2.4.1.0 simulator.setspwindow

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simulator.setspwindow - Function

2.4.1 Set one or more spectral windows

Description

Set one or more spectral windows for the observations, including starting frequency, number of channels, channel increment and resolution, and stokes parameters observed. Can be invoked multiple times for a complex observation. Must be invoked at least once before observe.

Arguments


Inputs
spwname	Unique user-supplied name for this spectral window
	allowed:	string
	Default:	XBAND ’XBAND’
freq	Starting frequency
	allowed:	any
	Default:	variant 8.0e9Hz
deltafreq	Frequency increment per channel
	allowed:	any
	Default:	variant 50e6Hz
freqresolution	Frequency resolution per channel
	allowed:	any
	Default:	variant 50.e6Hz
refcode	Spectral reference code e.g. LSRK, TOPO, BARY
	allowed:	string
	Default:	TOPO
nchannels	Number of channels
	allowed:	int
	Default:	1
stokes	Stokes types to simulate
	allowed:	string
	Default:	RR LL ’RR LL’

Returns
bool

Example

To simulate a two spectral window (or two IF’s in VLA jargon) data
set, use setpwid as follows (here we are simulating 16 channels, 50MHz
wide channel for each spectral window)

sm.setspwindow(spwname=’CBAND’, freq=’2GHz’, deltafreq=’50MHz’,
freqresolution=’50MHz’, nchannels=16, stokes=’RR LL’);

sm.setspwindow(spwname=’SBAND’, freq=’5GHz’, deltafreq=’50MHz’,
freqresolution=’50MHz’, nchannels=16, stokes=’RR LL’);

Note that the spwname is used in {\tt observe} to determine which spectral window
is used.

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