The Comiso algorithm is explained by [Comiso, 1986]. The algorithm is working directly on satellite measured brightness temperatures, and it uses two channels. The ice concentration is given by [Comiso, 1986]
where 
is the ice concentration,
is the measured brightness
temperature, 
is the water
tie-point and 
is a calculated
brightness temperature of ice. Formula
9 can be extended to calculate the multi-year ice fraction:
where 
is the multi-year
ice fraction, 
and 
are the multi-year ice and first-year ice tie-points, respectively.
The algorithm can use either the (37V,37H) or the (37V,19V) channels, and in the
former case, the algorithm is called polarization based Comiso algorithm (COMPOL).
Tim Flintholm Fink<tff@emi.dtu.dk>
