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
    necessarily 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)
        Epoch if equatorial coordinates are used
        Offsets in current units
        Type of 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.