cktime -- Checks that a time column is Time ordered.
cktime filename[ext#] column yes
This task simply checks to see if a time column in a FITS file is time ordered, that is that the times are always increasing with each row. An option is available to also check for multiple occurrences of a time value in the time column. This task is useful for testing the various house keeping files that are used to build "Good Time Intervals". The presence of out of time order rows and optionally equal value rows is sent to the terminal.
1. Check if the TIME column in the first extension of the hk.fits file is in time order and report equal time values also:
ft> cktime hk.fits[1] TIME yes
2. Check if the TIME column in the first extension of the hk.fits file is in time order but do not report equal time values also:
ft> cktime hk.fits[1] TIME no
hkexpand, maketime, fmemsort, fsort