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The Velocity Potential/Stream Function Editor
This editor belongs to a type of editors known as family editors which allows related sets of input specifications to be grouped in the same icon editor. The main computation type can be set via the Application parameter which offers these options:
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To operate with this icon first you need to select which type of output you want to create (parameter Application) then the available parameters will change in the editor according to your selection.
Data
Specifies the data required for the application: it requires divergence for velocity potential and vorticity for stream function (both in spherical harmonics representation).
Truncation
Specifies the truncation to be applied to the spherical harmonics input data prior to transformation to gridpoint space.
Smoothing
Specifies whether to apply spatial smoothing to the spherical harmonics prior to transformation to grid points. This operation is performed after the truncation specified in Truncation . The smoothing filter is of the form :
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operator in grid point space.
Fltc
Specifies the value of the parameter fltc to be used in the smoothing filter. Only available if Smoothing is set to Yes. The default value is 19.4
Mfltexp
Specifies the value of the parameter mfltexp to be used in the smoothing filter. Only available if Smoothing is set to Yes. The default value is 2, roughly equivalent to applying the
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