Depth with point source correction

This is the laying depth of the object adjusted by the point source correction. >

According to the book 'Kabel und Leitungen für Starkstrom' by L. Heinhold, 5th edition 1999 (in German), one can imagine that the temperature field is built up by a line source which runs parallel to the cable axis at a distance d_psc (eccentricity of the cable). The depth of this line source is $L_{psc}$, the isotherms are eccentric to this line source with a distance $e_{iso}$.

Symbol
$L_{psc}$
Unit
m
Formulae
$\sqrt{- D_{o}^{2} + L_{cm}^{2}}$
Related
$D_{o}$
$L_{cm}$
Used in
$D_{dry}$
$L_{dry}$