WIND SPEED -- create a vector for wind speed from u-v components

Name

WIND SPEED -- create a vector for wind speed from u-v components

Author

Kathy Pearson, MCNC, kathyp@mcnc.org, (919) 248-9240

Summary

	Name		WIND SPEED	
	Type		filter	
	Inputs		input field	(field 4D 2-vector uniform float)	
	Outputs		output field	(field 4D 3-vector uniform float)
	Parameters	(none)

Description

The WIND SPEED module accepts as input a 4D field of 2-vector u-v wind
components and outputs the same information in a field with an additional
vector specifying wind speed, r using the formula r = sqrt(u * u + v * v).
The output field labels are set to UWIND, VWIND, WIND SPEED, and the
units are all set to "m/s". 

Inputs

input_field		input field of u-v wind components 

Outputs

output field		output field of u-v wind components plus speed

Parameters

(none)

Example

Related modules

Limitations

This module is very limited.  It is written as a demo for the alpha
prototype data and its scope should be expanded for other types of
wind input from ROM, RADM, and UAM.

See also

(MCNC Visualization Plan)						11/93
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The MCNC Environmental Programs Group has created this module as part of a
suite of AVS demo modules, networks, and sample data sets to demonstrate 
the functionality of its visualization prototype for an Environmental 
Decision Support System (EDSS).  This system provides a unified method of 
analysis and visualization for data output from different environmental air 
quality models.  Remotely, standard output files from the following models 
can be read into AVS:
        ROM (Regional Oxidant Model)
        RADM (Regional Acid Deposition Model), low res and high res
        RADM (Regional Acid Depostion Model) Emissions, low res
        UAM (Urban Airshed Model, regulatory version)
        UAM (Urban Airshed Model, AREAL research version)
        UAM Wind (Urban Airshed Model, regulatory version)
        MCNC ALPHA-Prototype netCDF files
Alternatively, xdr portable binary AVS fields can be created from these
data types and accessed directly from the local workstation.
You can download these modules individually from the IAC using anonymous
ftp to the appropriate directories /avs_modules at avs.ncsc.org.  
If you would like to download the entire suite of modules, networks, and
sample datasets at the same time, the IAC recommends that you use 
anonymous ftp to grab the following file from avs.ncsc.org -
/sample_data/avs_data/MCNC_Env_Pgms/MCNC_Env_Pgms.tar.Z
This contains all source code to all local and remote modules, as well as
all of the sample datasets, networks, documentation, installation, and
usage notes.
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