CLASS is able to reduce skydip data. Skydip mode must be selected
using command
SET MODE SKYDIP
which also changes the prompt to SAS> (Skydip Analysis System).
Commands FIND, HEADER, GET, PLOT and WRITE may be used as
for Continuum and
Line modes, but the only other valid command is REDUCE
which fits the sky emission using atmospheric
information available in the data, and displays the results.