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href="http://dbpedia.org">http://dbpedia.org</a>, within Data Space: <a href="http://dbpedia.org">dbpedia.org</a> </div> </div> </div> <div class="row pt-2"> <div class="col-xs-9 col-sm-10"> The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass. Its most common use is in tracking the orbits of satellites and in satellite navigation systems for measuring locations on the surface of the Earth, but it is also used in applications such as tracking crustal motion. </div> <div class="col-xs-3 col-sm-2"> <a href="#" class="thumbnail"> <img src="http://commons.wikimedia.org/wiki/Special:FilePath/Ecef_coordinates.svg?width=300" alt="thumbnail" class="img-fluid" /> </a> </div> </div> </div> </section>   <section> <div class="container-xl"> <div class="row"> <div class="table-responsive"> <table class="table table-hover table-sm table-light"> <thead> <tr> <th class="col-xs-3 ">Property</th> <th class="col-xs-9 px-3">Value</th> </tr> </thead> <tbody> <tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/abstract">dbo:abstract</a> </td><td class="col-10 text-break"><ul> <li style="display:none;">Les coordenades geocèntriques tenen el seu origen en el centre de la Terra i poden ser coordenades cartesianes, coordenades eclíptiques o coordenades equatorials. Per distingir de les que tenen l'origen en el Sol s'afegeix la paraula heliocèntriques o geocèntriques. Així parlarem d'ascensió recta heliocèntrica o ascensió recta geocèntrica. Solen expressar-se en coordenades geocèntriques la Lluna i tots els satèl·lits artificials que tenen la seva òrbita al voltant de la Terra. Els planetes, asteroides i cometes que giren al voltant del Sol, inclosa la Terra solen expressar la seva posició en coordenades heliocèntriques, però com es veu en aquest apartat, acaben sent observador des de la Terra per la qual cosa cal transformar les coordenades heliocèntriques a geocèntriques. En les coordenades geocèntriques el pla de referència sol ser l'Equador terrestre però també s'utilitza l'eclíptica. Els satèl·lits artificials que en general giren propers a la Terra pateixen la manca d'uniformitat de la gravetat terrestre, i això es tradueix en què els seus elements orbitals canvien amb gran celeritat pel que és necessari disposar d'elements recents, si volem calcular la posició amb un mínim d'exactitud. A més el frec amb l'atmosfera causa una desacceleració. Per al cas de la Lluna la seva òrbita és molt complicada perquè el Sol actua amb una força no menyspreable constituint un problema dels tres cossos. Tampoc es poden no considerar les accions de Venus, Júpiter i Saturn. Atesa la complexitat del moviment, els nodes de la Lluna, no estan fixos, sinó que donen una volta en 18,6 anys. L'eix de l'el·lipse lunar no està fix i l'apogeu i perigeu donen una volta completa en 8,85 anys. La inclinació de l'òrbita varia entre 5 º i 5 º 18 '. Així que per a calcular la seva longitud i latitud geocèntriques o la seva ascensió recta i declinació geocèntrica cal considerar centenars de termes. (ca)</li> <li style="display:none;">ECEF (zkratka anglického Earth-Centered, Earth-Fixed), případně také ECR (Earth Centered Rotational) je kartézský souřadnicový systém, sloužící k vyjádření polohy těles vůči Zemi. Střed této souřadnicové soustavy leží v hmotnostním těžišti Země. Zemský povrch se vůči ní prakticky nepohybuje, proto se používá v geodetických a navigačních aplikacích. Umožňuje popis polohy v prostoru bez nutnosti definovat konkrétní referenční elipsoid. Toho využívají ve svých výpočtech. Souřadnicová soustava ECEF rotuje spolu se Zemí. Není proto inerciální. Pokud je třeba inerciální geocentrická soustava (ve skutečnosti ne zcela), používá se například soustava (Earth-centered inertial), která zachovává směr os vůči obloze. (cs)</li> <li