{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T11:16:12Z","timestamp":1774350972502,"version":"3.50.1"},"reference-count":26,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2023,4,25]],"date-time":"2023-04-25T00:00:00Z","timestamp":1682380800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","award":["22-12-00064"],"award-info":[{"award-number":["22-12-00064"]}],"id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Ground-based passive measurements of downwelling atmospheric radiation at ~110.836 GHz allow extracting the spectra of ozone self-radiation (rotational transition J = 61,5\u201360,6) coming from the low stratosphere\u2013mesosphere and retrieving vertical profiles of ozone concentration at these altitudes. There is a notable (several hundred kHz) ambiguity in the determination of the resonance frequency of this important ozone line. We carried out long-term ground-based measurements of atmospheric microwave radiation in this range using upgraded apparatus with high technical accuracy and spectral resolution (~12 kHz). The obtained brightness temperature spectra allowed us to determine the frequency of this ozone line to be 110,835.909 \u00b1 0.016 MHz. We verified that the Doppler frequency shift by horizontal wind as well as the variations of the tropospheric absorption had little effect on the obtained result. The found value was 131 \u00b1 16 kHz less than that measured in the laboratory and differed from modern model calculations. At the same time, it was close to the results of early semiempirical calculations made more than 40 years ago. The applications where precise knowledge about the resonance frequency of this ozone line can be important were discussed in this paper.<\/jats:p>","DOI":"10.3390\/rs15092259","type":"journal-article","created":{"date-parts":[[2023,4,25]],"date-time":"2023-04-25T02:06:35Z","timestamp":1682388395000},"page":"2259","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["High Precision Measurements of Resonance Frequency of Ozone Rotational Transition J = 61,5\u201360,6 in the Real Atmosphere"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8120-8588","authenticated-orcid":false,"given":"Mikhail Yu.","family":"Kulikov","sequence":"first","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"given":"Alexander A.","family":"Krasil\u2019nikov","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0514-740X","authenticated-orcid":false,"given":"Mikhail V.","family":"Belikovich","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"given":"Vitaly G.","family":"Ryskin","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3826-4402","authenticated-orcid":false,"given":"Alexander A.","family":"Shvetsov","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"given":"Natalya K.","family":"Skalyga","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"given":"Lev M.","family":"Kukin","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]},{"given":"Alexander M.","family":"Feigin","sequence":"additional","affiliation":[{"name":"A.V. Gaponov\u2013Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Str., 603950 Nizhny Novgorod, Russia"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6115","DOI":"10.1029\/JA081i034p06115","article-title":"Mesospheric ozone measured from ground-based millimeter wave observations","volume":"81","author":"Penfield","year":"1976","journal-title":"J. Geophys. Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"628","DOI":"10.1007\/s11141-014-9467-z","article-title":"Mobile spectroradiometric complex for middle atmosphere ozone soundings","volume":"56","author":"Kulikov","year":"2014","journal-title":"Radiophys. 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