SURF_WRITE_DATA - Write bolometer positions and values to text file

Description:

This routine writes the value, variance and position of each data point to a ASCII file. It is called as part of the EXTRACT_DATA task. The interface is the same as that used in the REBIN task. The data and variance are in volts. The positions are in radians. The data are written out as columns (RA DEC DATA VAR) and subsets can be extracted by using SCUBA sections.

Invocation:

CALL SURF_WRITE_DATA( FD, NPTS, IN_DATA, IN_VARIANCE, BOL_RA, BOL_DEC, STATUS )

Arguments:

FD = INTEGER (Given)

Output file descriptor

NPTS = INTEGER (Given)

Number of points in input data

IN_DATA( NPTS ) = REAL (Given)

Data value

IN_VARIANCE( NPTS ) = REAL (Given)

Variance on data

BOL_RA( NPTS ) = DOUBLE (Given)

Bolometer position (radians offset from map centre)

BOL_DEC( NPTS ) = DOUBLE (Given)

Bolometer position (radians offset from map centre)

STATUS = INTEGER (Given and Returned)

The global status

Notes:

For each file name that is entered, values for the parameters SELECT_INTS, WEIGHT, SHIFT_DX and SHIFT_DY are requested.

• The application can read in up to 100 separate input datasets.

• No data is returned if the DATA or positions are bad. Data is still returned if Variance is bad.

ASCII input files

The REF and IN parameters accept ASCII text files as input. These text files may contain comments (signified by a #), NDF names, values for the parameters WEIGHT, SHIFT_DX and SHIFT_DY, and names of other ASCII files. There is one data file per line. An example file is:

file1{b5}	1.0	0.5	0.0	# Read bolometer 5 from file1.sdf
file2				# Read file 2 but you will still be
				# prompted for WEIGHT, and shifts.
file3{i3}-	1.0	0.0	0.0	# Use everything except int 3
test.bat				# Read in another text file

Note that the parameters are position dependent and are not necessary. Missing parameters are requested. This means it is not possible to specify SHIFT_DX (position 3) without specifying the WEIGHT. Also note that SCUBA sections can be specified with any input NDF.

Related Applications

SURF: REBIN, BOLREBIN, INTREBIN, CHANGE_QUALITY

Copyright

Copyright ©1995,1996,1997,1998,1999 Particle Physics and Astronomy Research Council. All Rights Reserved.