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Version 1.9 Build 1556

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imagerpositiontest.set_tolerance - Function

	Package	synthesis
	Module	synthesistester
	Tool	imagerpositiontest

Set the tolerance allowed for a position test to pass.

Synopsis
set_tolerance(tol)

Description
Set the tolerance allowed for a position test to pass. The tolerance is specified in mupliples of beam widths. The beam widths in RA and Dec are both determined, and in order for a test to pass a found component in the restored image must be <= tolerance*beam_ra in the RA direction and <= tolerance*beam_dec in the Dec direction from the same simulated component. STILL TO COME: Ultimately, a test which involves tolerance based on signal-to-noise should be allowed, such as the canonical position error = tolerance*0.5*beamwidth/(S/N).

Arguments

tol		The allowed tolerance in beam widths
		Allowed:	Float => 0
		Default:	1.0

Returns
T

Example

- include 'imagerpositiontest.g';
- ipt := imagerpositiontest();
# allow a lot of slop
- ipt.set_tolerance(5);
T
- ipt.set_deconvolution_function('mem');
- ipt.set_mem_parms(algorithm='entropy',niter=25,sigma='0.1Jy');
- ipt.dotests();