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

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

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Parameters valid in SPECTRAL mode only:

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

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VELOCITY :  normally with respect to LSR.

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I__FREQUENCY : the intermediate frequency in the data.

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

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IF1 : the frequency in the first IF frequency

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IF2 : the frequency in the second IF frequency

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IF3 : the frequency in the third IF frequency

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Parameters valid in TIME mode only:

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

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

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SCAN:  the scan number

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NUMBER:  the observation number.

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

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HOUR__ANGLE

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DECLINATION

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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.

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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.

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

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

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

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LO1__FREQ: LO1 frequency

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LO1__REF: LO1 ref frequency

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

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CABLE__ALTERNATE: idem for the unused reference

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

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

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TOT__SCALE: scaling factor to go from cts to K for total power

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DH__ACTP[1_-8]: the total power measured in the autocorrelation (NB correlator)

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DH__ANTTP: the total power measured in the warm IF cartridge

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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).

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AZ__CORR: the azimuth collimation correction in arc seconds.

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EL__CORR: the elevation collimation correction in arc seconds.

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FOC__CORR: the Z focus correction in millimeters.

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T00 ...  T09 : general test parameters (in data headers)

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T10 ...  T29 : test parameters (antenna based) (in data headers)

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

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

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PAMB, TAMB, HUMIDITY: measured atmospheric parameters.

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WIND__AVERAGE, WIND__DIR__AV, WIND__TOP, WIND__DIR__TOP: The wind in m/s and
the wind direction in degrees, for 5 min. averages and maxima..

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

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

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AZ__ERR, EL__ERR: The tracking errors in arc seconds.

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

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PARAL__ANGLE: Parallactic angle (angle between the vertical
direction and the meridian plane)

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

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ATM__EMISSION: From the output of the atmospheric monitor (normally
the 1.3mm receiver). This is the measured radiation temperature of the
atmosphere, in Kelvins of Rayleigh-Jeans equivalent radiation
temperature.

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ATM__POWER: This is the output of the atmospheric monitor
(normally the 1.3mm receiver). It is the actual counts that appear on
the monitors during observations.


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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.

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ATM__PHASE: The computed atmospheric phase correction.

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ATM__UNCORRPH: The phase  uncorrected from atmosphere.

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ATM__CORRPH: The phase  corrected from atmosphere.

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ATM__VALIDITY: 0 or 1 whether the phase correction has been declared
valid or not.


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CAL__PHASE: The phase instrumental calibration curve.

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CAL__AMPLI: The amplitude instrumental calibration curve.

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

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

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

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

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

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

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WVRTCAL1, WVRTCAL2, WVRTCAL3 : The channel gains for the 3 frequency bands.

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WVRREF1, WVRREF2, WVRREF3 : The average counts on reference observation

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

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

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WVRTREC1, WVRTREC2, WVRTREC3 : The receiver temperatures

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WVRFEFF1, WVRFEFF2, WVRFEFF3 : The coupling factors to sky

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WVRMODE : The calibration mode

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WVRH2O, WVRPATH : The precipitable water vapor and corresponding pathlength

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WVRTSYS1, WVRTSYS2, WVRTSYS3 : The system temperatures

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

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

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

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

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WVRTATM : The temperature of atmosphere

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WVRQUAL : The  quality code 

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DH__WVR1, DH__WVR2, DH__WVR3 : counts of each WVR channel

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DH__WVRSTAT :  status word

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WVR__PHA__M : The WVR phase value (model)

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WVR__PHA__E : The WVR phase value (empirical)

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

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

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REFC1, REFC2, REFC2: refraction coefficients.

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REFRACTION: refraction correction.

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ATTENUATION: attenuation in the warm IF cartridge

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LILEVL[01\-12]: tweak level (LSB for DSB correlator)

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LILEVU[01\-12]: tweak level (USB for DSB correlator)

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TIM[01\-04]: timing parameters

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LASER__LEVEL : optical power in the fiber optic Rx

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HIQ__ATTEN[1-2]: high-Q cable attenuation

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WIDEX__TEMP[1-4]: WIDEX unit temperatures

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INCLIX, INCLIY: station inclination (/X,/Y)

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INCLI__TEMP: inclinometer temperature

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