  Many applications in Solar physics need a 1D atmospheric model as initial
condition or as reference for inversions of observational data. The VAL
atmospheric models are based on observations and are widely used since decades.
Complementary to that, the FAL models implement radiative hydrodynamics and
showed the shortcomings of the VAL models since almost equally long time. In
this work, we present a new 1D layered atmosphere that spans not only from the
photosphere to the transition region, but from the solar interior up to far in
the corona. We also discuss typical mistakes that are done when switching on
simulations based on such an initial condition and show how the initial
condition can be equilibrated so that a simulation can start smoothly. The 1D
atmosphere we present here served well as initial condition for HD and MHD
simulations and should also be considered as reference data for solving inverse
problems.
