ИСТИНА

The HITRAN2020 database is scheduled to be released at the end of this year. It is a titanic effort of experimentalists, theoreticians and atmospheric scientists, who measure, calculate and validate the HITRAN data. The lists for almost all of the 49 HITRAN molecules in the line-by-line section (and several additional ones have been added) were updated in comparison with the previous compilation HITRAN2016 (Gordon et al., 2017). The extent of the updates ranges from updating a few lines of certain molecules to complete replacements of the lists and introduction of additional isotopologues. Many new vibrational bands were added to the database, extending the spectral coverage and completeness of the datasets. In addition, the accuracy of the parameters for major atmospheric absorbers has been increased substantially, often featuring sub-percent uncertainties. Some of the highlights include: enhanced consistency between the intensities of the ozone bands in the MW, IR, and UV; improved quality of the water vapor line list and extension into the UV, updates to the spectral parameters of methane, etc. The number of parameters was also increased significantly, now incorporating, for instance, non-Voigt line profiles for many gases; broadening by water vapor (Tan et al., 2019); update of collision-induced absorption sets (Karman et al., 2019), etc. The HITRAN2020 edition will continue taking advantage of the new structure and interface available at www.hitran.org (Hill et al., 2016) and the HITRAN Application Programming Interface (Kochanov et al., 2016). The functionality of both tools has been extended for the new edition. This talk will provide a summary of the updates, emphasizing details of some of the most important improvements with relevance to the remote sensing of the terrestrial atmosphere. This work is supported by the NASA PDART and AURA programs.