HITRAN is an acronym for high-resolution transmission molecular absorption database. HITRAN is a compilation of spectroscopic parameters that a variety of computer codes use to predict and simulate the transmission and emission of light in the atmosphere. HITRAN data is predominantly used in atmospheric science and astrophysics, but it has many applications throughout science, industry, and technology.

The HITRAN project is directed from the Center for Astrophysics | Harvard & Smithsonian.

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News

Jan 2026 |
📢 HITRAN2024 is now live! 🚨

The new edition of the HITRAN database is now officially available on our server. The HITRAN2020paper describing the new edition is available in Open Access

I.E. Gordon, L.S. Rothman, R.J. Hargreaves, F.M. Gomez, T. Bertin, C. Hill, R.V. Kochanov, Y. Tan, P. Wcisło, V.Yu. Makhnev, P.F. Bernath, M. Birk, V. Boudon, A. Campargue, A. Coustenis, B.J. Drouin, R.R. Gamache, J.T. Hodges, D. Jacquemart, E.J. Mlawer, A.V. Nikitin, V.I. Perevalov, M. Rotger, S. Robert, J. Tennyson, G.C. Toon, H. Tran, V.G. Tyuterev, E.M. Adkins, A. Barbe, D.M. Bailey, K. Bielska, L. Bizzocchi, T.A. Blake, C.A. Bowesman, P. Cacciani, P. Čermák, A.G. Császár, L. Denis, S.C. Egbert, O. Egorov, A.Yu. Ermilov, A.J. Fleisher, H. Fleurbaey, A. Foltynowicz, T. Furtenbacher, M. Germann, E.R. Guest, J.J. Harrison, J.-M. Hartmann, A. Hjältén, S.-M. Hu, X. Huang, T.J. Johnson, H. Jóźwiak, S. Kassi, M.V. Khan, F. Kwabia-Tchana, T.J. Lee†, D. Lisak, A.-W. Liu, O.M. Lyulin, N.A. Malarich, L. Manceron, A.A. Marinina, S.T. Massie, J. Mascio, E.S. Medvedev, V.V. Meshkov, G.Ch. Mellau, M. Melosso, S.N. Mikhailenko, D. Mondelain, H.S.P. Müller, M. O'Donnell, A. Owens, A. Perrin, O.L. Polyansky, P.L. Raston, Z.D. Reed, M. Rey, C. Richard, G.B. Rieker, C. Röske, S.W. Sharpe, E. Starikova, N. Stolarczyk, A.V. Stolyarov, K. Sung, F. Tamassia, J. Terragni, V.G. Ushakov, S. Vasilchenko, B. Vispoel, K.L. Vodopyanov, G. Wagner, S. Wójtewicz, S.N. Yurchenko, N.F. Zobov, The HITRAN2024 molecular spectroscopic database. J. Quant. Spectrosc. Radiat. Transf. 109807 (2026).
doi:10.1016/j.jqsrt.2026.109807.]

==> Note that we are constantly making ongoing improvements and additions to many molecular bands. Updates, improvements, and corrections to the edition are posted in the "Database Updates" panel located on the home page of the HITRAN website. When citing the database, it is recommended to indicate whether an updated version of the HITRAN2024 edition was used.

Please e-mail us (info@hitran.org) a summary of any serious problems you encounter (or successes or suggestions).

Jan 2026 |
40000 users milestone

We are pleased to announce there are now over 40000 registered users of www.hitran.org

Dec 2025 |
First circular for the ASA-HITRAN meeting (Aug 26-28, 2026) is now available

The ASA - HITRAN 2026 will be held in Reims, France, from 26 – 28 August 2026. The first circular is available here.

Jul 2015 |
All inquiries can be made to HITRAN's support team at info@hitran.org

The HITRAN support e-mail has been established and our team is ready for questions.

Database Updates

Jan 2026 |
📰 The updates to the HITRAN2024 edition will be announced in this section as they appear

The data on this website corresponds to the HITRAN2024 edition. The updates to this edition will be announced in this section as they appear