12 
capacity are referred to Part~\ref{part2} of this manual. 
capacity are referred to Part~\ref{part2} of this manual. 
13 
It is beyond the intention of this manual to give a detailed introduction to 
It is beyond the intention of this manual to give a detailed introduction to 
14 
geophysical inversion, in particular to the appropriate preprocessing of data 
geophysical inversion, in particular to the appropriate preprocessing of data 
15 
sets. We refer to~\cite{REF1, REF2, REF3}. 
sets. 
16 


17 
The \downunder module described here is designed to calculate estimations for 
The \downunder module described here is designed to calculate estimations for 
18 
the 3D distribution of density and/or susceptibility from 2D gravity and 
the 3D distribution of density and/or susceptibility from 2D gravity and 