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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 pub-id-type="doi">10.32446/0368-1025it.2021-1-32-37</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1722</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>ТЕПЛОФИЗИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THERMOPHYSIC MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Новая реперная точка орбитальной калибровочной шкалы на базе эвтектического сплава In-Bi для применения в высокостабильных опорных бортовых излучателях нового поколения</article-title><trans-title-group xml:lang="en"><trans-title>New fi xed point of on-orbit calibration scale based on the In-Bi eutectic alloy for application in novel high-stable space-borne standard sources</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>Бурдакин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Burdakin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Александрович Бурдакин</p><p>Москва</p></bio><bio xml:lang="en"><p>Andrei A. Burdakin</p><p>Moscow</p></bio><email xlink:type="simple">burdakin-m4@vniiofi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гаврилов</surname><given-names>В. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Gavrilov</surname><given-names>V. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валерий Рудольфович Гаврилов</p><p>Москва</p></bio><bio xml:lang="en"><p>Valerii R. Gavrilov</p><p>Moscow</p></bio><email xlink:type="simple">gavrilov@vniiofi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ус</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Us</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Александровна Ус</p><p>Москва</p></bio><bio xml:lang="en"><p>Ekaterina A. Us</p><p>Moscow</p></bio><email xlink:type="simple">eus@vniiofi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бормашов</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Bormashov</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виталий Сергеевич Бормашов</p><p>Москва</p><p> </p></bio><bio xml:lang="en"><p>Vitalii S. Bormashov</p><p>Moscow</p></bio><email xlink:type="simple">bormashov@vniiofi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт оптико-физических измерений</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Scientific and Research Institute for Optical and Physical Measurements</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>13</day><month>06</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>32</fpage><lpage>37</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/1722">https://www.izmt.ru/jour/article/view/1722</self-uri><abstract><p>Рассмотрена проблема обеспечения стабильности спутниковой аппаратуры наблюдения Земли, ведущей долговременные температурные измерения в тепловом инфракрасном спектральном диапазоне. Для надёжного полётного контроля характеристик спутниковой инфракрасной аппаратуры необходимо повышать стабильность опорных бортовых излучателей. Функцию таких высокостабильных излучателей должны выполнить разрабатываемые в настоящее время бортовые чёрные тела нового поколения, основанные на явлении фазового перехода плавление↔затвердевание. В рамках этих работ требуется создать орбитальную калибровочную шкалу в динамическом температурном диапазоне систем наблюдения Земли 210–350 K из реперных точек температур фазового перехода ряда потенциально пригодных веществ. На реперных точках орбитальной калибровочной шкалы будет построен соответствующий ряд опорных бортовых чёрных тел. Показано, что для решения поставленной задачи следует провести серию космических экспериментов с выбранными реперными точками и прототипами перспективных бортовых чёрных тел на основе фазового перехода. В качестве важной точки будущей орбитальной калибровочной шкалы предложена новая реперная точка температуры плавления эвтектического сплава In-Bi (~345 K). Проанализированы результаты предварительных лабораторных исследований новой реперной точки. Полученные результаты позволили начать подготовку космических экспериментов для исследования сплава In-Bi с целью его применения в опорных бортовых излучателях нового поколения.</p></abstract><trans-abstract xml:lang="en"><p>The problem of ensuring stability of Earth observation space-borne instruments undertaking long-term temperature measurements within thermal IR spectral range is described. For in-flight reliable control of the space-borne IR instruments characteristics the stability of onboard reference sources should be improved. The function of these high-stable sources will be executed by novel onboard blackbodies, incorporating the melt↔freeze phase transition phenomenon, currently being developed. As a part of these works the task of realizing an on-orbit calibration scale within the dynamic temperature range of Earth observation systems 210−350 K based on fixed-point phase transition temperatures of a number of potentially suitable substances is advanced. The corresponding series of the onboard reference blackbodies will be set up on the basis of the on-orbit calibration scale fixed points. It is shown that the achievement of the target lies in carrying out a number of in-flight experiments with the selected fixed points and the prospective onboard fixed-point blackbodies prototypes. The new In-Bi eutectic alloy melt temperature fixed point (~345 K) is proposed as the signifi cant fixed points of the future on-orbit calibration scale. The results of the new fixed point preliminary laboratory studies have been analyzed. The results allowed to start preparation of the in-flight experiments investigating the In-Bi alloy for the purpose of its application in the novel onboard reference sources.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>космический эксперимент</kwd><kwd>орбитальная калибровочная шкала</kwd><kwd>реперная точка температуры</kwd><kwd>сплав In-Bi</kwd><kwd>бортовое чёрное тело</kwd><kwd>фазовый переход</kwd><kwd>эвтектический сплав</kwd></kwd-group><kwd-group xml:lang="en"><kwd>space experiment</kwd><kwd>on-orbit calibration scale</kwd><kwd>fi xed-point temperature</kwd><kwd>In-Bi alloy</kwd><kwd>onboard blackbody</kwd><kwd>phase transition</kwd><kwd>eutectic</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">The Response of the Committee on Earth Observation Satellites (CEOS) to the Global Climate Observing System Implementation Plan 2010 (GCOS IP-10), Edited by CEOS, 2012, 55 p.</mixed-citation><mixed-citation xml:lang="en">The Response of the Committee on Earth Observation Satellites (CEOS) to the Global Climate Observing System Implementation Plan 2010 (GCOS IP-10), Edited by CEOS, 2012, 55 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Victor I. 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