HEADER
Keywords: class

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HEADER

            LAS\HEADER

        Displays some header information on the R Observation. The  FULL  format
        is  used,  with the informations selected in command SET FORMAT written.
        The lines written contain (in output order, but not all lines are neces-
        sarily present)
        - General information line:
            Scan number and version
            Source name
            Line name
            Telescope name
            Date of observation
            Date of last reduction
        - Position information line
            RA or l        right ascension or longitude (or azimuth)
            DEC or b       declination or latitude (or elevation)
            Equinox        if equatorial coordinates are used
            Offsets        (in current units)
            coordinate     Eq, Ga, Az
        - Quality information line:
            Quality of calibration (as defined by a SET QUALITY)
            Tau      opacity at zenith
            Tsys     system temperature (outside atmosphere).
            Time     total integration time on source (minutes)
            El       elevation of source
        - Spectral information lines (2):
            N        number of channel
            I0       reference channel (real)
            V0       velocity at reference channel
            Dv       velocity resolution (signed)
            F0       rest frequency at reference channel
            Df       frequency resolution (signed)
            Fi       image frequency at reference channel
        - Calibration information line:
            B_ef    Beam efficiency of telescope
            F_ef    Forward efficiency of telescope
            G_im    Gain in image band
        - Atmospheric information lines (2):
            H2O      millimeter of precipitable water vapor
            Pamb     ambient pressure
            Tamb     ambient (receiver cabin) temperature
            Tchop    Chopper temperature
            Tcold    Cold load temperature
            Tatm     Atmospheric temperature in the signal band
            Tau      Zenith opacity in the signal band
            Tatm_i  Atmospheric temperature in the image band
            Tau_i   Zenith opacity in the signal band
        - Continuum Drift information lines (2) :
            N        Number of points
            I0       Reference point
            A0       Angle offset at reference point
            Da       Angular spacing between points (signed).
            F0       Observing frequency
            Df       Band pass
            Pos. Ang. : Position angle of the drift.
        followed by the list of Scan numbers added in the observation.