4.1.1.0 atmosphere.getNonDispersivePathLength

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atmosphere.getNonDispersivePathLength - Function

4.1.1 get the integrated Atmospheric Non-Dispersive Path

Description

Get the integrated zenith H2O Atmospheric Path length (Non-Dispersive part) for the current conditions, for channel nc in spectral window spwid.

Arguments


Inputs
nc	Channel number (0-based; defaults to reference channel)
	allowed:	int
	Default:	-1
spwid	Int standing for spectral window id (0-based). The value must be >= 0.
	allowed:	int
	Default:	0

Returns
Quantity

Example

w = at.getUserWH2O()
nb = 1
fC = qa.quantity([850.0], ’GHz’)
fW = qa.quantity([0.5], ’GHz’)
nfR = qa.quantity([0.5], ’GHz’)
at.initSpectralWindow(nb, fC, fW, fR)
print "Total Dispersive Delay at ", fC[’value’][0], fC[’unit’], " for 1.0 air mass: ",\
      at.getDispersivePathLength()[’value’][0] /  w[’value’][0], " meters per mm of water vapor"
print "(",100*(at.getDispersivePathLength()[’value’][0] /  w[’value’][0])/(at.getNonDispersivePathLength()[’value’][0] / w[’value’][0]),\
      "% of the Non-dispersive one )"

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