#
AIPS HELP file for MTARS in 31DEC22

#### As of Tue May 30 18:37:38 2023

**MTARS**: Generate model inputs for TARS
### INPUTS

INTEXT
Text file with frequencies
FLUX Noise level to add
INLIST
List of sources up to 9999
OUTFILE
Output text file

### HELP SECTION

MTARS
Type: Task
Use: MTARS will take models of source flux, rotation measure, and
"RM thickness" and compute input files for TARS.
Adverbs:
INTEXT.....Text file containing a sample input file for TARS or
simply a list of frequencies (in Hz) one per line.
FLUX.......Noise level to be added.
OPTYPE.....
INLIST.....Text file containing one line per source, giving all 5 of
Q U Spix RM RMthick Type
blank separated free format. The 6th value, type has a
default of 1. Q, and U are those that would be
measured at 1 GHz wavelength. The resulting number of
components will be the number of lines in INLIST
neglecting comments (which start with # or ; in column 1)
and lines with format errors. Units are Jy/beam,
Jy/beam, unitless, radians/m^2, and radians/m^2. The
type are
The thickness is applied with a function specified by:
1. 'SLAB' - sin(x)/x with x = beta * lambda^2
2. 'GAUS' - exp(-f * x * x) with f = ln(2) / (1.8954)^2
3. 'EXP ' - exp(-f * abs(x)) with f = ln(2) / 1.8954
(Note 1.8954 radians is the point where sin(x)/x = 0.5
and beta is called RMthick below in radians/m/m)
OUTFILE....Output text file suitable for input to tars

### EXPLAIN SECTION