Jan 5, 2004
Final stage of reprocessing Umkehr data using FAP03 algorithm.

RT - retrieved (using Umkehr Dobson C-pair retrieval algorithm UMKV8)
OBS - observed Umkehr measurements (so-called N-values)
SZA - solar zenith znagle

Description of files:
STN014-Tateno
STN035-Arosa
STN067-Boulder

60 or 70 means that data werer normalized to the measurement at either 60 or 70-degrees SZA


Format of the FR file:
DD MM YY BSZA ESZA TO_OB TO_RT FR(1:12)
            1           8          57           3          12         279
   0.2805847       999.0000       999.0000       1.531059       1.231578    
    1.363350       1.189868       2.083528       1.171706       1.821848    
    1.265991      0.8376523       3.078172    
DD is day
MM is month
YY is year
BSZA is the index (from 1 to 12) of the highest SZA for observed Umkehr measurement
(index 1 through 12 corresponds to 12 nominal SZAs: 60, 65, 70, 74, 77, 80, 83, 85, 86.5, 88, 89, 90 degrees)
ESZA is the index (from 1 to 12) of the lowest SZA for observed Umkehr measurement
TO_OB is observed total ozone (TO, DU)
TO_RT is retrieved TO (atm-cm=DU/100)
FR is the final residual (difference between RT and OBS N-value) at 12 nominal SZAs