next up previous contents
Next: UV_TRACKS NOEMA Up: ASTRO language internal help Previous: TIME   Contents


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.  Stations  should  be  referred to by a
    mnemonic (e.g. E003, W000 ...) given 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.

    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)

    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.


Subsections

Gildas manager 2023-01-01