4.1.1.0 atmosphere.initSpectralWindow

NRAO Home > CASA > CASA Toolkit Reference Manual

atmosphere.initSpectralWindow - Function

4.1.1 initialize spectral window

Description

function that defines a spectral window, computes absorption and emmision coefficients for this window, using the above atmospheric parameters.

Arguments


Inputs
nbands		number of spectral windows/bands. The value must be > 0.
		allowed:	int
		Default:	1
fCenter	GHz	center frequencies - Quantum with a vector value and unit of frequency, GHz
		allowed:	doubleGHz
		Default:	90
fWidth	GHz	frequency width of band - Quantum with a vector value and unit of frequency, GHz
		allowed:	doubleGHz
		Default:	0.64
fRes	GHz	resolution inside band - Quantum with a vector value and unit frequency, GHz. Default is for a single frequency.
		allowed:	doubleGHz
		Default:	0.0

Returns
int

Example

nb = 1
fC = qa.quantity(88., ’GHz’)
fW = qa.quantity(0.5, ’GHz’)
fR = qa.quantity(0.5, ’GHz’)
at.initSpectralWindow(nb, fC, fW, fR)

nb = 2
fC = qa.quantity([88., 90.], ’GHz’)
fW = qa.quantity([0.5, 0.5], ’GHz’)
fR = qa.quantity([0.125, 0.125], ’GHz’)
at.initSpectralWindow(nb, fC, fW, fR)

__________________________________________________________________

[next] [prev] [prev-tail] [front] [up]

More information about CASA may be found at the CASA web page

This code is available under the terms of the GNU General Public Lincense