This
application takes a SCUBA demodulated data file and splits the data array up into its various ‘planes’;
data, variance and quality. In addition, the application reduces the component switches of an exposure
to give the exposure result. Optionally, the routine will divide the internal calibrator signal into the
data before doing either of these things. It is also possible to select a single switch from the input
data.
For skydip data, this routine calculates the sky temperature for each integration and sub-instrument.
IN = NDF (Read)
The name of the demodulated data file.
If SCUBA_PREFIX is set this can be the number of the observation rather than the full filename.
MSG_FILTER = CHAR (Read)
Message filter level. Allowed values are QUIET, NORM and
VERB. Default is NORM. There are no verbose messages.
OUT = NDF (Read)
The name
of the file to contain the output data.
SPIKE_LEVEL = INTEGER (Read)
Number of
spikes tolerated before marking data point bad. The default is that the sample should be
marked bad if the transputers detected more than 5 spikes during a 1 second sample.
SWITCH = INTEGER (Read)
Parameter to indicate which switch to extract. A value of 0
means that all switches should be reduced. Default is 0.
TARRAY = LOGICAL (Read)
Controls whether the T_COLD parameters are read as an array of values (true) or read
as a sequence of scalars (false) . This parameter is useful if the command is to be run in
batch mode. Default is false.
T_COLD = REAL (Read)
Temperature of the cold load
when processing skydip data. The default value is taken from the input file.
T_HOT =
REAL (Read)
Temperature of the hot load when processing skydip data. The default
value is taken from the input file.
USE_CALIBRATOR = LOGICAL (Read)
Yes, if you
want the data for each bolometer measurement divided by the corresponding internal
calibrator signal. The default is not to use the calibrator.
If the
input file is not found in the current directory, the directory specified by the DATADIR
environment variable is searched. This means that the raw data does not have to be in
the working directory. In addition IN accepts a number. This number is converted to a
demodulated data filename by prepending it with information specified in the SCUBA_PREFIX
environment variable. This filename expansion only works for demodulated data (ie data
containing ’_dem_’). The ’_dem_’ is assumed and should not be present in SCUBA_PREFIX.