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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

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 observe to determine which spectral window is used.

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