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NRAO Home > CASA > CASA Toolkit Reference Manual |
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atmosphere.updateAtmProfile - Function
4.1.1 Update basic atmospheric parameters of atmosphere tool
Description
This is used to update the atmosphere tool when basic atmospheric
parameters.change.
Arguments
Inputs |
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altitude | m | Site altitude - Quantity with units of altitude, meter
| |
| allowed: | doublem | |
| Default: | 5000. |
|
temperature | K | Ambient ground temperature - Quantity with units of
temperature, K
| |
| allowed: | doubleK | |
| Default: | 270.0 |
|
pressure | mbar | Ambient ground pressure - Quantity with units of
pressure, mbar
| |
| allowed: | doublembar | |
| Default: | 560.0 |
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humidity |
| Relative humidy used to guess water (0-100)
| |
| allowed: | double |
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| Default: | 20.0 |
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dTem_dh | K/km | Tropospheric Lapse Rate - the derivative of temperature
with respect to height - Quantity with units of K/km
| |
| allowed: | doubleK/km |
|
| Default: | -5.6 |
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h0 | km | scale height for water( exp distribution ) - Quantity with
the dimension of length, and units of kilometer
| |
| allowed: | doublekm |
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| Default: | 2.0 |
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string
Example
new_tmp = qa.quantity(275.0, ’K’)
print at.updateAtmProfile(alt, new_tmp, pre, hum, wvl, h0)
# UPDATED BASIC ATMOSPHERIC PARAMETERS TO GENERATE REFERENCE ATMOSPHERIC PROFILE
#
# Ground temperature T: 275 K
# Ground pressure P: 560 mb
# Relative humidity rh: 20 %
# Scale height h0: 2 km
# Altitude alti: 5000 m
# Tropospheric lapse rate: -5.6 K/km
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