Snow cover maps with satellite borne SAR - A new approach in harmony with fractional optical SCA retrieval algorithms.

Snow cover maps with satellite borne SAR - A new approach in harmony with fractional optical SCA retrieval algorithms.

Institutt: 
Norut
Type publikasjon: 
Tidsskrift
Publikasjonskanal: 
IEEE International Geoscience and Remote Sensing Symposium.
År: 
2009

The standard method for retrieving snow-covered area with C-band SAR is based on thresholding the ratio between a wet snow SAR image and a dry snow reference scene. A new approach is suggested here, where the snow cover fraction is retrieved by using a gradual transition between snow free and snow covered conditions. The paper discusses the method and applies it on a set of Radarsat data acquired in Norway in May 2003. A near simultaneous aerial optical image and data from field campaigns are used to verify the results.