<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Earth Research from Space</journal-id><journal-title-group><journal-title xml:lang="en">Earth Research from Space</journal-title><trans-title-group xml:lang="ru"><trans-title>Исследование Земли из космоса</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0205-9614</issn><issn publication-format="electronic">3034-5405</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">12723</article-id><article-id pub-id-type="doi">10.31857/S0205-9614201923-13</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ФИЗИЧЕСКИЕ ОСНОВЫ ИССЛЕДОВАНИЯ ЗЕМЛИ ИЗ КОСМОСА</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">On evaluation of depth of soil freezing based on Smos satellite data</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка глубины промерзания почвенного покрова по данным спутника Smos</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Boyarskii</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Боярский</surname><given-names>Д. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dboyarski@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Romanov</surname><given-names>A. N.</given-names></name><name xml:lang="ru"><surname>Романов</surname><given-names>А. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dboyarski@rambler.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khvostov</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Хвостов</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dboyarski@rambler.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tikhonov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Тихонов</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dboyarski@rambler.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharkov</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Шарков</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dboyarski@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Space Research, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт космических исследований РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Water and Environmental Problems SB RAS</institution></aff><aff><institution xml:lang="ru">Институт водных и экологических проблем СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Moscow Institute of Physics and Technology (State University)</institution></aff><aff><institution xml:lang="ru">Московский физико-технический институт (государственный университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-05-21" publication-format="electronic"><day>21</day><month>05</month><year>2019</year></pub-date><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>3</fpage><lpage>13</lpage><history><date date-type="received" iso-8601-date="2019-05-19"><day>19</day><month>05</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Russian academy of sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Российская академия наук</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Russian academy of sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/0205-9614/article/view/12723">https://journals.eco-vector.com/0205-9614/article/view/12723</self-uri><abstract xml:lang="en"><p>The results of a comparative analysis of the brightness temperatures determined from the SMOS satellite and the corresponding depths of soil freezing, measured at weather stations located at the test sites of the Kulunda Plain, are presented. Based on the daily satellite measurement of brightness temperature, the effect of soil freezing on the microwave radiation of the underlying surface was studied. A theoretical calculation of the dependence of soil brightness temperature on the depth of freezing is performed with the model of microwave radiation of a plane-layered inhomogeneous non-isothermal medium. The real parameters of the Kulunda plain soil as well as the climatic characteristics of the sites under study, obtained from the weather stations for the same period, were used as the input parameters of the model. The analysis of satellite, field and model data showed that the evaluation of the depth of soil freezing with satellite microwave radiometry is limited by the need to conduct the contact measurements of physical properties of soil in the areas, for which the SMOS product on the brightness temperature is given.