Observations

-from

Number of first observation.

-to

Number of last observation.

-list

Comma separated list of observation numbers. Colons indicate a range. For example, `1,2,4:6,10' means 1,2,4,5,6,10.

-file

File name (relative to current directory) of a flat ASCII text file containing a list of observation files to be reduced, one file per line.