123 lines
3.5 KiB
Python
123 lines
3.5 KiB
Python
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##
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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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# ----------------------------------------------------------------------------
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# This software is in the public domain, furnished "as is", without technical
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# support, and with no warranty, express or implied, as to its usefulness for
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# any purpose.
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#
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# Numeric_SnowAmt_SmartTool
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#
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# Author: billingsley
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# ----------------------------------------------------------------------------
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##
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# This is an absolute override file, indicating that a higher priority version
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# of the file will completely replace a lower priority version of the file.
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##
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ToolType = "numeric"
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WeatherElementEdited = "SnowAmt"
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from numpy import *
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# Set up Class
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import SmartScript
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## For available commands, see SmartScript
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class Tool (SmartScript.SmartScript):
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def __init__(self, dbss):
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SmartScript.SmartScript.__init__(self, dbss)
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def execute(self, Topo, T, FzLevel, QPF):
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"Determines SnowAmt from QPF, T, FzLevel and Topo information"
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## if T < 9: # This way 8.5 will be treated as 8
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## SnowRatio = 20
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## elif T >= 30:
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## SnowRatio = 7
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## else:
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## SnowRatio = SnowRatioDict[int(T)]
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SnowRatio = self.linear(9,29,18,8,T).astype(float32)
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SnowRatio[less(T, 9)] = 20
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SnowRatio[greater_equal(T, 30)] = 7
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## # Determine new value
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## if (FzLevel-1000) <= Topo:
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## SnowAmt = SnowRatio * QPF
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## else:
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## SnowAmt = 0
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SnowAmt = self.empty()
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fzLevelMask = less_equal(FzLevel-1000, Topo)
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SnowAmt[fzLevelMask] = SnowRatio[fzLevelMask] * QPF[fzLevelMask]
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# Return the new value
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return SnowAmt
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def linear(self, xmin, xmax, ymin, ymax, we):
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m = (ymax - ymin) / (xmax - xmin + .0000001)
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b = ymin - m * xmin
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return m * we + b
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## POINT-BASED VERSION
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# This dictionary maps temperature to snow ratio.
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# The boundaries are handled in the code below.
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##SnowRatioDict = {
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## 9:18,
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## 10:18,
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## 11:17,
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## 12:17,
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## 13:16,
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## 14:15,
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## 15:14,
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## 16:13,
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## 17:13,
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## 18:12,
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## 19:12,
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## 20:11,
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## 21:11,
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## 22:11,
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## 23:10,
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## 24:10,
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## 25:9,
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## 26:9,
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## 27:8,
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## 28:8,
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## 29:8
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## }
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######################
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##def SnowAmt_SmartTool(QPF, T, FzLevel, Topo):
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## "Determines SnowAmt from QPF, T, FzLevel and Topo information"
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## if T < 9: # This way 8.5 will be treated as 8
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## SnowRatio = 20
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## elif T >= 30:
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## SnowRatio = 7
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## else:
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## SnowRatio = SnowRatioDict[int(T)]
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## # Determine new value
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## if (FzLevel-1000) <= Topo:
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## SnowAmt = SnowRatio * QPF
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## else:
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## SnowAmt = 0
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## # Return the new value
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## return SnowAmt
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