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Net1DComp_LWP.m
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Net1DComp_LWP.m
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function [V,L] = Net1DComp_LWP(Tb23,Tb31)
% Pauline comment : If I understand well
% outputs V = IWV in kg/m2
% outputs L= LWP in kg/m2
% inputs = brightness temperature measurements in K at 23 and 31 GHz
% DEFINE CONSTANTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% CHAN #1
Tb01 = 8; % offset
SV1 = 1.3; % V sensitivity
SL1 = 35; % L sensitivity
% CHAN #2
Tb02 = 10; % offset
SV2 = 0.4; % V sensitivity
SL2 = 57; % L sensitivity
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Coefficients for Dual-channel retrieval %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
det = 1 / (SL2*SV1 - SL1*SV2);
c0 = (SL1*Tb02 - SL2*Tb01) * det;
c1 = SL2 * det;
c2 = -SL1 * det;
d0 = (SV2*Tb01 - SV1*Tb02) * det;
d1 = -SV2 * det;
d2 = SV1 * det;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Computing Dual-channel retrieval %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
V = c0 + c1*Tb23 + c2*Tb31;
L = d0 + d1*Tb23 + d2*Tb31;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
if L<0
L=0;
end
return