UV_TRACKS

        [ASTRO\]UV_TRACKS  station1  station2  [station3   [...]]    [/FRAME
    [size]]   [/HORIZON  Elmin]  [/HOUR_ANGLE  Hmin [Hmax]] [/INTEGRATION t]
    [/STATIONS ALL|list]  [/TABLE  [Name]]  [/WEIGHT  Mode]  [/SIZE  [Size1]
    [NantSize1]  [Size2] [NantSize2] ...]  [/OFFSET offset]

    Plot  interferometer  UV  coverage  as observed with the interferometer.
    The default is for NOEMA, but the command is more  general  and  can  be
    used with any array, especially ALMA or SMA.

    Station  coordinates  are  searched  for  in the file defined by the AS-
    TRO_STATIONS logical variable. The default file contains NOEMA stations.
    It can be customized using the SIC LOG ASTRO_STATIONS YourFile command.

    Some  configuration  files for NOEMA, ALMA, and SMA are distributed with
    gildas and can be used as ASTRO_STATIONS files combined  with  UV_TRACKS
    ALL to avoid typing a lot of station names (see HELP UV_TRACKS NOEMA|AL-
    MA|SMA)

    Stations should be referred to by a mnemonic (e.g. E003, W000 ...)  giv-
    en  as  arguments  of  UV_TRACKS.  Note that with the contruction of the
    NOEMA track extension the mnemonic names  changed  from  [E,N,W]+2digits
    for  the  station number to [E,N,W]+3digits for the station number.  Old
    names are still accepted during a transition period.

    The size of the antennas can be specified with the /SIZE option.

    The /STATIONS option allows to use the ranks of the stations in the file
    rather than the mnemonic names.

    The  coordinates of the most recently selected SOURCE or PLANET are con-
    sidered. The frequency of the simulated observation is read from the Sic
    FREQUENCY variable (which is also set by LET FREQUENCY command).

    UV_TRACKS  can be used iteratively, to simulate the observations of sev-
    eral configurations. Option /FRAME indicate the start of a new  observa-
    tions:  if  not present, configurations are being stacked on the current
    UV coverage. The user may select another color pen to  distringuish  be-
    tween the various coverages. A sketch of the interferometer described by
    ASTRO_STATIONS is also drawn, and  the  selected  stations/antennas  are
    highlighted.