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HITRAN online
HITRANonline provides access to the HITRAN database, including molecular line-by-line parameters, cross-section data, and documentation.
About HITRAN online
HITRANonline is the web interface to the HITRAN database, which stands for high-resolution transmission molecular absorption database. It is a compilation of spectroscopic parameters used by computer codes to predict and simulate the transmission and emission of light in the atmosphere.
Through the site, users can access line-by-line molecular data, absorption cross sections, collision-induced absorption, water vapor continuum data, aerosol properties, HITEMP, and supplemental files. The site also provides documentation on molecules, isotopologues, parameters, uncertainties and quantum notation, along with FAQs, video tutorials, and citation guidance.
The resource suits researchers and technical users in atmospheric science and astrophysics, as well as others in science, industry, and technology who work with molecular absorption and atmospheric transmission data. The project is directed from the Center for Astrophysics | Harvard & Smithsonian.
Key features
- Access line-by-line molecular spectroscopic parameters
- Access absorption cross-section data
- Access collision-induced absorption data
- Access water vapor continuum and aerosol data
- Browse documentation, FAQs, and video tutorials
- Access HITEMP and supplemental data files
Best for: Researchers and technical users in atmospheric science and astrophysics working with light transmission data.
Good for
- Covers multiple related data types in one place
- Includes documentation and tutorials for parameters
- Maintained by research institution with NASA support
HITRAN online at a glance
- Website
- hitran.org
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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HITRAN online FAQ
What is HITRANonline?
HITRANonline is the interface to the HITRAN database, a compilation of spectroscopic parameters used to predict and simulate transmission and emission of light in the atmosphere.
What types of data are available on HITRANonline?
Line-by-line data, absorption cross sections, collision-induced absorption, MT_CKD water vapor continuum, aerosol properties, HITEMP, and supplemental data.
Who maintains the HITRAN project?
The project is directed from the Center for Astrophysics | Harvard & Smithsonian and supported by NASA.
How should HITRAN data be cited?
The site provides a citation policy and recommends indicating whether an updated version of the HITRAN2024 edition was used.
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