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NRAO Home > CASA > CASA Toolkit Reference Manual |
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atmosphere.getDispersiveWetPhaseDelay - Function
4.1.1 get the integrated dispersive wet Atmospheric Phase Delay
Description
Function to retrieve the integrated wet Atmospheric Phase Delay (Dispersive
part) along the atmospheric path corresponding to the 1st guess water column.
Arguments
Inputs |
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nc |
| Channel number (0-based; defaults to reference channel)
| |
| allowed: | int | |
| Default: | -1 |
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spwid |
| Int standing for spectral window id (0-based). The value
must be >= 0.
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| allowed: | int |
|
| Default: | 0 |
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Quantity
Example
w = at.getUserWH2O()
numSpw = at.getNumSpectralWindows()
for spwid in range(numSpw):
numCh = at.getNumChan(spwid)
print "Spectral window ", spwid, " has ", numCh, " frequency channels"
for n in range(numCh):
freq = at.getChanFreq(n, spwid)
print "Total Dispersive Wet Phase Delay at ", freq[’value’][0], freq[’unit’], " for 1.0 air mass: ",\
(at.getDispersiveWetPhaseDelay(n, spwid)[’value’][0])/(w[’value’][0]), " degrees per mm of water vapor (",\
((100*at.getDispersiveWetPhaseDelay(n, spwid)[’value’][0])/(w[’value’][0]))/(at.getNonDispersiveWetPhaseDelay(n,spwid)[’value’][0]/w[’value’][0]),\
"% of the Non-dispersive one )"
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Copyright © 2016 Associated Universities Inc., Washington, D.C.
This code is available under the terms of the GNU General Public Lincense
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