Retrieval of Sea Ice and Snow Parameters ...
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Angl. vi Indd.nQt; 45 6tt-100 ~--------~ __________ L-________ ~
Fall
Mid-Winter
Spring
Fait No Snow. Frozen GrOUnd
Mid-Wilier. 50 - eo an Dry Snow
Sping: 2!i - eo em Wet Snow
539
Figure 19.8: Experimental behavior of 94-GHz brightness temperature for various land-use
categories under different snow conditions (Hallikainen et al., 1994).
o...-.c.,
·s
-6
WET l.ANll
DRY1.AND
DRY SNOW
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Figure 19.9: ERS-1 SAR-derived backscattering coefficient for various snow/soil surfaces in
the Sodankylii test site, northern Finland (Koskinen et al., 1994). Each point represents the
average backscattering coefficient for clear-cut areas in an ERS-1 SAR image.
S [mm/K]
= 10.1
= 8.7
= 3.84
ST D for southern Finland
ST D for northern Finland
SG for Finland, Canada, Russia