SCUBA data files have the following naming convention: string_obs type_run number.sdf. Where string is either the UT date of the observation in YYYYMMDD format or the PATT ID for the observation.
Therefore the first data from 23rd June 1997 will be in files
for the demodulated and reduced data respectively.% ls 19970623_dem_0001.sdf 19970623_red_0001.sdf
The RO file contains the reduced data calculated by the telescope during the
observation and supplies a first look at the data. At present the on-line
system does not produce calibrated publishable quality images - the data
should be re-processed using the demodulated data and SURF.
SURF -- SCUBA User Reduction Facility