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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Solnechno-Zemnaya Fizika</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Solnechno-Zemnaya Fizika</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Солнечно-земная физика</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="online">2712-9640</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">36573</article-id>
   <article-id pub-id-type="doi">10.12737/szf-63202004</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Результаты  исследований</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Results of current research</subject>
    </subj-group>
    <subj-group>
     <subject>Результаты  исследований</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Long-term solar flux observations with Irkutsk Incoherent Scatter Radar (IISR) in 2011–2019</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Длительные наблюдения солнечного потока в 2011–2019 гг. на Иркутском радаре некогерентного рассеяния (ИРНР)</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Сетов</surname>
       <given-names>Артём Геннадьевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Setov</surname>
       <given-names>Artem Gennadyevich</given-names>
      </name>
     </name-alternatives>
     <email>artemsetov@gmail.com</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Кушнарев</surname>
       <given-names>Дмитрий Сергеевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Kushnarev</surname>
       <given-names>Dmitriy Sergeevich</given-names>
      </name>
     </name-alternatives>
     <email>ds_k@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8758-7964</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Васильев</surname>
       <given-names>Роман Валерьевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Vasilyev</surname>
       <given-names>Roman Valeryevich</given-names>
      </name>
     </name-alternatives>
     <email>roman_vasilyev@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0660-8474</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Медведев</surname>
       <given-names>Андрей Всеволодович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Medvedev</surname>
       <given-names>Andrey Vsevolodovich</given-names>
      </name>
     </name-alternatives>
     <email>medvedev@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>доктор физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-4"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar-Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar-Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar-Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <volume>6</volume>
   <issue>3</issue>
   <fpage>33</fpage>
   <lpage>39</lpage>
   <self-uri xlink:href="https://naukaru.ru/en/nauka/article/36573/view">https://naukaru.ru/en/nauka/article/36573/view</self-uri>
   <abstract xml:lang="ru">
    <p>Иркутский радар некогерентного рассеяния (ИРНР), представляющий собой вытянутую рупорную антенну, работает в метровом диапазоне (154–162 МГц) с лучом 0.5°×20° и частотным принципом сканирования, позволяющим наклонять луч на 30° на юг. Помимо активных измерений состояния ионосферы и мониторинга космических объектов, на радаре регулярно проводятся пассивные радиоастрономические наблюдения. С мая по август Солнце проходит через сектор сканирования радара и может находиться в максимуме диаграммы направленности около двух часов. Известная форма диаграммы направленности и высокая чувствительность приемного тракта позволяют в это время проводить откалиброванные измерения солнечного потока в единицах sfu (solar flux units). Мы разрабо¬тали новый подход к калибровке, применимый ко всем архивным пассивным данным ИРНР. В статье представлены длительные наблюдения (2011–2019 гг.) солнечного потока в мае и в летнее время. Описана методика проведения измерений, представлены значения среднесуточного солнечного потока за этот период пассивных наблюдений и проведено сравнение с индексом солнечной активности F10.7 и измерениями солнечного потока в австралийской обсерватории Learmonth на частоте 245 МГц. Показано, что среднесуточный поток за период наблюдения на частоте ~161 МГц в основном принимает значения от 5 до 10 sfu.