far field in the acoustic module and Matlab

hi,
I try to analize results of the given model:
"Acoustic Scattering off an Ellipsoid"
using matlab.

I connected the matlab using livelink and took the far field pressure using the command:
data = mpheval(model_load,'acpr.ffc1.pfar');

but I get big data structure:
size(data.d1)
ans =
5 23813

how can I know which value fit which angle?
and how can I compute the pressure for different distances?

Thanks,