[gmx-users] MSD normalization

[Sławomir Stachura]

Hi,

I was just wondering how MSDs in Gromacs are normalized. I am calculatiing MSDs for my lipid system of different timesteps of simulation and I get much higher results for centre of mass calculations in comparison to mass-weighted one.  And I thought about normalization issue, but I couldn't find any informations concerning that topic in manual.
I'd be grateful if someone could explain how mean square displacement is normalized.

Cheers,  
   Slawomir