NAME: DT_TM_MAK PURPOSE: Set up a time and date string from reference JD and offset. CATEGORY: CALLING SEQUENCE: s = dt_tm_mak(jd0, [sec]) INPUTS: jd0 = Julian Date of a reference date (0:00 hr). in sec = Seconds since JD0 at 0:00. in KEYWORD PARAMETERS: Keywords: FORMAT = format string. Allows output date to be customized. The default format string is 'Y$ n$ d$ h$:m$:s$ w$' The following substitutions take place in the format string: Y$ = 4 digit year. y$ = 2 digit year. N$ = full month name. n$ = 3 letter month name. 0n$= month as a 2 digit number. d$ = day of month number. 0d$= 2 digit day of month number. doy$= 3 digit day of year. W$ = full weekday name. w$ = 3 letter week day name. h$ = hour. m$ = minute. s$ = second. f$ = fraction of second (see DECIMAL, DENOMINATOR below). I$ = time interval in days to 2 decimal places. i$ = time interval in days as an integer. H$ = time interval in integer hours.