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.

News

Dates for the next HITRAN/ASA conference, June 13-15th, 2018

The 15th HITRAN/ASA conference will be held at the Harvard-Smithsonian Center for Astrophysics, Cambridge, MA. June 13-15th, 2018. The details can be found here.

7000 users milestone

There are now over 7000 users registered on www.hitran.org

The HITRAN2016 edition is now available 🎺

Dear Colleagues,

The data on this website corresponds to the recently released HITRAN2016 edition of the database. The HITRAN2016 paper describing the new edition is available in Open Access

I.E. Gordon, L.S. Rothman, C. Hill, R.V. Kochanov, Y. Tan, P.F. Bernath, M. Birk, V. Boudon, A. Campargue, K.V. Chance, B.J. Drouin, J.-M. Flaud, R.R. Gamache, J.T. Hodges, D. Jacquemart, V.I. Perevalov, A. Perrin, K.P. Shine, M.-A.H. Smith, J. Tennyson, G.C. Toon, H. Tran, V.G. Tyuterev, A. Barbe, A.G. Császár, V.M. Devi, T. Furtenbacher, J.J. Harrison, J.-M. Hartmann, A. Jolly, T.J. Johnson, T. Karman, I. Kleiner, A.A. Kyuberis, J. Loos, O.M. Lyulin, S.T. Massie, S.N. Mikhailenko, N. Moazzen-Ahmadi, H.S.P. Müller, O.V. Naumenko, A.V. Nikitin, O.L. Polyansky, M. Rey, M. Rotger, S.W. Sharpe, K. Sung, E. Starikova, S.A. Tashkun, J. Vander Auwera, G. Wagner, J. Wilzewski, P. Wcisło, S. Yu, E.J. Zak, The HITRAN2016 Molecular Spectroscopic Database, J. Quant. Spectrosc. Radiat. Transf. (2017) 203, 3-69.
doi:10.1016/j.jqsrt.2017.06.038.]

==> Note that we are still making ongoing improvements 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 web-site. When citing the database it is recommended to indicate if an updated version of the HITRAN2016 edition was used.

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

Postdoctoral opportunity in the HITRAN group

The HITRAN group (www.hitran.org , Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA) is looking for Postdoctoral associate. Postdoc will be involved in work on the HITRAN and HITEMP compilations. The responsibilities will include construction of the spectral line lists for the molecular species relevant to the modeling of planetary atmospheres. This will include, but is not limited to, collecting available experimental and theoretical data, assessing their quality and creating semi-empirical models for calculating parameters that are not available in the literature. In addition to being co-authors on the widely cited HITRAN and HITEMP papers, the candidates will have an opportunity to work on first-author publications in the field of atmospheric and/or astronomical spectroscopy. Some examples of the publications are given below this ad.

The candidates are expected to have a working experience in the field of molecular spectroscopy (understanding of different types of molecular symmetries, transitions, selection rules, working with Hamiltonians, etc). Experience with FORTRAN and/or Python is required. Proficiency in the English language and good communication skills are required. Candidates will have to be able to work both independently and within a team. Applicants are expected to have completed their PhDs no earlier than July 2011 and be able to start their duties no later than September 1, 2017. In addition, the candidates should have experience in at least three out of the five areas listed below

1. First hand experience with the HITRAN and/or HITEMP databases.

2. Working knowledge of line-shape parametrizations (including the Hartman-Tran profile) and their implementations. Experience with line mixing is a plus.

3. Experience with commonly used spectroscopic programs for fitting and predicting spectra. For instance, LEVEL, SPFIT, PGOPHER, etc.

4. Experience in Structured Query Language (SQL). In addition, experience with Django and Apache is a big plus.

5. Proficiency in writing scientific papers, manuals and other types of documentation.

The position is for one year and provides a stipend of about $60,000 per annum. Depending on the performance and the availability of funding, the position may be extended to another year. Medical insurance can be covered.

Applications (with CVs) should be sent to Dr. Iouli E. Gordon (igordon@cfa.harvard.edu). Three reference letters should be sent independently by scientists providing recommendations.

