Vol. 5, No. 1, 129-136, 2006
Audrey Martini, Jean-Pierre Dedieu, Laurent Ferro-Famil, Monique Bernier and Eric Pottier
Abstract
Citation EARSeL European Association of Remote Sensing Laboratories, Strasbourg, France BIS-Verlag
This
paper proposes one original technique to map the snow extent in the French Alps
from SAR measurements using SIR-C fully polarimetric winter/summer data sets at
L and C-bands. The method relies on a multi-frequency two-step approach. Basic
natural media types, like surface and forest, are first discriminated over the
scene under observation from a polarimetric analysis of summer measurements at
L-band. Secondly, the presence of snow is then detected separately over each
media type using the H-A-a polarimetric decomposition theorem. An original PCVE (polarimetric
contrast variation enhancement) procedure provides optimal emission/reception
polarisation states that maximise the C-band winter to summer response of
snow-covered areas. The results are compared to Landsat optical images acquired
simultaneously.
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History
Submitted: 23 Feb 2005
Revised: 03 Nov 2005
Accepted: 27 Feb 2006
Published: 25 Apr 2006
Martini A, J-P Dedieu, L Ferro-Famil, M Bernier & E Pottier, 2006.
Snow extent mapping in alpine areas using polarimetric SAR data.
EARSeL eProceedings, 5(1): 129-136
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