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freqselmanager.velocity - Function



Package synthesis
Module map
Tool freqselmanager


Create a freqsel data item representing velocity selection


Synopsis
velocity(frame, nchan, mstart, mstep)


Arguments

frame Reference frame
Allowed: String
Default: LSR
nchan No. of velocity channels
Allowed: Int
Default: 1
mstart Start velocity (e.g. '20km/s')
Allowed: Quantity
Default: '0km/s'
mstep Step velocity (e.g. '20km/s')
Allowed: Quantity
Default: '0km/s'


Returns
freqsel data item
or fail


Description

This function creates a freqsel data item representing selection by velocity.



Example
myfq:= freqselmanager();
item2 := myfq.velocity(nchan=1, mstart='10km/s', mstep='5km/s');

Create a freqsel data item item2 representing LSR velocity selection covering the range 10-15 km/s.








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