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Irkutsk incoherent scatter radar (IISR) is an oblongish horn antenna that operates in a meter waveband (154–162 MHz), has a 0.5°×20° beam, and a frequency steering allowing us to tilt the beam by 30° to the south. Besides active measurements of ionospheric conditions and monitoring of space objects, the radar is regularly used for passive radio astronomical observations. From May to August, the Sun crosses the radar field of view and can be in the maximum of the radiation pattern for about two hours. The known shape of the radiation pattern and the high sensitivity of the receiver allow us to conduct calibrated measurements of the solar flux in solar flux units during this period. We have developed a new approach to the calibration, which can be applied to all IISR archival passive data. In the paper, we present long-term observations (2011–2019) of the solar flux in May and summer. We describe the measurement method, present daily average values of the solar flux for this period of passive measurements, and compare it with the solar activity F10.7 index and solar flux measurements made at the Australian observatory Learmonth at 245 MHz. We show that the daily average flux for the period of observations at a frequency of ~161 MHz generally has values from 5 to 10 sfu.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>солнечный поток</kwd>
    <kwd>ИРНР</kwd>
    <kwd>калибровка</kwd>
    <kwd>F10.7</kwd>
    <kwd>Learmonth</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>solar flux</kwd>
    <kwd>IISR</kwd>
    <kwd>calibration</kwd>
    <kwd>F10.7</kwd>
    <kwd>Learmonth</kwd>
   </kwd-group>
  </article-meta>
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 </body>
 <back>
  <ref-list>
   <ref id="B1">
    <label>1.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Васильев Р.В., Глоба М.В., Кушнарев Д.С. и др. Модель сигнала дискретного космического радиоисточника для Иркутского радара некогерентного рассеяния // XXV Всероссийская открытая конференция «Распространение радиоволн». Томск, 2016. Т. 3. С. 122-125.</mixed-citation>
     <mixed-citation xml:lang="en">Benz A.O., Monstein C., Meyer H. CALLISTO - A new concept for solar radio spectrometers. Solar Phys. 2005, vol. 226. pp. 143-151. DOI: 10.1007/s11207-005-5688-9.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B2">
    <label>2.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Васильев Р.В., Кушнарев Д.С., Кашапова Л.К. и др. Первые результаты радионаблюдений Солнца и мощных дискретных источников на Иркутском радаре // Астрономический журнал. 2013. Т. 90, № 11. С. 948-958. DOI: 10.7868/S0004629913110078.</mixed-citation>
     <mixed-citation xml:lang="en">Bilitza D. The importance of EUV indices for the International Reference Ionosphere. Phys. Chem. Earth (C). 2000, vol. 25. no. 5-6, pp. 515-521. DOI: 10.1016/S1464-1917(00)00068-4.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B3">
    <label>3.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Муратова Н.О., Муратов А.А., Кашапова Л.К. Результаты работы нового спектрополяриметра для наблюдения солнечного радиоизлучения в диапазоне 50-500 МГц // Солнечно-земная физика. 2019. Т. 5, № 3. С. 3-10. DOI: 10.12737/szf-53201901.</mixed-citation>
     <mixed-citation xml:lang="en">de Oliveira-Costa A., Tegmark M., Gaensler B.M., Jonas J., Landecker T.L, Reich P. A model of diffuse galactic radio emission from 10 MHz to 100 GHz. Mon. Not. R. Astron. Soc. 2008, vol. 388. pp. 247-260. DOI: 10.1111/j.1365-2966.2008.13376.x.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B4">
    <label>4.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Сетов А.Г., Глоба М.В., Медведев А.В., Васильев Р.В., Кушнарев Д.С. Первые результаты абсолютных измерений потока солнечного излучения на Иркутском радаре некогерентного рассеяния (ИРНР) // Солнечно-земная физика. 2018. Т. 4, № 3. С. 33-38. DOI: 10.12737/szf-43201804.</mixed-citation>
     <mixed-citation xml:lang="en">Dulk G.A., Suzuki S., Sheridan K.V. Solar noise storms: the polarization of storm Type III and related bursts. Astron. Astrophys. 1984, vol. 130, pp. 39-45.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B5">
    <label>5.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Benz A.O., Monstein C., Meyer H. CALLISTO - A new concept for solar radio spectrometers // Solar Phys. 2005. V. 226. P. 143-151. DOI: 10.1007/s11207-005-5688-9.</mixed-citation>
     <mixed-citation xml:lang="en">Giersch O.D., Kennewell J. and Lynch M. Solar radio burst statistics and implications for space weather effects. Space Weather. 2017, vol. 15. no. 11. pp. 1511-1522. DOI: 10.1002/2017SW001658.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B6">
    <label>6.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Bilitza D. The importance of EUV indices for the International Reference Ionosphere // Phys. Chem. Earth (C). 2000. V. 25. N. 5-6. P. 515-521. DOI: 10.1016/S1464-1917(00)00068-4.</mixed-citation>
     <mixed-citation xml:lang="en">Iwai K., Tsuchiya F., Morioka A., Misawa H. IPRT/ AMATERAS: A new metric spectrum observation system for solar radio bursts. Solar Phys. 2012, vol. 277. pp. 447-457. DOI: 10.1007/s11207-011-9919-y.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B7">
