source: altifloat/nemed/convertjd.m @ 127

function [datejd]= convertjd(dategc)
%dategd is a 1x6 row vector containing [year month day hour minute second]

a = floor((14 - dategc(2))/12);
y = dategc(1) + 4800 -a;
m = dategc(2) + 12*a - 3;

%absolute julian days
datejdabs = dategc(3) + dategc(4)/24 + floor((153*m +2)/5) +365*y + floor(y/4) - floor(y/100) + floor(y/400) - 32045; 

%CNES julian days
datejd = datejdabs -2400000.5 - 33282; 


end