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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">izmertech-1472</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ИЗМЕРЕНИЯ ВРЕМЕНИ И ЧАСТОТЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TIME AND FREQUENCY MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Физическая модельсистематического изменения частоты выходного сигнала водородных стандартов частоты и времени</article-title><trans-title-group xml:lang="en"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Васильев</surname><given-names>В. И.</given-names></name></name-alternatives><email xlink:type="simple">kvarz_asu@kvarz.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Нижегородский научно-исследовательский приборостроительный институт «Кварц» им. А.П. Горшков»</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>15</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>2</issue><fpage>37</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1472">https://www.izmt.ru/jour/article/view/1472</self-uri><abstract><p>Рассмотрена физическая модель систематического изменения частоты выходного сигнала водородного стандарта частоты и времени. Дано сравнение результатовтеоретического исследования и многолетних измерений дрейфа частоты стандартов. Доказано, что дрейф может изменять свой знак. Мониторинг параметров водородного генераторапозволяет прогнозировать поведение его частоты.</p></abstract><trans-abstract xml:lang="en"><p>The physical model of hydrogen maser systematic frequency drift is discussed. Results of theoretical research are compared with results of experiments and long-term practical observations over drift of a hydrogen maser. One of conclusions of research is the statement that drift can change the value and a sign. The model allows to predict behavior of maser frequency with the help of maser parameters monitoring.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>водородный стандарт частоты и времени</kwd><kwd>дрейф частоты сигнала</kwd><kwd>время релаксации</kwd><kwd>автоматическаянастройка частоты резонатора</kwd><kwd>добротность спектральной линии</kwd><kwd>hydrogen maser</kwd><kwd>frequency drift</kwd><kwd>relaxation time</kwd><kwd>cavity auto tuning</kwd><kwd>quality factor of the spectral line</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Logachev V.A., Pashev G.P. Estimation of linear frequency drift coefficient of frequency standards// Proc. IEEEIntern. FrequencyControlSymp.Honolulu(USA), 1996.P.960-963.</mixed-citation><mixed-citation xml:lang="en">Logachev V.A., Pashev G.P. Estimation of linear frequency drift coefficient of frequency standards// Proc. IEEEIntern. 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