izmertechИзмерительная техникаIzmeritel`naya Tekhnika0368-10252949-5237ФГУП "ВНИИФТРИ"izmertech-525Research ArticleФУНДАМЕНТАЛЬНЫЕ ПРОБЛЕМЫ МЕТРОЛОГИИFUNDAMENTAL PROBLEMS OF METROLOGYРасщепление частоты свободной нутации ядра в магнитном поле ЗемлиКузнецоваЛ. А.leila@lnfm1.sai.msu.ruПасынокС. Л.pasynok@vniiftri.ruГосударственный астрономический институт им. П.К. Штернберга МГУ им. М.В. ЛомоносоваRussian FederationВсероссийский научно-исследовательский институт физико-технических и радиотехнических измеренийRussian Federation20140702202306810Copyright © ФГУП "ВНИИФТРИ", 20232023ФГУП "ВНИИФТРИ"ФГУП "ВНИИФТРИ"https://www.izmt.ru/jour/about/submissions#copyrightNoticehttps://www.izmt.ru/jour/article/view/525

Анализ остаточных расхождений принятой теории МАС2000 и измерений последних лет показал, что структура этих расхождений не соответствует предсказанной. Согласно указанной теории детерминированная часть расхождений должна представлять собственные колебания на частоте свободной нутации ядра, однако корреляционный анализ выявляет большее число гармоник. Предложена модель, позволяющая полностью объяснить две главные составляющие в остаточных расхождениях теории и измерений. Полученные периоды совпадают с периодами, выделенными из расхождений модели МАС2000 и результатов измерений.

The analysis of last years measurements has shown that the accepted IAU2000 theory has the best characteristics in comparison with other nutation models. However the analysis of residual divergences of the theory and measurement has shown that the structure of these divergences does not correspond to predictions of IAU2000 nutation theory. According tothis predictions the quasi-systematic part of these divergences should represent its own fluctuations on frequency of the core free nutation. However, the correlation analysis reveals the greater number of harmonics. A model allowing to explain completely the presence of two main components in residual divergences of IAU2000 nutation theory and measurements is suggested. The received periods coincide with periodsalloted from residual divergences of IAU2000 model and the results of measurements.

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The authors declare that there are no conflicts of interest present.