style="display:none;">Das geozentrische Koordinatensystem ist ein dreidimensionales rechtwinkliges kartesisches Koordinatensystem mit den Koordinaten X, Y und Z. Sein Koordinatenursprung (0,0,0) liegt im Massenmittelpunkt des jeweils als Modell der Erde gewählten Referenzellipsoids. Die Z-Achse verläuft entlang der mittleren Rotationsachse der Erde. Sie wird vom Internationalen Dienst für Erdrotation (IERS) als IERS-Referenz Pol (IRP) festgelegt, somit werden die aktuell exakten Polbewegungen ignoriert. Die X-Achse verläuft auf der Höhe des Äquators durch den Nullmeridian (Greenwich). Folglich verläuft die Y-Achse, da sie im rechten Winkel zu den anderen beiden Achsen steht, in Höhe des Äquators nach Osten. Die Koordinatenachsen bilden ein Rechtssystem, das sich mit der Erde dreht. So bleibt in ihm der Abstand eines Punktes von einem bestimmten Ort auf der Erdoberfläche immer gleich. Im Bereich der Satellitennavigation wurde das geozentrische Koordinatensystem ECEF (Earth-Centered, Earth-Fixed) definiert. Es wird benutzt, da hier kein spezifisches Ellipsoid angegeben werden muss. (de)</li> <li>The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass. Its most common use is in tracking the orbits of satellites and in satellite navigation systems for measuring locations on the surface of the Earth, but it is also used in applications such as tracking crustal motion. The distance from a given point of interest to the center of Earth is called the geocentric distance, R = (X2 + Y2 + Z2)0.5, which is a generalization of the geocentric radius, R0, not restricted to points on the reference ellipsoid surface.The geocentric altitude is a type of altitude defined as the difference between the two aforementioned quantities: h′ = R − R0; it is not to be confused for the geodetic altitude. Conversions between ECEF and geodetic coordinates (latitude and longitude) are discussed at geographic coordinate conversion. (en)</li> <li style="display:none;">Las coordenadas geocéntricas tienen su origen en el centro de la Tierra y pueden ser coordenadas cartesianas, coordenadas eclípticas o coordenadas ecuatoriales. Para distinguir de las coordenadas heliocéntricas que tienen su origen en el Sol se añade la palabra heliocéntricas o geocéntricas. Así hablaremos de ascensión recta heliocéntrica o ascensión recta geocéntrica. Suelen expresarse en coordenadas geocéntricas la Luna y todos los satélites artificiales que tienen su órbita alrededor de la Tierra. Los planetas, asteroides y cometas que giran en torno al Sol, incluida la Tierra suelen expresar su posición en coordenadas heliocéntricas, pero como se ve en ese apartado, acaban siendo observador desde la Tierra por lo que hay que transformar las coordenadas heliocéntricas en geocéntricas. En las coordenadas geocéntricas el plano de referencia suele ser el Ecuador terrestre pero también se utiliza la eclíptica. Los satélites artificiales que en general giran próximos a la Tierra sufren la falta de uniformidad de la gravedad terrestre, y ello se traduce en que sus elementos orbitales cambian con gran celeridad por lo que es necesario disponer de elementos recientes, si queremos calcular la posición con un mínimo de exactitud. Además el roce con la atmósfera causa una deceleración que se tabula en estos elementos de dos líneas. Para el caso de la Luna su órbita es muy complicada porque el Sol actúa con una fuerza no despreciable constituyendo un problema de los tres cuerpos. Tampoco se pueden no considerar las acciones de Venus, Júpiter y Saturno. Dada la complejidad del movimiento, los nodos de la Luna, no están fijos, sino que dan una vuelta en 18,6 años. El eje de la elipse lunar no está fijo y el apogeo y perigeo dan una vuelta completa en 8,85 años. La inclinación de la órbita varía entre 5º y 5º18’. Así que para calcular su longitud y