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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">pimi</journal-id><journal-title-group><journal-title xml:lang="ru">Приборы и методы измерений</journal-title><trans-title-group xml:lang="en"><trans-title>Devices and Methods of Measurements</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-9506</issn><issn pub-type="epub">2414-0473</issn><publisher><publisher-name>BNTU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2220-9506-2019-10-4-331-340</article-id><article-id custom-type="elpub" pub-id-type="custom">pimi-528</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>Средства измерений</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Measuring instruments</subject></subj-group></article-categories><title-group><article-title>Моделирование работы навигационного приёмника для сверхмалого космического аппарата</article-title><trans-title-group xml:lang="en"><trans-title>Simulation of Navigation Receiver for Ultra-Small Satellite</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>Спиридонов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Spiridonov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адрес для переписки: А.А. Спиридонов – Белорусский государственный университет, ул. Курчатова, 5, г. Минск 220045, Беларусь      e-mail: sansan@tut.by</p></bio><bio xml:lang="en"><p>Address for correspondence: A.A. Spiridonov – Belarusian State University, Kurchatova str., 5, Minsk 220045, Belarus     e-mail: sansan@tut.by</p></bio><email xlink:type="simple">sansan@tut.by</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>Ушаков</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ushakov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"><p>Kurchatova str., 5, Minsk 220045, Belarus</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саечников</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Saechnikov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian State University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>12</day><month>12</month><year>2019</year></pub-date><volume>10</volume><issue>4</issue><fpage>331</fpage><lpage>340</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Спиридонов А.А., Ушаков Д.В., Саечников В.А., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Спиридонов А.А., Ушаков Д.В., Саечников В.А.</copyright-holder><copyright-holder xml:lang="en">Spiridonov A.A., Ushakov D.V., Saechnikov V.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://pimi.bntu.by/jour/article/view/528">https://pimi.bntu.by/jour/article/view/528</self-uri><abstract><p>В настоящее время к сверхмалым космическим аппаратам предъявляются жёсткие требования в части точности определения положения спутника на орбите, при этом на спутник накладываются ограничения по массе, габаритам и потребляемой мощности. Целью данной работы являлось моделирование работы навигационного приёмника сверхмалого космического аппарата с ограничениями по энергопотреблению и вычислительным ресурсам.</p><p>Рассмотрены условия эксплуатации и определены требования к бортовому навигационному приёмнику сверхмалого космического аппарата. Описана работа на начальной стадии эксплуатации навигационного приёмника, тестирование работоспособности, детектирование ошибок, анализ достоверности решения задачи навигационно-временного определения.</p><p>Разработана структура задач проектной баллистики по прогнозированию орбит сверхмалого космического аппарата и навигационных спутников, интервалов радиовидимости для систем ГЛОНАСС и GPS, а также параметров навигационных сигналов.</p><p>Для предполагаемой орбиты спутника СubeBel-1 проведено численное моделирование орбитального движения относительно спутников систем GPS и ГЛОНАСС. Рассчитана динамика доплеровского сдвига частоты сигналов спутника GPS в приёмнике без ограничений по относительной скорости движения за одни сутки. Для спутников систем GPS и ГЛОНАСС рассчитаны интервалы радиовидимости и определены оптимальные условия для холодного старта навигационного приёмника с ограничением по относительной скорости (Vотн &lt; 500 м/c) за 1 ч работы как при отдельной, так и при совместной работе по обеим системам.</p><p>Для отработки методов верификации экспериментальных данных спутника СubeBel-1 исследована работа навигационного приёмника спутника Nsight по данным принимаемой телеметрии от начала его полёта до момента выхода в стабильный режим работы. Показано, что данные телеметрии навигационного приёмника на этапе тестирования имели существенную ошибку. После программной корректировки навигационный приёмник работал стабильно в течении всей недели наблюдения, ошибка измерений долготы и широты не превышала 0,2°.</p></abstract><trans-abstract xml:lang="en"><p>Currently, ultra-small satellite aresubjectstostringentrequirementsintermsoftheaccuracyof determining the position of the satellite in orbit, while the satellite is the subject to restrictions on mass, size and power consumption. The aim of this work is to simulate of navigation receiver operation for the ultra-small satellite with restrictions on energy consumption and computational resources.</p><p>The operating conditions are considered and the requirements to the onboard navigation receiver for the ultra-small satellite are determined. The navigation receiver operation at the initial stage, performance testing, error detection, analysis of the reliability of the solution of the navigation-time determination problem are described.</p><p>The structure of the design ballistics problems for orbit prediction of ultra-small spacecraft and navigation satellites, radio visibility intervals for GLONASS and GPS systems, parameters of navigation signals have been developed.</p><p>The motion relative to the satellite systems GPS and GLONASS for a preliminary orbit of СubeBel-1 have been simulated. The Doppler dynamics of the GPS satellite signals in the receiver without restrictions on the relative speed for one day has been calculated. Radio visibility intervals for GPS and GLONASS satellites were calculated and optimal conditions for the cold start of the navigation receiver with a relative speed limit (Vr &lt; 500 m/s) for 1 hour of operation both in separate and in joint operation on both systems were determined.</p><p>To test the verification methods of the experimental data of the СubeBel-1 satellite, the operation of the navigation receiver of the Nsight satellite was studied according to the received telemetry from the beginning of its flight until the moment it entered stable operation.It is shown that the telemetry data of the navigation receiver at the testing stage had a significant error. After software correction, the navigation receiver worked steadily throughout the week of observation, the error of longitude and latitude measurements did not exceed 0.2 degrees.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сверхмалый космический аппарат</kwd><kwd>навигационный приёмник</kwd><kwd>проектная баллистика</kwd><kwd>орбитальное движение</kwd><kwd>интервалы радиовидимости</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultra-small satellite</kwd><kwd>navigation receiver</kwd><kwd>project ballistics</kwd><kwd>orbital motion</kwd><kwd>radio visibility intervals</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках Государственной программы научных исследований Республики Беларусь «Информатика, космос и безопасность» (подпрограмма «Информатика и космические исследования»).</funding-statement><funding-statement xml:lang="en">The work was performed as part of the implementation of the State program of scientific research of the Republic of Belarus "Informatics, space and security" (Program "Informatics and space research".</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Фортескью, П. 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