</p></abstract><trans-abstract xml:lang="ru"><p>Приведены результаты сравнительного анализа яркостных температур, полученных спутником SMOS (Soil Moisture and Ocean Salinity), и соответствующих им глубин промерзания почвы, измеренных на метеостанциях, расположенных на тестовых участках Кулундинской равнины. На основе ежедневных спутниковых измерений яркостных температур изучено влияние процессов промерзания почвы на микроволновое излучение подстилающей поверхности. С использованием модели микроволнового излучения плоскослоистой неоднородной, неизотермической среды выполнен теоретический расчет зависимости яркостной температуры почвы от глубины промерзания. В качестве входных параметров модели использовались реальные параметры почв Кулундинской равнины, а также климатические характеристики исследуемых областей, полученные на метеостанциях за этот же период. Из анализа спутниковых и полевых данных, а также модельных расчетов следует, что для оценки глубины промерзания почвы по ежедневным данным спутниковой микроволновой радиометрии необходимо знать дату начала замерзания почвенного покрова, а также диэлектрические характеристики мерзлой и незамерзшей почвы на тех участках, по которым выдается продукт SMOS по яркостной температуре. На основе спутниковых данных и модели микроволнового излучения почвы с верхним мерзлым слоем предложен способ определения глубины промерзания почвенного покрова.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Kulunda plain</kwd><kwd>seasonally frozen soils</kwd><kwd>depth of freezing</kwd><kwd>brightness temperature</kwd><kwd>microwave range</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Кулундинская равнина</kwd><kwd>сезонно-мерзлые почвы</kwd><kwd>глубина промерзания</kwd><kwd>яркостная температура</kwd><kwd>микроволновый диапазон</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian foundation for basic research</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский фонд фундаментальных исследований</institution></institution-wrap></funding-source><award-id></award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian foundation for basic research</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский фонд фундаментальных исследований</institution></institution-wrap></funding-source><award-id></award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian foundation for basic research</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский фонд фундаментальных исследований</institution></institution-wrap></funding-source><award-id></award-id></award-group><funding-statement xml:lang="ru">РФФИ</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Bogorodsky V.V., Kozlov A.I., Tuchkov L.T. Radioteplovoe izluchenie zemnykh pokrovov [Radiothermal radiation of the earth covers], Leningrad: Gidrometeoizdat, 1977. 224 p.(in Russian).</mixed-citation><mixed-citation xml:lang="ru">Боярский Д.А., Тихонов В.В. Модель эффективной диэлектрической проницаемости влажных и мерзлых почв в сверхвысокочастотном диапазоне // Радиотехника и электроника. 1995. Т. 40.№ 6. С. 914-917.</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><citation-alternatives><mixed-citation xml:lang="en">Boyarskii D.A., Tikhonov V.V. Effective Permittivity Microwave Model for Wet and Frozen Soils, Journal of Communications Technology and Electronics. 1995. V. 40. № 9. P. 51–54. (in Russian).</mixed-citation><mixed-citation xml:lang="ru">Боярский Д.А., Тихонов В.В. Влияние связанной воды на диэлектрическую проницаемость влажных и мерзлых почв. Препринт ИКИ РАН. Пр-2084, 2003. 48 стр.</mixed-citation></citation-alternatives></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Boyarskii D.A., Tikhonov V.V. Vliyanie svyazannoi vody na diehlektricheskuyu pronitsaemost' vlazhnykh i merzlykh pochv [Influence of the Bound Water on Dielectric Permeability Wet and Frozen Soil], Moscow: Preprint SRI RAS, Pr-2084. 2003. 48 p. (in Russian).</mixed-citation><mixed-citation xml:lang="ru">Богородский В.В., Козлов А.И., Тучков Л.Т. Радиотепловое излучение земных покровов. Л.: Гидрометеоиздат. 1977. 224 с.