    <label>7.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">de Oliveira-Costa A., Tegmark M., Gaensler B.M., et al. A model of diffuse galactic radio emission from 10 MHz to 100 GHz // Mon. Not. R. Astron. Soc. 2008. V. 388. P. 247-260. DOI: 10.1111/j.1365-2966.2008.13376.x.</mixed-citation>
     <mixed-citation xml:lang="en">Kondo T., Isobe T., Igi S., Watari S., Tokumaru M. Hiraiso Radio Spectrograph (HiRAS) for monitoring solar radio bursts. J. Communications Research Laboratory. 1995, vol. 42. no. 1, pp. 111-119.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B8">
    <label>8.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Dulk G.A., Suzuki S., Sheridan K.V. Solar noise storms: the polarization of storm Type III and related bursts // Astron. Astrophys. 1984. V. 130. P. 39-45.</mixed-citation>
     <mixed-citation xml:lang="en">Kontogeorgos A., Tsitsipis P., Caroubalos C., Moussas X., Preka-Papadema P., Hilaris A., et al. The improved ARTEMIS IV multichannel solar radio spectrograph of the University of Athens. Experimental Astronomy. 2006, vol. 21. pp. 41-55. DOI: 10.1007/s10686-006-9066-x.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B9">
    <label>9.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Giersch O.D., Kennewell J. and Lynch M. Solar radio burst statistics and implications for space weather effects // Space Weather. 2017. V. 15. N. 11. P. 1511-1522. DOI: 10.1002/2017SW001658.</mixed-citation>
     <mixed-citation xml:lang="en">Leblanc Y., Le Squeren A.M. Dimensions, Temperature and electron density of the quiet corona. Their variations during the solar cycle. Astron. Astrophys. 1969, vol. 1. pp. 239-248.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B10">
    <label>10.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Iwai K., Tsuchiya F., Morioka A., Misawa H. IPRT/AMATERAS: A new metric spectrum observation system for solar radio bursts // Solar Phys. 2012. V. 277. P. 447-457. DOI: 10.1007/s11207-011-9919-y.</mixed-citation>
     <mixed-citation xml:lang="en">Liu H., Chen Y., Cho K., Feng S., Vasanth V., Koval A., et al. A solar stationary type IV radio burst and its radiation mechanism. Solar Phys. 2018, vol. 293. pp. 58. DOI: 10.1007/s11207-018-1280-y.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B11">
    <label>11.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Kondo T., Isobe T., Igi S., et al. Hiraiso Radio Spectro¬graph (HiRAS) for monitoring solar radio bursts // J. Communications Research Laboratory. 1995. V. 42. N 1. P. 111-119.</mixed-citation>
     <mixed-citation xml:lang="en">Muratova N.O., Muratov A.A., Kashapova L.K. Results of work of new spectropolarimeter for solar radio emission observations in the range 50-500 MHz. Solar-Terr. Phys. 2019, vol. 5. no. 3, pp. 3-9. DOI: 10.12737/stp-53201901.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B12">
    <label>12.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Kontogeorgos A., Tsitsipis P., Caroubalos C., et al. The improved ARTEMIS IV multichannel solar radio spectrograph of the University of Athens // Experimental Astronomy. 2006. V. 21. P. 41-55. DOI: 10.1007/s10686-006-9066-x.</mixed-citation>
     <mixed-citation xml:lang="en">Potekhin A.P., Medvedev A.V., Zavorin A.V., Kushnarev D.S., Lebedev V.P, Lepetaev V.V., Shpynev B.G. Recording and control digital systems of the Irkutsk Incoherent Scatter Radar. Geomagnetism and Aeronomy. 2009, vol. 49. no. 7, pp. 1011-1021. DOI: 10.1134/S0016793209070299.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B13">
    <label>13.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Leblanc Y., le Squeren A.M. Dimensions, temperature and electron density of the quiet corona. Their variations during the solar cycle // Astron. Astrophys. 1969. V. 1. P. 239-248.</mixed-citation>
     <mixed-citation xml:lang="en">Setov A.G., Globa M.V., Medvedev A.V., Vasilyev R.V., Kushnarev D.S. First results of absolute measurements of solar flux at the Irkutsk Incoherent Scatter Radar (IISR). Solar-Terr. Phys. 2018, vol. 4. no. 3, pp. 24-27. DOI: 10.12737/stp-43201804.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B14">
    <label>14.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Liu H., Chen Y., Cho K., et al. A solar stationary type IV radio burst and its radiation mechanism // Solar Phys. 2018. V. 293. P. 58. DOI: 10.1007/s11207-018-1280-y.</mixed-citation>
     <mixed-citation xml:lang="en">Shibasaki K., Alissandrakis C.E., Pohjolainen S. Radio emission of the quiet Sun and active regions (Invited Review). Solar Phys. 2011, vol. 273. pp. 309-337. DOI: 10.1007/ s11207-011-9788-4.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B15">
