OBSERVATORY

##
OBSERVATORY

            [ASTRO\]OBSERVATORY [longitude latitude altitude [radius]]
                     or
            [ASTRO\]OBSERVATORY [Name] [Version] [Mode]

        Specify  an observatory by giving its geographic coordinates in degrees,
        and elevation in km above sea level. Caution: east longitudes are  posi-
        tive.  The fourth argument is the radius of the Sun avoidance circle, in
        degrees (default is 30 degrees).

        Example:  OBSERVATORY 44:23:12.0 +45:09:57.9 3.987 30.

        A number of observatories are pre-defined and can be  selected  directly
        be typing "OBSERVATORY Name". Type "OBSERVATORY ?" for the list of known
        telescopes.

        Without argument, the observatory name is translated  from  the  GAG_AS-
        TRO_OBS logical name.

        For  NOEMA,  PDBI,  PICO,  and ALMA, a version can be added as argument.
        This can be used to select the instrument capabilities, as done  by  SE-
        LECT PDBI|ALMA command in the past.

        For NOEMA, there is only one year possible for the time being (2017). In
        ASTRO, the switch to NOEMA observatory name has been placed at  the  de-
        livery of the NOEMA backend polyfix.

        For  PDBI  (observatory  can  be  PDBI or BURE), a year must be entered:
        1995, 2000, 2006, 2010, 2013, or 2015. They correspond to  the  upgrades
        of  the  receiver  system  (1995,  2006, and 2015) and of the correlator
        (2000, 2010, 2013).

        For PICO, the year can be 2016 or 2021.  2021  takes  into  account  the
        change  in  frequency coverage in 2021 (outer baseband folding frequency
        changed)

        For ALMA, the cycle number must be entered (0, 1, ...). Any number larg-
        er  than  the current cycle is equivalent to "OBSERVATORY ALMA FULL" and
        points to the full ALMA capabilities.

        For NOEMA, PDBI, ALMA, and 30m,  OBSERVATORY also enables some  specific
        commands  to  define  and visualize receiver and backend configurations.
        These commands are gathered together in the dedicated languages  NOEMA\,
        PDBI\,  PICO\  and ALMA\ (see e.g. HELP NOEMA\ for the list of available
        commands).

Subsections

- OBSERVATORY NOEMA
- OBSERVATORY PDBI
- OBSERVATORY ALMA