</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Boyarskii D.A., Tikhonov V.V., Komarova N.Yu. Model of Dielectric Constant of Bound Water in Soil for Applications of Microwave Remote Sensing // Progress In Electromagnetics Research. 2002. V. 35. P. 251–269.</mixed-citation><mixed-citation xml:lang="ru">Кауричев И.С., Громыко И.Д. (под ред.). Атлас почв СССР. М.: Колос. 1974. 168 с.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Gutierrez A., Castro R. SMOS L1 Processor L1c Data Processing Model//SO-DS-DME-L1PP-0009. № 2.7. 31 May 2010. URL: http://www.smos.com.pt/downloads/release/documents/SO-DS-DME-L1PP-0009-DPM -L1c.pdf.</mixed-citation><mixed-citation xml:lang="ru">Клепиков И.Н., Шарков Е.А. Излучение неоднородных неизотермических сред. Препринт. Пр-801. М.: ИКИ АН СССР. 1983. 31 с.</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">Han L., Tsunekawa A., Tsubo M. Monitoring near-surface soil freeze–thaw cycles in northern China and Mongolia from 1998 to 2007 // International Journal of Applied Earth Observation and Geoinformation. 2010. V. 12. № 5. P. 375–384.</mixed-citation><mixed-citation xml:lang="ru">Татаринцев В.Л. Гранулометрия агропочв юга Западной Сибири и их физическое состояние. Автореферат диссертации на соискание ученой степени доктора сельскохозяйственных наук. Барнаул: Алтайский государственный аграрный университет. 2008. 42 с.</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><citation-alternatives><mixed-citation xml:lang="en">Jin R., Li X., Che T. A decision tree algorithm for surface soil freeze/thaw classification over China using SSM/I brightness temperature // Remote Sensing of Environment. 2009. V. 113. № 12. P. 2651–2660.</mixed-citation><mixed-citation xml:lang="ru">Boyarskii D.A., Tikhonov V.V., Komarova N.Yu. Model of Dielectric Constant of Bound Water in Soil for Applications of Microwave Remote Sensing. // Progress In Electromagnetics Research. 2002. V. 35. P. 251–269.</mixed-citation></citation-alternatives></ref><ref id="B8"><label>8.</label><citation-alternatives><mixed-citation xml:lang="en">Kalantari P., Bernier M., McDonal K.C., Poulin J. Using SMOS passive microwave data to develop SMAP freeze/thaw algorithms adapted for the Canadian subarctic // International Conference on Sensors and Models in Remote Sensing and Photogrammetry. 2015. V. 41. № W5. P. 365–368.</mixed-citation><mixed-citation xml:lang="ru">Gutierrez A., Castro R. SMOS L1 Processor L1c Data Processing Model//SO-DS-DME-L1PP-0009. № 2.7. 31 May 2010. URL: http://www.smos.com.pt/downloads/release/documents/SO-DS-DME-L1PP-0009-DPM -L1c.pdf</mixed-citation></citation-alternatives></ref><ref id="B9"><label>9.</label><citation-alternatives><mixed-citation xml:lang="en">Kaurichev I.S., Gromyko I.D. (eds). Atlas pochv SSSR [Atlas of soils of the USSR], Moscow: Kolos, 1974. 168 p. (in Russian).</mixed-citation><mixed-citation xml:lang="ru">Han L., Tsunekawa A., Tsubo M. Monitoring near-surface soil freeze–thaw cycles in northern China and Mongolia from 1998 to 2007 // International Journal of Applied Earth Observation and Geoinformation. 2010. V. 12. № 5. P. 375–384.</mixed-citation></citation-alternatives></ref><ref id="B10"><label>10.</label><citation-alternatives><mixed-citation xml:lang="en">Klepikov I.N., Sharkov E.A. Izluchenie neodnorodnykh neizotermicheskikh sred [Radiation of inhomogeneous non-isothermal media], Preprint SRI USSR Academy of Sciences, 1983. 31 p. (in Russian).</mixed-citation><mixed-citation xml:lang="ru">Jin R., Li X., Che T. A decision tree algorithm for surface soil freeze/thaw classification over China using SSM/I brightness temperature // Remote Sensing of Environment. 2009. V. 113. № 12. P. 2651–2660.</mixed-citation></citation-alternatives></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">Leroux D.J., Kerr Y.H.,Richaume P., Fieuzal R. Spatial distribution and possible sources of SMOS errors at the global scale // Remote Sensing of Environment. 2013. V. 133. P. 240–250.</mixed-citation><mixed-citation xml:lang="ru">Kalantari P., Bernier M., McDonal K.C., Poulin J. Using SMOS passive microwave data to develop SMAP freeze/thaw algorithms adapted for the Canadian subarctic // International Conference on Sensors and Models in Remote Sensing and Photogrammetry. 