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2021-04-01: Single Scattering Database version 1.1 released

We are pleased to announce that version 1.1.0 of the ARTS scattering database has been released. Database, technical report and readme document have been updated.

It is highly recommended to download both the new interface and database versions. They are found at the same places on Zenodo as v1.0: Database and Database Interfaces.

2020-10-15: ARTS 2.4.0 Release

Today we're happy to announce the release of ARTS 2.4. Since the last release in 2014, development has carried on and many new features and improvements have found its way into ARTS. Below you find a list of the most important changes.

Links to source code and documentation can be found on the Getting ARTS page.

Updated atmlab and arts-xml-data packages are available as well.

Thanks to all of you who have been using ARTS in the past years for their science. We're looking forward to your feedback and contributions.

Key features

  • New improved format for line-by-line data
  • Non-LTE (pure-rotational non-overlapping, and non-chemical cases)
  • Dedicated methods for heating rate calculations
  • Basic simulations of radars (both single and multiple scattering)
  • Radio link calculations not supported in this version
  • Interfaces to DISORT and RT4 scattering solvers
  • Jacobian for new quantities:
    • spectroscopic variables
    • particle properties (approximative)
  • OEM type inversions inside ARTS
  • TELSEM and TESSEM surface models
  • PyARTS: Python bindings for ARTS


  • Radiative transfer code (except MC) totally revised, including:
    • Higher consistency between modules
    • Higher calculation efficiency
    • Jacobian of atmospheric variables now fully analytical
  • Absorption/LBL revised
    • Support for new lineshapes
    • Performance improvements
  • New and extended system for defining particle size distributions
  • DOIT improvements
    • Optimized pressure grid
    • Convergence acceleration
    • Optional precalculated first-guess field
  • New sensor setup for passband-type, meteorological millimeter instruments (sensor_responseMetMM)

Known Issues

  • TestSpectroscopy fails on macOS

Stay healthy and enjoy,
The ARTS Developers

2020-09-07: Dr. Michael I. Mishchenko, 1959-2020

We mourn the loss of Michael Mishchenko, longterm chief editor of JQSRT, and author of light scattering textbooks. Over the years, he helped the development of ARTS and the community around it in many ways. As editor he defended the value of papers on model development at a time when this was not self-understood, and there were no other journals dedicated to the topic. As scientist and scattering expert he was always happy to share his wisdom and help us overcome practical obstacles and theoretical confusions. And as a person he was always open, friendly and supportive. Michael Mishchenko died on July 21. The official obituary page of NASA GISS is https://www.giss.nasa.gov/research/news/20200727/. We will miss him very much.

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