% yyyymmddhhmm     segJulA     IWV  
%    (GMT)          (GMT)     kg/m2 
 201205140000     390225600     54.7615
 201205140030     390227400     54.6530
 201205140100     390229200     54.0413
 201205140130     390231000     55.6206
 201205140200     390232800     55.7189