ARTS is a radiative transfer model for the millimeter and sub-millimeter spectral range. There are a number of models mostly developed explicitly for the different sensors. The basic principle for the development of ARTS is to provide a code that can be applied for many different applications concerning radiative transfer calculations in the microwave region. For this reason much emphasis has been placed on modularity, extendibility, and generality.

The features of the current version are listed in the ARTS Documentation.

ARTS is a community effort. The core development is done by Universit├Ąt Hamburg and Chalmers University.