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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">radioelectronics</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений России. Радиоэлектроника</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of the Russian Universities. Radioelectronics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1993-8985</issn><issn pub-type="epub">2658-4794</issn><publisher><publisher-name>Saint Petersburg Electrotechnical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32603/1993-8985-2019-22-1-5-16</article-id><article-id custom-type="elpub" pub-id-type="custom">radioelectronics-285</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>РАДИОТЕХНИЧЕСКИЕ СРЕДСТВА ПЕРЕДАЧИ, ПРИЕМА И ОБРАБОТКИ СИГНАЛОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RADIO ELECTRONIC FACILITIES FOR SIGNAL TRANSMISSION, RECEPTION AND PROCESSING</subject></subj-group></article-categories><title-group><article-title>ОЦЕНКА ПАРАМЕТРОВ ЭХОСИГНАЛА СПУТНИКОВОГО ВЫСОТОМЕРА МЕТОДАМИ СТАТИСТИЧЕСКОЙ ПОДГОНКИ НА СТАДИИ ДООБРАБОТКИ</article-title><trans-title-group xml:lang="en"><trans-title>ESTIMATION OF SATELLITE ALTIMETER ECHO-SIGNAL PARAMETERS BY STATISTICAL FITTING METHODS IN THE COURSE OF RETRACKING</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>Боровицкий</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Borovitsky</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат технических наук (2016), ведущий научный сотрудник</p></bio><bio xml:lang="en"><p>Cand. of Sci. (Engineering) (2016), leading research fellow</p></bio><email xlink:type="simple">dmitry_nepogodin@mail.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>Жестерев</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhesterev</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат технических наук (1982), начальник отдела</p></bio><bio xml:lang="en"><p>Cand. of Sci. (Engineering) (1982), Chief of the Department</p></bio><email xlink:type="simple">zhesterev@mail.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>Ипатов</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Ipatov</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор технических наук (1983), профессор (1985) кафедры радиотехнических систем. Заслуженный деятель науки РФ (2001), почетный радист СССР (1983)</p></bio><bio xml:lang="en"><p>Dr. of Sci. (Engineering) (1983), Professor (1985) of the Department of Radio Engineering Systems. Honored scientist of the RF (2001), honorable radioman of the USSR (1983).</p></bio><email xlink:type="simple">ival1941@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мамчур</surname><given-names>Р. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Mamchur</surname><given-names>R. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>магистр техники и технологий по направлению "Радиотехника" (2015), аспирант и ассистент кафедры радиотехнических систем</p></bio><bio xml:lang="en"><p>Master of Science in Radio Engineering (2015), post-graduate student and assistant of the Department of Radio Engineering Systems</p></bio><email xlink:type="simple">ruslan.mamchur@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>АО "Российский институт радионавигации и времени"</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC "Russian Institute of Radionavigation and Time"</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В. И. Ульянова (Ленина)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg Electrotechnical University "LETI"</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>27</day><month>02</month><year>2019</year></pub-date><volume>0</volume><issue>1</issue><fpage>5</fpage><lpage>16</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Боровицкий Д.С., Жестерев А.Е., Ипатов В.П., Мамчур Р.М., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Боровицкий Д.С., Жестерев А.Е., Ипатов В.П., Мамчур Р.М.</copyright-holder><copyright-holder xml:lang="en">Borovitsky D.S., Zhesterev A.E., Ipatov V.P., Mamchur R.M.</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://re.eltech.ru/jour/article/view/285">https://re.eltech.ru/jour/article/view/285</self-uri><abstract><p>Спутниковым радиовысотомерам принадлежит ключевая роль во многих миссиях дистанционного зондирования Земли из космоса. Данные, поставляемые ими, используются при решении разнообразных фундаментальных и прикладных задач геофизики, океанографии, метеорологии и др. В современных измерительных комплексах обработка данных спутникового альтиметра осуществляется в несколько этапов. Одним из них является наземная дообработка переданной с космического аппарата информации. В настоящей статье исследуются алгоритмы оценки альтиметрических параметров в ходе дообработки данных спутникового высотомера наземным комплексом. Основной задачей петли автосопровождения по времени высотомера на борту космического носителя является надежное удержание принимаемого эхосигнала в следящем окне. Уточненные оценки информационных параметров вырабатываются в наземном сегменте, куда данные с борта космического аппарата сбрасываются по телеметрической линии. Дообработка данных может осуществляться как без опоры на физическую модель эхосигнала, так и с учетом механизма формирования отклика подстилающей поверхности на зондирующий сигнал. В последнем случае существенно повышается достоверность результатов измерения. В статье за основу принята физическая модель отраженного эхосигнала, близкая к классической модели Брауна, синтезированы алгоритмы статистической подгонки ее параметров под наблюдения, а также приведены результаты компьютерного моделирования процедур подгонки по максимуму правдоподобия (МП) и методу наименьших квадратов (МНК). Сопоставление данных моделирования с границами Крамера–Рао демонстрирует заметный проигрыш процедуры МНК по отношению к потенциалу, тогда как экспериментальная точность МП-подгонки практически совпадает с потенциальной.</p></abstract><trans-abstract xml:lang="en"><p>Satellite radar altimeters play a key role in numerous space missions for the remote Earth sensing. The data they provide are used in solving various fundamental and applied problems of geophysics, oceanography, meteorology, etc. In many modern measuring systems the altimeter data is processed in several stages. One of them is the ground-based retracking of the information streamed from the spacecraft. The goal of this work is to study altimeter parameter estimators in the course of the satellite altimeter data retracking by ground-based complex. The main task of delay-lock loop onboard a satellite carrier is a reliable keeping of received echo-signal within the tracking window. More accurate estimates of information parameters are worked out by the ground segment where data from the satellite is delivered via telemetry. Retracking can be performed either without using any physical echo model, or relying on some mechanism under generation of response of an illuminated surface to the probing signal. In the latter case, the measuring results become more trustworthy. The paper deliberations are based on the model close to the classical Brown’s one, they include algorithms of its parameters statistical fitting to the observation and computer simulation of fitting according to the maximal likelihood (ML) and the least squares (LS) methods. The results obtained are compared to the potential attainable and show that while LS fitting yields noticeably to the potential, experimental accuracy of ML-fitting practically coincides with the potential one.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>спутниковый высотомер</kwd><kwd>эхосигнал</kwd><kwd>физическая модель</kwd><kwd>дообработка</kwd><kwd>подгонка</kwd><kwd>дискриминатор</kwd><kwd>оценка по максимуму правдоподобия</kwd><kwd>метод наименьших квадратов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>satellite altimeter</kwd><kwd>echo-signal</kwd><kwd>physical model</kwd><kwd>retracking</kwd><kwd>fitting</kwd><kwd>discriminator</kwd><kwd>maximum likelihood estimate</kwd><kwd>least squares estimate</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">Coastal Altimetry / ed. by S. Vignudelli, A. G. Kostianoy, P. Cipollini, J. Benveniste. 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