The continuum in ATM 2009 is divided into two components

**The dry component,**- which comes from collision induced absorption due to transient eletric dipole moments generated in binary interactions of symmetric molecules with eletric quadrupole moments such as N and , and the relaxation of the absorption.
**The wet component,**- which is indeed a pseudo-continuum. It is a modeling of the long-range linewidth of the water lines, whose true shape is not known accurately enough beyond a few times the halfwidth from the line centers.

Gildas manager 2014-07-01