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./toolbox
get_ap_eff.pro

Last modification date:
Wed Sep 28 13:27:11 2016

get_ap_eff

function get_ap_eff(freq[, elev])

Function to return a default aperture efficiency, given an observing frequency. Used in the calibration routines. The formula comes from the Ruze equation, using a surface accuracy of 390 microns. Currently the aperture efficiency returned is independent of elevation. For observations at low elevations it is especially important for the observer to bypass the default value returned by this routine.

Returns
the aperture efficiency
Examples 
    apeff = get_ap_eff(18.5)
    print,apeff
Version
$Id$

Parameters
freq
in, required
float 		Observing frequency in GHz
elev
in, optional
float 		Observing elevation in degrees; currently not used.

Produced by IDLdoc 1.6 on Wed Sep 28 13:27:39 2016