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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Transport automation research</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Transport automation research</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Автоматика на транспорте</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2412-9186</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">117583</article-id>
   <article-id pub-id-type="doi">10.20295/2412-9186-2026-12-01-07-25</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Живучесть, надежность, безопасность</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>VIABILITY, RELIABILITY, SAFETY</subject>
    </subj-group>
    <subj-group>
     <subject>Живучесть, надежность, безопасность</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">A Method for Monitoring the Availability of Required Navigation  Performance for  Locomotive Satellite Navigation Equipment</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>МЕТОД КОНТРОЛЯ ДОСТУПНОСТИ ТРЕБУЕМЫХ НАВИГАЦИОННЫХ ХАРАКТЕРИСТИК ЛОКОМОТИВНОЙ АППАРАТУРЫ СПУТНИКОВОЙ РАДИОНАВИГАЦИОННОЙ СИСТЕМЫ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Демьянов</surname>
       <given-names>Владислав Владимирович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Demyanov</surname>
       <given-names>Vladislav Vladimirovich</given-names>
      </name>
     </name-alternatives>
     <email>vv.emyanov@gmail.com</email>
     <xref ref-type="aff" rid="aff-1"/>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Логинов</surname>
       <given-names>Денис Дмитриевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Loginov</surname>
       <given-names>Denis Dmitrievich</given-names>
      </name>
     </name-alternatives>
     <email>Denis466216@mail.ru</email>
     <xref ref-type="aff" rid="aff-3"/>
    </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">Иркутский государственный университет путей сообщения</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk state transport university</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет</institution>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2026-03-20T00:00:00+03:00">
    <day>20</day>
    <month>03</month>
    <year>2026</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2026-03-20T00:00:00+03:00">
    <day>20</day>
    <month>03</month>
    <year>2026</year>
   </pub-date>
   <volume>12</volume>
   <issue>1</issue>
   <fpage>7</fpage>
   <lpage>25</lpage>
   <history>
    <date date-type="received" iso-8601-date="2026-03-20T00:00:00+03:00">
     <day>20</day>
     <month>03</month>
     <year>2026</year>
    </date>
   </history>
   <self-uri xlink:href="https://atjournal.ru/en/nauka/article/117583/view">https://atjournal.ru/en/nauka/article/117583/view</self-uri>
   <abstract xml:lang="ru">
    <p>Статья посвящена разработке метода контроля доступности требуемых навигационных характеристик локомотивной аппаратуры спутниковых радионавигационных систем при движении по жестко заданной траектории. Актуальность работы обусловлена необходимостью оперативного выявления нарушений требуемых навигационных характеристик при деградации качества позиционирования объекта. Метод основан на анализе параметров эллипса рассеивания погрешности позиционирования, сопоставлении его размеров и ориентации с допустимыми границами безопасности с учетом особенностей движения на перегоне и станции. В отличие от традиционных подходов, основанных на использовании априорных оценок, предложенный индикатор формируется по текущим апостериорным оценкам погрешности позиционирования. Реализация подхода предполагает привязку текущих координат к интерполированной траектории движения на основе цифровой карты маршрута. Работоспособность метода подтверждена численным моделированием типовых сценариев деградации  качества позиционирования и экспериментальными данными, полученными на подвижном объекте.  Показано, что при нерегулярных воздействиях окружающих объектов инфраструктуры изменяются  размеры и ориентация эллипса рассеивания, что позволяет своевременно выявлять нарушение  требуемых навигационных характеристик и определять направление максимальной погрешности.  Метод ориентирован на применение в бортовых системах высокоточного позиционирования железнодорожного транспорта и в системах автоматизированного управления движением поездов.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>this paper proposes a method for monitoring the availability of required navigation performance of locomotive satellite navigation equipment operating  along a rigidly defined trajectory. The study is motivated by the necessity to detect,  in real time, violations of required navigation performance when the navigation  solution degrades. The method is founded on analysis of the positioning error ellipse parameters and on comparing its size and orientation with permissible safety bound aries, while accounting for the specific characteristics of train operation on railway  line sections and within stations. The proposed indicator is generated from current  a posteriori estimates of positioning error, in contrast to conventional techniques  that depend on a priori estimates. The approach is implemented by referencing the instantaneous coordinates to an interpolated trajectory derived from a digital track  map. Numerical simulations of representative navigation-degradation scenarios to gether with experimental data obtained from a moving platform have confirmed the  method’s effectiveness. It has been demonstrated that the size and orientation of the  error ellipse vary in response to anomalous disturbances, permitting rapid detection of breaches of required navigation performance and identification of the direction  of maximum positioning error. The method is intended for automated train control applications and onboard high-precision positioning systems in railway transport.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>спутниковая навигация</kwd>
    <kwd>контроль доступности</kwd>
    <kwd>требуемые навигационные  характеристики</kwd>
    <kwd>железнодорожный транспорт</kwd>
    <kwd>эллипс рассеивания погрешности</kwd>
    <kwd>устройства  железнодорожной автоматики и телемеханики</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>satellite navigation</kwd>
    <kwd>availability monitoring</kwd>
    <kwd>required navigation  performance</kwd>
    <kwd>railway transport</kwd>
    <kwd>positioning error dispersion ellipse</kwd>
    <kwd>railway  automation and remote control devicess</kwd>
   </kwd-group>
  </article-meta>
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