question for angular search

[jinxsfe]

I dont know how to get 20A when calculate the rmax in tomogram, when I check the online data, the
voxel size for
these data is 1.0 um in icy and 1 Anstrom for imod, how we get 20A

[McHaillet]

First, you are right about the voxel size annotation for the tutorial files, it should totally be: 13.79 Angstrom! Sorry for the mistake there, I though I annotated them properly.

In the tutorial we apply a low pass filter at 40A resolution, which in fourier space is 1/40 $A^{-1}$. Hence the 7.00 degrees sampling. If we would have not applied a low pass filter, the nyquist resolution of the tomogram would be 1/ (2 * 13.79) $A^{-1}$, and the angular sampling would change!

[McHaillet]

I added a fix for the voxel size annotation in the tutorial.