e2ecdcfe33
Former-commit-id:a02aeb236c[formerly9f19e3f712] [formerlya02aeb236c[formerly9f19e3f712] [formerly06a8b51d6d[formerly 64fa9254b946eae7e61bbc3f513b7c3696c4f54f]]] Former-commit-id:06a8b51d6dFormer-commit-id:8e80217e59[formerly3360eb6c5f] Former-commit-id:377dcd10b9
53 lines
1.4 KiB
Python
53 lines
1.4 KiB
Python
##
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# This software was developed and / or modified by Raytheon Company,
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# pursuant to Contract DG133W-05-CQ-1067 with the US Government.
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#
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# U.S. EXPORT CONTROLLED TECHNICAL DATA
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# This software product contains export-restricted data whose
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# export/transfer/disclosure is restricted by U.S. law. Dissemination
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# to non-U.S. persons whether in the United States or abroad requires
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# an export license or other authorization.
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#
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# Contractor Name: Raytheon Company
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# Contractor Address: 6825 Pine Street, Suite 340
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# Mail Stop B8
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# Omaha, NE 68106
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# 402.291.0100
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#
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# See the AWIPS II Master Rights File ("Master Rights File.pdf") for
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# further licensing information.
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##
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from numpy import exp
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def execute1(T, DpT):
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"Calculate Relative Humidity from Temperature and Dewpoint Temp."
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RH = T-DpT
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RH *= 0.0091379024
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RH += 6106.396/T
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RH -= 6106.396/DpT
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RH = exp(RH)
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RH *= 100
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return RH
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def execute2(P, T, SHx):
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"Calculate Relative Humidity from Pressure, Temp, and Spec Humidity."
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# Constants from the Fortran code.
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a = 22.05565
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b = 0.0091379024
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c = 6106.396
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epsilonx1k = 622.0
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shxDenom = SHx * 0.378
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shxDenom += epsilonx1k
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tDenom = -b*T
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tDenom += a
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tDenom -= c/T
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RH = P * SHx
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RH /= shxDenom
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RH /= exp(tDenom)
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return RH
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