    <label>15.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Potekhin A.P., Medvedev A.V., Zavorin A.V., et al. Recording and control digital systems of the Irkutsk Incoherent Scatter Radar // Geomagnetism and Aeronomy. 2009. V. 49. N 7. P. 1011-1021. DOI: 10.1134/S0016793209070299.</mixed-citation>
     <mixed-citation xml:lang="en">Tapping K.F. The 10.7 cm solar radio flux (F10.7). Space Weather. 2013, vol. 11. pp. 394-406. DOI: 10.1002/swe.20064.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B16">
    <label>16.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Shibasaki K., Alissandrakis C.E., Pohjolainen S. Radio emission of the quiet Sun and active regions (Invited Review) // Solar Phys. 2011. V. 273. P. 309-337. DOI: 10.1007/s11207-011-9788-4.</mixed-citation>
     <mixed-citation xml:lang="en">Tsurutani B.T., Verkhoglyadova O.P., Mannucci A.J., Lakhina G.S, Li. G., Zank G.P. A brief review of “solar flare effects” on the ionosphere. Radio Sci. 2009, vol. 44. no. RS0A17. DOI: 10.1029/2008RS004029.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B17">
    <label>17.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Tapping K.F. The 10.7 cm solar radio flux (F10.7) // Space Weather. 2013. V. 11. P. 394-406. DOI: 10.1002/swe.20064.</mixed-citation>
     <mixed-citation xml:lang="en">Vasilyev R.V., Globa M.V., Kushnarev D.S., Lebedev V.P., Medvedev A.V., Ratovsky K.G. Model of discrete cos¬mic radiosource signal for Irkutsk incoherent scatter radar. XXV Vserossijskaya otkrytaya konferentsiya «Rasprostranenie radiovoln» [XXV All-Russian Open Conference “Propagation of Radio Waves”]. Tomsk, 2016, vol. 3, pp. 122-125. (In Russian).</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B18">
    <label>18.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Tsurutani B.T., Verkhoglyadova O.P., Mannucci A.J. et al. A brief review of “solar flare effects” on the ionosphere // Radio Sci. 2009. V. 44. N. RS0A17. DOI: 10.1029/ 2008RS004029.</mixed-citation>
     <mixed-citation xml:lang="en">Vasilyev R.V., Kushnarev D.S., Kashapova L.K., Lebedev V.P., Medvedev A.V., Nevedimov N.I., Ratovsky K.G. First results of radio observations of the Sun and powerful discrete sources at Irkutsk Radar. Astronomicheskii zhurnal [Astron. Rep.], 2013, vol. 90. no. 11, pp. 948-958. (In Russian). DOI: 10.7868/S0004629913110078.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B19">
    <label>19.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Verbanac G., Vršnak B., Temmer M., Mandea M., Korte M. Four decades of geomagnetic and solar activity: 1960-2001 // J. Atm. Solar-Terr. Phys. 2010. V. 72. P. 607-616. DOI: 10.1016/j.jastp.2010.02.017.</mixed-citation>
     <mixed-citation xml:lang="en">Verbanac G., Vršnak B., Temmer M., Mandea M., Korte M. Four decades of geomagnetic and solar activity: 1960-2001. J. Atm. Solar-Terr. Phys. 2010, vol. 72. pp. 607-616. DOI: 10.1016/j.jastp.2010.02.017.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B20">
    <label>20.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Zhang J., Richardson I.G., Webb D.F. et al. Solar and interplanetary sources of major geomagnetic storms (Dst ≤ -100 nT) during 1996-2005 // J. Geophys. Res. 2007. V. 112. N A10102. DOI: 10.1029/2007JA012321.</mixed-citation>
     <mixed-citation xml:lang="en">Zhang J., Richardson I.G., Webb D.F. et al. Solar and interplanetary sources of major geomagnetic storms (Dst ≤ -100 nT) during 1996-2005. J. Geophys. Res. 2007, vol. 112. no. A10102. DOI: 10.1029/2007JA012321.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B21">
    <label>21.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">Zirker J.B. Coronal holes and high-speed wind streams // Rev. Geophys. Space Phys. 1977. V. 15. N 3. P. 257-269. DOI: 10.1029/RG015i003p00257.</mixed-citation>
     <mixed-citation xml:lang="en">Zirker J.B. Coronal holes and high-speed wind streams. Rev. Geophys. Space Phys. 1977, vol. 15. no. 3, pp. 257-269. DOI: 10.1029/RG015i003p00257.</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B22">
    <label>22.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">URL: http://ckp-rf.ru/ckp/3056/ (дата обращения 27 июня 2020 г.).</mixed-citation>
     <mixed-citation xml:lang="en">URL: http://ckp-rf.ru/ckp/3056/ (accessed June 27, 2020).</mixed-citation>
    </citation-alternatives>
   </ref>
   <ref id="B23">
    <label>23.</label>
    <citation-alternatives>
     <mixed-citation xml:lang="ru">URL: ftp://ftp-out.sws.bom.gov.au (дата обращения 27 июня 2020 г.).</mixed-citation>
     <mixed-citation xml:lang="en">URL: ftp://ftp-out.sws.bom.gov.au (accessed June 27, 2020).</mixed-citation>
    </citation-alternatives>
   </ref>
  </ref-list>
 </back>
</article>
