Parameters valid in both TIME mode and SPECTRAL mode:
  AMPLITUDE,  PHASE,  REAL,  or  IMAGINARY:   referring  to   the
    visibility  in  the  subband(s),   sideband(s),   baseline(s)
    (or  antenna(s))  selected  by  SET  SUBBANDS, SET BANDS, SET
    BASELINES or  SET  ANTENNAS   commands.    Only   correlation
    scans will be plotted, not autocorrelations.

  AUTOCORR.   :   the  autocorrelation  power  measured  in   the
    subband(s),  antenna(s)  selected  by   SET   SUBBANDS,   and
    SET  ANTENNAS  commands.   Only autocorrelation scans will be
    plotted, (including calibration scans), not correlations.

Parameters valid in SPECTRAL mode only:

  CHANNEL :  channel number in the correlator (use ony  this  one
    if Fourier Transform has not been made).

  VELOCITY :  normally with respect to LSR.

  I__FREQUENCY : the frequency in the second IF (around 350 MHz).

  SKY__FREQUENCY : the sky frequency.  This should  be  the  line
    rest frequency if the velocity is correct.

Parameters valid in TIME mode only:

  U__COORD,  V__COORD,  RADIUS, ANGLE: referring to cartesian, or
    polar coordinates, in the (U,V) plane, of the baseline(s) se-
    lected by command SET BASELINES.

  TIME:  universal time (in hours, origin determined by the first
    plot made, may be reset by PLOT /RESET).

  SCAN:  the scan number

  NUMBER:  the observation number.

  RECORD:  the record number (1 to the number of plotted points).

  HOUR__ANGLE

  DECLINATION

  RMS__PHASE:   the  r.m.s.   of the  phase  of  the  average  of
    the non-flagged  subbands  of  the continuum  correlator,  in
    current  phase  units  (degrees  or  radians).   This  r.m.s.
    phase  is computed during the data compression.

  RMS__AMPLITUDE:  the r.m.s.  of the amplitude of  the   average
    of the non-flagged  subbands  of  the  continuum  correlator,
    in current amplitude units  (kelvins   or   janskys).    This
    r.m.s. amplitude is computed during the data compression.

  DELAY:  as  specified  for  specified  baseline  (differential,
    A1-A2 for baseline 12), or for the specified antenna(s).

  LO__RATE:  as specified for specified  baseline  (differential,
    as DELAY), or for the specified antenna(s).

  LO__PHASE:   as  used  for  specified  baseline  (differential,
    as DELAY), or for the specified antenna(s).

  CABLE__PHASE:  as measured for  specified  baseline  (differen-
    tial, as DELAY), or for the specified antenna(s).

  GAMME:  the current range (1 or 2) of the cable phasemeter.

  TOTAL__POWER:   the  total  power   measured   for   the   giv-
    en antenna(s), as measured by the connected detectors.

  LAMBDA, BETA, or FOCUS:  the scanning coordinates for  pointing
    and  focussing   scans   (arc  seconds,  or millimeters), for
    the specified antenna, or the moving  antenna  if  the  given
    baseline (if only one is moving).

  AZ__CORR: the azimuth collimation correction in arc seconds.

  EL__CORR:  the elevation collimation correction in arc seconds.

  FOC__CORR: the Z focus correction in millimeters.

  T00 ...  T04 : general test parameters (in data headers)

  T10 ...  T14 : test parameters (antenna based) (in  data  head-
    ers)

  TREC:  receiver temperature for the given antenna(s).

  TSYS :  Equivalent system temperature for  the  given  baseline
    (Geometrical  mean of Tsys for both  antennas),  or  for  the
    given antenna(s).

  PAMB, TAMB, HUMIDITY: measured atmospheric parameters.

  WIND__AVERAGE,  WIND__DIR_AV,  WIND__TOP,  WIND__DIR__TOP:  The
    wind in m/s and the wind direction in degrees, for 5 min. av-
    erages and maxima..

  QUALITY:  The  observation  quality as set with commands TAG or
    CURSOR.

  AZIMUTH, ELEVATION: Start azimuth and elevation for each  scan.

