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HITRAN is a database of spectroscopic parameters regarding the effect of Earth atmosphere's molecules on the absorption and transmission of EMR. It is used in computer models for climate, etc. It was developed in the late 1960s with a number of updated editions including those from 1986, 1991, 1992, 1996, 1998, 2000, 2001, 2004, 2008, 2012, 2016, 2020, and 2024, these being the years that data was gathered for evaluation. The 2024 edition was released in January 2026, and efforts have begun for a future release to be labeled the 2026 edition. (Additional updates are now made to the online database between these year-editions.) HITEMP is an analogous database used for hotter atmospheres (e.g., of stars), specifically about spectral lines present at 1000 K and greater.