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[AWIPS #OIH-774959]: Accessing AWIPS equations via python-awips?

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  • Subject: [AWIPS #OIH-774959]: Accessing AWIPS equations via python-awips?
  • Date: Thu, 26 May 2016 13:55:51 -0600
> Could I call, for instance, the SBCAPE method from AWIPS via python-awips?
> Is that accessible?

Derived parameters are not yet supported in python-awips, but I have a lead on 
how they can be.

> Is it possible to access the equations that AWIPS uses to calculate things
> like Precipitable Water, CAPEs, CINH, 0-3km SRH, and other indices that
> show up in the multiple different panes around the soundings when using SPC
> wide view?

Derived parameters are located at 
https://github.com/Unidata/awips2/tree/unidata_16.1.4/edexOsgi/com.raytheon.uf.common.dataplugin.grid/utility/common_static/base/derivedParameters/definitions

Computed CAPE (cCape), for example, 
https://github.com/Unidata/awips2/tree/unidata_16.1.4/edexOsgi/com.raytheon.uf.common.dataplugin.grid/utility/common_static/base/derivedParameters/definitions/cCape.xml

has a number of methods defined such as 

    <Method  name="Cape" levels="S">
        <Field abbreviation="T" level="3D" />
        <Field abbreviation="P"/>
        <Field abbreviation="PoT"/>
        <Field abbreviation="SHx"/>
        <ConstantField value="0.0"/>
    </Method>

The method name ("Cape") is a reference to a file located in 
https://github.com/Unidata/awips2-core/tree/unidata_16.1.4/common/com.raytheon.uf.common.derivparam.python/utility/common_static/base/derivedParameters/functions

In this example, Cape.py calculates the derived parm given the input fields (T, 
P, PoT, SHx)  
https://github.com/Unidata/awips2-core/blob/unidata_16.1.4/common/com.raytheon.uf.common.derivparam.python/utility/common_static/base/derivedParameters/functions/Cape.py

PoT and SHx from above are also a derived parms:
https://github.com/Unidata/awips2-core/blob/unidata_16.1.4/common/com.raytheon.uf.common.derivparam.python/utility/common_static/base/derivedParameters/functions/PoT.py
https://github.com/Unidata/awips2-core/blob/unidata_16.1.4/common/com.raytheon.uf.common.derivparam.python/utility/common_static/base/derivedParameters/functions/SHx.py


-Michael

Ticket Details
===================
Ticket ID: OIH-774959
Department: Support AWIPS
Priority: Normal
Status: Open
===================
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