns made in heterogeneous areas. These campaigns were carried out in Marrakech, Morocco and in Barrax, Spain, in the framework of the WATERMED, EAGLE and SPARC projects. The validation use Landsat and Chris/Proba images over the test sites. Level2 LST product has been evaluated over these heterogeneous areas. Results suggest applying LST algorithms over averaged AATSR images with a smoothing window filter of 2 x 2 pixels. Results show also that DA algorithms could not be applied over heterogeneous regions. A worse accuracy has been observed from the Level2 Product compared with other SW algorithm proposed.
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