  AZ__ERR, EL__ERR: The tracking errors in arc seconds.

  AZ__PH,  EL__PH:  The azimuth and elevation for each record (as
    used for phase tracking).

  PARAL__ANGLE: Parallactic angle (angle between the vertical di-
    rection and the meridian plane)

  WATER:  Water  content of atmosphere (as set by the programmer,
    or measured with given antenna).

  ATM__EMISSION: From the output of the atmospheric monitor (nor-
    mally  the  1.3mm  receiver).  This is the measured radiation
    temperature of the atmosphere, in Kelvins  of  Rayleigh-Jeans
    equivalent radiation temperature.

  ATM__POWER: This is the output of the atmospheric monitor (nor-
    mally the 1.3mm receiver). It is the actual counts  that  ap-
    pear on the monitors during observations.


  ATM__REFERENCE:  The  atmospheric  emission used as a reference
    for the phase correction. This is  computed  by  the  command
    MONITOR.  The  phase  correction  will be proportional to the
    difference between the output of the atmospheric monitor  and
    this reference value.

  ATM__PHASE: The computed atmospheric phase correction.

  ATM__UNCORRPH: The phase  uncorrected from atmosphere.

  ATM__CORRPH: The phase  corrected from atmosphere.

  ATM__VALIDITY: 0 or 1 whether the phase correction has been de-
    clared valid or not.


  CAL__PHASE: The phase instrumental calibration curve.

  CAL__AMPLI: The amplitude instrumental calibration curve.

  AIR__MASS: The number of air masses (1/sin(elev))

  GROUND__EMIS: The ground emission in K (calibrated total power,
    with sky emission subtracted).

  EMISSION:   The total power detected in emission in K (ground +
    sky)

  TDEWAR1, TDEWAR2, TDEWAR3:  The  temperatures  in  the  3-stage
    cryogenerators.

  TCABIN,  TCHOP,  TCOLD: The temperatures of the receiver cabin,
    of the ambient load, and the equivalent  temperature  of  the
    cold load.

  WVRTAMB,  WVRTPEL: The temperature of the  water vapor radiome-
    ter (WVR) ambient load and peltier cooler.

  WVRTCAL1, WVRTCAL2, WVRTCAL3 : The channel gains for the 3 fre-
    quency bands.

  WVRREF1, WVRREF2, WVRREF3 : The average counts on reference ob-
    servation

  WVRAVER1, WVRAVER2, WVRAVER3 : The average  counts  on  current
    observation

  WVRAMB1,  WVRAMB2, WVRAMB3 : The average counts on last ambient
    measurement

  WVRTREC1, WVRTREC2, WVRTREC3 : The receiver temperatures

  WVRFEFF1, WVRFEFF2, WVRFEFF3 : The coupling factors to sky

  WVRMODE : The calibration mode

  WVRH2O, WVRPATH : The precipitable water vapor and  correspond-
    ing pathlength

  WVRTSYS1, WVRTSYS2, WVRTSYS3 : The system temperatures

  WVRDPATH1,  WVRDPATH1,  WVRDPATH3  :  The Kelvin to water vapor
    pathlength (model)

  WVRFPATH1, WVRFPATH2, WVRFPATH3 : The  Kelvin  to  water  vapor
    pathlength (empirical)

  WVRLIQ1, WVRLIQ2, WVRLIQ3 : The Kelvin to liquid water emission

  WVRDCLOUD1, WVRDCLOUD2, WVRDCLOUD3 : The Kelvin to liquid water
    pathlength (model)

  WVRTATM : The temperature of atmosphere

  WVRQUAL : The  quality code

  DH__WVR1, DH__WVR2, DH__WVR3 : counts of each WVR channel

  DH__WVRSTAT :  status word

  WVR__PHA__M : The WVR phase value (model)

  WVR__PHA__E : The WVR phase value (empirical)

  WVR__PHA__C : The WVR phase value due to Cloud (Model)

  tatm__s,  tatm__i  :  The  temperature of the atmosphere in the
    signal and image band

  REFC1, REFC2, REFC2: refraction coefficients.

  REFRACTION: refraction correction.
















































