pcp_ssmi         1    0  0.500  3.000 10.000  0.000   !fnoc obs, 1 deg superob
 pcp_tmi          1    0  0.500  3.000 10.000  0.000   !tmi obs, 1 deg superob
 satid          use bias ob err  gross  b_pcp pg_pcp   
                   (mm/h)  error variational qc