>
> Sounds like it could be a gauss quadrature problem--given a continuous
> function and a fixed number of points: calculate the best
> approximation of the integral by choosing the location of the points
> where the value is calculated.
>
The integral is computed over the entire sphere if there is no symmetry
and if the measured data is computed in a circle in a plane with the main
response axis then the data has to be extrapolated to the sphere. Perhaps
there are folks out there who have worked on the DI intensively.
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