Enum Class ObservationDurationDescription

java.lang.Object
java.lang.Enum<ObservationDurationDescription>
nom.tam.fits.header.ObservationDurationDescription
All Implemented Interfaces:
Serializable, Comparable<ObservationDurationDescription>, Constable, IFitsHeader

public enum ObservationDurationDescription extends Enum<ObservationDurationDescription> implements IFitsHeader
This data dictionary contains FITS keywords that have been widely used within the astronomical community. It is recommended that these keywords only be used as defined here. These are the Keywords that describe the observation.
See Also:
  • Enum Constant Details

    • DATE_END

      public static final ObservationDurationDescription DATE_END
      The value field shall contain a character string that gives the date on which the observation ended. This keyword has the same format, and is used in conjunction with, the standard DATA-OBS keyword that gives the starting date of the observation. These 2 keywords may give either the calendar date using the 'yyyy-mm-dd' format, or may give the full date and time using the 'yyyy-mm-ddThh:mm:ss.sss' format.
    • ELAPTIME

      public static final ObservationDurationDescription ELAPTIME
      The value field shall contain a floating point number giving the difference between the stop and start times of the observation in units of seconds. This keyword is synonymous with the TELAPSE keyword.
    • EXPOSURE

      public static final ObservationDurationDescription EXPOSURE
      The value field shall contain a floating point number giving the exposure time of the observation in units of seconds. The exact definition of 'exposure time' is mission dependent and may, for example, include corrections for shutter open and close duration, detector dead time, vignetting, or other effects. This keyword is synonymous with the EXPTIME keyword.
    • EXPTIME

      public static final ObservationDurationDescription EXPTIME
      The value field shall contain a floating point number giving the exposure time of the observation in units of seconds. The exact definition of 'exposure time' is mission dependent and may, for example, include corrections for shutter open and close duration, detector dead time, vignetting, or other effects. This keyword is synonymous with the EXPOSURE keyword.
    • LIVETIME

      public static final ObservationDurationDescription LIVETIME
      The value field shall contain a floating point number giving the total integrated exposure time in units of seconds corrected for detector 'dead time' effects which reduce the net efficiency of the detector. The ratio of LIVETIME/ONTIME gives the mean dead time correction during the observation, which lies in the range 0.0 to 1.0.
    • ONTIME

      public static final ObservationDurationDescription ONTIME
      The value field shall contain a floating point number giving the total integrated exposure time of the observation in units of seconds. ONTIME may be less than TELAPSE if there were intevals during the observation in which the target was not observed (e.g., the shutter was closed, or the detector power was turned off).
    • TELAPSE

      public static final ObservationDurationDescription TELAPSE
      The value field shall contain a floating point number giving the difference between the stop and start times of the observation in units of seconds. This keyword is synonymous with the ELAPTIME keyword.
    • TIME_END

      public static final ObservationDurationDescription TIME_END
      The value field shall contain a character string that gives the time at which the observation ended. This keyword is used in conjunction with the DATE-END keyword to give the ending time of the observation; the DATE-END keyword gives the ending calendar date, with format 'yyyy-mm-dd', and TIME-END gives the time within that day using the format 'hh:mm:ss.sss...'. This keyword should not be used if the time is included directly as part of the DATE-END keyword value with the format 'yyyy-mm-ddThh:mm:ss.sss'.
    • TIME_OBS

      public static final ObservationDurationDescription TIME_OBS
      The value field shall contain a character string that gives the time at which the observation started. This keyword is used in conjunction with the standard DATE-OBS keyword to give the starting time of the observation; the DATE-OBS keyword gives the starting calendar date, with format 'yyyy-mm-dd', and TIME-OBS gives the time within that day using the format 'hh:mm:ss.sss...'. This keyword should not be used if the time is included directly as part of the DATE-OBS keyword value with the format 'yyyy-mm-ddThh:mm:ss.sss'.
  • Field Details

  • Constructor Details

  • Method Details