2015. V. 41. № W5. P. 365–368.</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">Montpetit B., Royer A., Roy A., Langlois A. In-situ passive microwave emission model parameterization of sub-arctic frozen organic soils // Remote Sensing of Environment. 2018. V. 205. P. 112–118.</mixed-citation><mixed-citation xml:lang="ru">Leroux D.J., Kerr Y.H.,Richaume P., Fieuzal R. Spatial distribution and possible sources of SMOS errors at the global scale // Remote Sensing of Environment. 2013. V. 133. P. 240–250.</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><citation-alternatives><mixed-citation xml:lang="en">Njoku E.C., Kong J.A. Theore for passive microwave remote sensing of near-surface soil moisture // Journal of GeophusikalReseach. 1977. V. 82. № 20. P. 3108–3118.</mixed-citation><mixed-citation xml:lang="ru">Montpetit B., Royer A., Roy A., Langlois A. In-situ passive microwave emission model parameterization of sub-arctic frozen organic soils // Remote Sensing of Environment. 2018. V. 205. P. 112–118.</mixed-citation></citation-alternatives></ref><ref id="B14"><label>14.</label><citation-alternatives><mixed-citation xml:lang="en">Pinori S., Crapolicchio R., Mecklenburg S. Preparing the ESA-SMOS (Soil Moisture and Ocean Salinity) mission - Overview of the user data products and data distribution strategy // Microwave Radiometry and Remote Sensing of the Environment. 2008. MICRORAD 2008. DOI: 10.1109/MICRAD.2008.4579480.</mixed-citation><mixed-citation xml:lang="ru">Njoku E.C., Kong J.A. Theore for passive microwave remote sensing of near-surface soil moisture // Journal of GeophusikalReseach. 1977. V. 82. № 20. P. 3108–3118.</mixed-citation></citation-alternatives></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">Rautiainen K., Lemmetyinen J., Schwank M., Kontu A., Pulliainen J. Detection of soil freezing from L-band passive microwave observations // Remote Sensing of Environment. 2014. V. 147. P. 206–218.</mixed-citation><mixed-citation xml:lang="ru">Pinori S., Crapolicchio R., Mecklenburg S. Preparing the ESA-SMOS (Soil Moisture and Ocean Salinity) mission - Overview of the user data products and data distribution strategy // Microwave Radiometry and Remote Sensing of the Environment. 2008. MICRORAD 2008. DOI: 10.1109/MICRAD.2008.4579480.</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">Rautiainen K., Parkkinen T., Lemmetyinen J., Schwank M., Wiesmann A., Ikonen J., Derksen C., Davydov S., Davydova A., Boike J., Langer M., Drusc M., Pulliainen J. SMOS prototype algorithm for detecting autumn soil freezing // Remote Sensing of Environment. 2016. V. 180. P. 346–360.</mixed-citation><mixed-citation xml:lang="ru">Rautiainen K., Lemmetyinen J., Schwank M., Kontu A., Pulliainen J. Detection of soil freezing from L-band passive microwave observations // Remote Sensing of Environment. 2014. V. 147. P. 206–218.</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Sahr K., White D., Kimerling A.J. Geodesic Discrete Global Grid Systems // Cartography and Geographic Information Science. 2003. V. 30. № 2. P. 121–134.</mixed-citation><mixed-citation xml:lang="ru">Rautiainen K., Parkkinen T., Lemmetyinen J., Schwank M., Wiesmann A., Ikonen J., Derksen C., Davydov S., Davydova A., Boike J., Langer M., Drusc M., Pulliainen J. SMOS prototype algorithm for detecting autumn soil freezing // Remote Sensing of Environment. 2016. V. 180. P. 346–360.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><citation-alternatives><mixed-citation xml:lang="en">Sharkov E.A. Passive Microwave Remote Sensing of the Earth: Physical Foundations. Berlin, Heidelberg, London, New York etc: Springer/PRAXIS. 2003. 613 p.</mixed-citation><mixed-citation xml:lang="ru">Sahr K., White D., Kimerling A.J. Geodesic Discrete Global Grid Systems // Cartography and Geographic Information Science. 2003. V. 30. № 2. P. 121–134.</mixed-citation></citation-alternatives></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">Schwank M.,Stahli M.,Wydler H.et al. Microwave L-band emission of freezing soil // IEEE Transactions on Geoscience and Remote Sensing. 2004. V. 42.N. 6.P. 1252–1261.