TIMEUNIT

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definition The value field of this keyword shall contain a character string that specifies the time unit; the value should be one of those given in Table 34. This time unit shall apply to all time instances and durations that do not have an implied time unit (such as is the case for JD, MJD, ISO-8601, J and B epochs). If this keyword is absent, 's' shall be assumed. This record's comment: "Units for TSTART, TSTOP, TIMEZERO"
label TIMEUNIT
structuralPath hdu7_header.timeunit

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