Some relevant publications:

C. Hill, I.E. Gordon, R. V. Kochanov, L. Barrett, J.S. Wilzewski, L.S. Rothman, HITRANonline: An online interface and the flexible representation of spectroscopic data in the HITRAN database, J. Quant. Spectrosc. Radiat. Transf. 177 (2016) 4–14. doi:10.1016/j.jqsrt.2015.12.012.

R.V. Kochanov, I.E. Gordon, L.S. Rothman, P. Wcisło, C. Hill, J.S. Wilzewski, HITRAN Application Programming Interface (HAPI): A comprehensive approach to working with spectroscopic data, J. Quant. Spectrosc. Radiat. Transf. 177 (2016) 15–30. doi:10.1016/j.jqsrt.2016.03.005.

P. Wcisło, I.E. Gordon, H. Tran, Y. Tan, S.-M. Hu, A. Campargue, S. Kassi, D. Romanini, C. Hill, R.V. Kochanov, L.S. Rothman, The implementation of non-Voigt line profiles in the HITRAN database: H2 case study, J. Quant. Spectrosc. Radiat. Transf. 177 (2016) 75–91. doi:10.1016/j.jqsrt.2016.01.024.

J.S. Wilzewski, I.E. Gordon, R. V. Kochanov, C. Hill, L.S. Rothman, H2, He, and CO2 line-broadening coefficients, pressure shifts and temperature-dependence exponents for the HITRAN database. Part 1: SO2, NH3, HF, HCl, OCS and C2H2, J. Quant. Spectrosc. Radiat. Transf. 168 (2016) 193–206. doi:10.1016/j.jqsrt.2015.09.003.

G. Li, I.E. Gordon, L.S. Rothman, Y. Tan, S.-M. Hu, S. Kassi, A. Campargue, E.S. Medvedev, Rovibrational Line Lists for Nine Isotopologues of the CO Molecule in the X1Σ+ Ground Electronic State, Astrophys. J. Suppl. Ser. 216 (2015) 15. doi:10.1088/0067-0049/216/1/15.

G. Li, I.E. Gordon, P.F. Bernath, L.. Rothman, Direct fit of experimental ro-vibrational intensities to the dipole moment function: Application to HCl, J. Quant. Spectrosc. Radiat. Transf. 112 (2011) 1543–1550. doi:10.1016/j.jqsrt.2011.03.014.

I.E. Gordon, L.S. Rothman, G.C. Toon, Revision of spectral parameters for the B- and γ-bands of oxygen and their validation against atmospheric spectra, J. Quant. Spectrosc. Radiat. Transf. 112 (2011) 2310–2322. doi:10.1016/j.jqsrt.2011.05.007.

L.S. Rothman, I.E. Gordon, Y. Babikov, A. Barbe, D. Chris Benner, et al., The HITRAN2012 molecular spectroscopic database, J. Quant. Spectrosc. Radiat. Transf. 130 (2013) 4–50. doi:10.1016/j.jqsrt.2013.07.002.

L.S. Rothman, I.E. Gordon, R.J. Barber, H. Dothe, R.R. Gamache, A. Goldman, V.I. Perevalov, S. A. Tashkun, J. Tennyson, HITEMP, the high-temperature molecular spectroscopic database, J. Quant. Spectrosc. Radiat. Transf. 111 (2010) 2139–2150. doi:10.1016/j.jqsrt.2010.05.001.

Articles describing HITRANonline, HAPI, and new line-shape representations

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

Minor corrections to the CO2 line list

It was found that due to a programming error 19 lines (with P1e assignment) of some bands of asymmetric isotopologues of carbon dioxide had air-broadened half-width values of zero in the official release of HITRAN2016. This has been fixed now and all of these lines have appropriate values for this parameter.

In addition the pure rotational transitions of the 16O12C17O isotopologue were missing upper-state quantum numbers associated with the hyperfine splitting. This in turn caused erroneous calculation of the upper-state statistical weight and the Einstein-A coefficients. All of these weak lines have been fixed now.

Once again we would like to remind users that the 11th and 12th isotopologues of carbon dioxide are labeled as A and B respectively if one asks for the output in the ".par" format. This should be taken into account in radiative transfer codes.