</mixed-citation><mixed-citation xml:lang="ru">Sharkov E.A. Passive Microwave Remote Sensing of the Earth: Physical Foundations. Berlin, Heidelberg, London, New York etc: Springer/PRAXIS. 2003. 613 p.</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><citation-alternatives><mixed-citation xml:lang="en">Schwank M., Rautiainen K., Matzler C., Stähli M., Wegmuller U. Model for microwave emission of a snow-covered ground with focus on L band // Remote Sensing of Environment. 2014. V. 154. P. 180–191.</mixed-citation><mixed-citation xml:lang="ru">Schwank M., Stahli M.,Wydler H. et al. Microwave L-band emission of freezing soil. // IEEE Transactions on Geoscience and Remote Sensing. 2004. V. 42. № 6. P. 1252–1261.</mixed-citation></citation-alternatives></ref><ref id="B21"><label>21.</label><citation-alternatives><mixed-citation xml:lang="en">Shati F., Prakash S., Norouzi H., Blake R. Assessment of differences between near-surface air and soil temperatures for reliable detection of high-latitude freeze and thaw states //</mixed-citation><mixed-citation xml:lang="ru">Schwank M., Rautiainen K., Matzler C., Stähli M., Wegmuller U. Model for microwave emission of a snow-covered ground with focus on L band // Remote Sensing of Environment. 2014. V. 154. P. 180–191.</mixed-citation></citation-alternatives></ref><ref id="B22"><label>22.</label><citation-alternatives><mixed-citation xml:lang="en">Cold Regions Science and Technology. 2018. V. 145. P. 86–92.</mixed-citation><mixed-citation xml:lang="ru">Shati F., Prakash S., Norouzi H., Blake R. Assessment of differences between near-surface air and soil temperatures for reliable detection of high-latitude freeze and thaw states // Cold Regions Science and Technology. 2018. V. 145. P. 86–92.</mixed-citation></citation-alternatives></ref><ref id="B23"><label>23.</label><mixed-citation>Song L., Zhang X., Li H. Dielectric constants of deep frozen clay soils of Longgu mine (0.1∼1GHz) // Procedia Earth and Planetary Science. 2009. V. 1. № 1. P. 519–523.</mixed-citation></ref><ref id="B24"><label>24.</label><citation-alternatives><mixed-citation xml:lang="en">Tatarintsev V. L. Granulometriya agropochv yuga Zapadnoi Sibiri i ikh fizicheskoe sostoyanie: Avtoreferat Diss. dok. sel'skokhozyaistvennykh nauk [Granulometry of agricultural soils of the South of Western Siberia and their physical condition. Doc. agricultural sci. thesis], Barnaul: Altai state agrarian University, 2008. 42 p. (in Russian).</mixed-citation><mixed-citation xml:lang="ru">Zhang T., Armstrong R.L. Soil freeze/thaw cycles over snow-free land detected by passive microwave remote sensing // Geophysical Research Letters. 2001. V. 28. № 5. P. 763–766.</mixed-citation></citation-alternatives></ref><ref id="B25"><label>25.</label><citation-alternatives><mixed-citation xml:lang="en">Zhang T., Armstrong R.L. Soil freeze/thaw cycles over snow-free land detected by passive microwave remote sensing // Geophysical Research Letters. 2001. V. 28. № 5. P. 763–766.</mixed-citation><mixed-citation xml:lang="ru">Zhang L.X., Zhao K.G., Zhu Y.,et al. Simulated radiation characteristics of frozen soil surface at typical microwave bands // IEEE International Geoscience and Remote Sensing Symposium. Anchorage. Sep. 20-24, 2004. IGARSS 2004. P. 4310–4313.</mixed-citation></citation-alternatives></ref><ref id="B26"><label>26.</label><citation-alternatives><mixed-citation xml:lang="en">Zhang L.X., Zhao K.G., Zhu Y.,et al. Simulated radiation characteristics of frozen soil surface at typical microwave bands // IEEE International Geoscience and Remote Sensing Symposium. Anchorage. Sep. 20-24, 2004. IGARSS 2004.P. 4310–4313.</mixed-citation><mixed-citation xml:lang="ru">Zhao T., Shi J., Zhang L. 4.13 - Surface Soil Freeze/Thaw State. Environmental Sciences. Comprehensive Remote Sensing. 2018. V. 4. P. 315–332. https://doi.org/10.1016/B978-0-12-409548-9.10362-8</mixed-citation></citation-alternatives></ref><ref id="B27"><label>27.</label><mixed-citation>Zhao T., Shi J., Zhang L. 4.13 - Surface Soil Freeze/Thaw State. Environmental Sciences. Comprehensive Remote Sensing. 2018. V. 4. P. 315–332. https://doi.org/10.1016/B978-0-12-409548-9.10362-8.</mixed-citation></ref></ref-list></back></article>
