Description:
This routine takes raw
demodulated noise data and processes it. NDF and ASCII results files are generated.
The output NDF file is a 2-D dataset with a chop signal and calibrator signal per bolometer. The text
file is similar to the file generated by the real-time system.
Parameters:
IN = NDF (Read)
The name
of the raw noise data file. A single number can be supplied if SCUBA_PREFIX is set. DATADIR is
recognised.
OUT = NDF (Write)
Output NDF. This file is 2-dimensional. The first dimension
is bolometer number. The second dimension is chop signal and calibrator signal (along
with variances and quality). If no output NDF is required a null value can be given.
FILE = FILENAME (Write)
Output text file. Format is almost identical to that generated
by the real-time system. A null value can be supplied to prevent a text file from being
written. The default output name is the same name as generated by the on-line system
(noise_YYMMDD_nr.dat)
MSG_FILTER = CHAR (Read)
Message output level. Default is
NORM. Allowed values are QUIET, NORMAL and VERBOSE.
Examples:
reduce_noise
19981113_dem_0001 out_noise !
Read in observation 1 and write the output to an NDF names
out_noise.sdf. Do not write a text file. reduce_noise ’3’ ! accept
Process observation 3 but do
not write an NDF output file. Use the default file name for the text file. Notes:
Noise
observations containing multiple measurements are condensed into a single measurement.
Copyright © 1997-2000,2003 Particle Physics and Astronomy Research Council