# Usage of computeExpectedFWHM

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Uses scipy.signal to perform the convolution of one (or two) top-hat functions with a Gaussian, and reports the FWHM of the result.
See also

primaryBeamArcsec to compute the ALMA primary beam for a specific observation, or at a specific frequency,
and

gjincBeam to compute the restoring beam appropriate for a total power image produced by

sdimaging. The inverse of this function is

deconvolveDiskFromBeam.

### Usage:

au.computeExpectedFWHM(beam_fwhm, disk_diameter_arcsec, disk_diameter_arcsec2=None)

### Example:

CASA <3>: au.computeExpectedFWHM(10.0, 3.0)
Out[3]: 10.209726

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ToddHunter - 2012-04-09