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For the reference pair of protons. We have now also the reference sigma σRef.
Use the formula
rij = rRef * (σRef/σij)^(1/6). [Eq. 1] Vogeli 2014, eqEq. 63b
to calculate the other distances between other atoms (in a separate column).
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This step makes the crossrelaxation rates σiσi,j in correct mutual proportion. The actual values can be still inaccurate due to inaccurate reference distance, rRef in Eq. 1, or rather σRef being not correctly proportional to the rRef due to spin diffusion or other effects.
Task 2: Redo the normalization
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