latitud geocéntricas o su ascensión recta y declinación geocéntrica hay que considerar cientos de términos. (es)</li> <li style="display:none;">La distance géocentrique ou ECEF (acronyme pour earth-centered, earth-fixed) d'un corps céleste est la distance qui le sépare de la Terre, ou plus précisément du centre de celle-ci. (fr)</li> <li style="display:none;">Di dalam astronomi bola, geosentrik adalah cara memandang/mendefinisikan posisi benda-benda langit dengan Bumi sebagai pusatnya. Karena jarak objek-objek langit begitu sangat besar jika dibandingkan dengan ukuran Bumi, maka posisinya pada bola langit sering kali harus didefinisikan tidak lagi bergantung pada posisi pengamat di permukaan bumi, tetapi Bumi sendirilah yang menjadi pusatnya. Kebanyakan tata koordinat langit merupakan tata koordinat yang geosentrik. Hal ini dilakukan untuk kemudahan semata. Istilah geosentrik sering merujuk juga pada "Teori Geosentrik", yaitu sebuah model alam semesta di mana Bumi adalah pusatnya. (in)</li> <li style="display:none;">ECEF(Earth-Centered Earth-Fixed) 또는 지구중심고정좌표계는 지구의 중력 중심을 원점으로 하는 좌표계로, GPS에서 사용되는 좌표체계이다. (ko)</li> <li style="display:none;">ECEF, acronimo di Earth-Centered Earth-Fixed, è un sistema di coordinate cartesiane geocentrico. Il punto (0,0,0) denota il centro della terra (da cui il nome "Earth-Centered") ed il sistema ruota in maniera solidale con la Terra. Il piano X-Y è coincidente con il piano equatoriale con i rispettivi versori che puntano le direzioni di longitudine 0° e 90°; l'asse Z ortogonale a questo piano punta nella direzione del Polo Nord. Le coordinate X,Y,Z sono rappresentate in metri. (it)</li> <li style="display:none;">Геоцентрические координаты — астрономические сферические величины (долгота, широта), определяющие положение точки. Начало отсчета системы совпадает с центром масс Земли. Строго относится к Земле, как к небесному телу. Аналогичные системы применяются к другим небесным телам и имеют собственные наименования — Селеноцентрическая (не стоит путать с селенографическими координатами, Гелиоцентрическая (не стоит путать с Барицентрическими координатами) и прочие. Ось Z — проходящая через точки Зенит и Надир — задает направление на север, для северного полушария. Ось Х — лежит в плоскости Экватора, задает направление на Нулевой меридиан (осевой меридиан зоны в проекции Гаусса — Крюгера). Ось Y — лежит в плоскости Экватора и дополняет систему до правой. Применяется в качестве базовой, для построения моделей орбит спутников, несмотря на приближённый её характер, широко распространена в Астроинерциальной навигации. (ru)</li> <li style="display:none;">Geocentriskt kartesiskt koordinatsystem är ett tredimensionellt ortonormerat koordinatsystem ungefärligt orienterat med origo i jordens tyngdpunkt, z-axeln parallell med jordens rotationsaxel, x-axeln genom Greenwichmeridianen och y-axeln vinkelrät mot dessa så att ett s.k. högersystem bildas. WGS 84 är ett exempel på ett geodetiskt datum som använder ett geocentriskt kartesiskt koordinatsystem. 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class="uri" rel="dbo:wikiPageWikiLink" resource="http://dbpedia.org/resource/Geodetic_system" href="http://dbpedia.org/resource/Geodetic_system">dbr:Geodetic_system</a></li> <li><a class="uri" rel="dbo:wikiPageWikiLink" resource="http://dbpedia.org/resource/File:Ecef_coordinates.svg" href="http://dbpedia.org/resource/File:Ecef_coordinates.svg">dbr:File:Ecef_coordinates.svg</a></li> <li><a class="uri" rel="dbo:wikiPageWikiLink" resource="http://dbpedia.org/resource/International_reference_pole" href="http://dbpedia.org/resource/International_reference_pole">dbr:International_reference_pole</a></li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://dbpedia.org/property/align">dbp:align</a> </td><td class="col-10 text-break"><ul> <li>left (en)</li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/property/caption">dbp:caption</a> </td><td class="col-10 text-break"><ul> <li>Polar view, Earth-centered inertial (en)</li> <li>Polar view, Earth-centered, Earth fixed (en)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://dbpedia.org/property/direction">dbp:direction</a> </td><td class="col-10 text-break"><ul> <li>horizontal (en)</li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/property/footer">dbp:footer</a> </td><td class="col-10 text-break"><ul> <li> (en)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://dbpedia.org/property/header">dbp:header</a> </td><td class="col-10 text-break"><ul> <li>An example of Earth-centered frame (en)</li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/property/image">dbp:image</a> </td><td class="col-10 text-break"><ul> <li>Animation of IRNSS orbit - Earth fixed - polar view.gif (en)</li> <li>Animation of IRNSS orbit around Earth - Polar view.gif (en)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" 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class="col-10 text-break"><ul> <li><a class="uri" rel="dcterms:subject" resource="http://dbpedia.org/resource/Category:Global_Positioning_System" prefix="dcterms: http://purl.org/dc/terms/" href="http://dbpedia.org/resource/Category:Global_Positioning_System">dbc:Global_Positioning_System</a></li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://www.w3.org/2000/01/rdf-schema#comment">rdfs:comment</a> </td><td class="col-10 text-break"><ul> <li style="display:none;">La distance géocentrique ou ECEF (acronyme pour earth-centered, earth-fixed) d'un corps céleste est la distance qui le sépare de la Terre, ou plus précisément du centre de celle-ci. (fr)</li> <li style="display:none;">ECEF(Earth-Centered Earth-Fixed) 또는 지구중심고정좌표계는 지구의 중력 중심을 원점으로 하는 좌표계로, GPS에서 사용되는 좌표체계이다. (ko)</li> <li style="display:none;">ECEF, acronimo di Earth-Centered Earth-Fixed, è un sistema di coordinate cartesiane geocentrico. Il punto (0,0,0) denota il centro della terra (da cui il nome "Earth-Centered") ed il sistema ruota in maniera solidale con la Terra. Il piano X-Y è coincidente con il piano equatoriale con i rispettivi versori che puntano le direzioni di longitudine 0° e 90°; l'asse Z ortogonale a questo piano punta nella direzione del Polo Nord. Le coordinate X,Y,Z sono rappresentate in metri. (it)</li> <li style="display:none;">Geocentriskt kartesiskt koordinatsystem är ett tredimensionellt ortonormerat koordinatsystem ungefärligt orienterat med origo i jordens tyngdpunkt, z-axeln parallell med jordens rotationsaxel, x-axeln genom Greenwichmeridianen och y-axeln vinkelrät mot dessa så att ett s.k. högersystem bildas. WGS 84 är ett exempel på ett geodetiskt datum som använder ett geocentriskt kartesiskt koordinatsystem. (sv)</li> <li style="display:none;">地心地固坐标系（Earth-Centered, Earth-Fixed，简称ECEF）简称地心坐标系，是一种以地心为原点的地固坐标系(也称地球坐标系)，也是屬於笛卡儿坐标系的一種。原点 O (0,0,0)为地球质心，z 轴与地轴平行指向北极点，x 轴指向本初子午线与赤道的交点，y 轴垂直于xOz平面(即东经90度与赤道的交点)构成右手坐标系。 (zh)</li> <li style="display:none;">Les coordenades geocèntriques tenen el seu origen en el centre de la Terra i poden ser coordenades cartesianes, coordenades eclíptiques o coordenades equatorials. Per distingir de les que tenen l'origen en el Sol s'afegeix la paraula heliocèntriques o geocèntriques. Així parlarem d'ascensió recta heliocèntrica o ascensió recta geocèntrica. Solen expressar-se en coordenades geocèntriques la Lluna i tots els satèl·lits artificials que tenen la seva òrbita al voltant de la Terra. Els planetes, asteroides i cometes que giren al voltant del Sol, inclosa la Terra solen expressar la seva posició en coordenades heliocèntriques, però com es veu en aquest apartat, acaben sent observador des de la Terra per la qual cosa cal transformar les coordenades heliocèntriques a geocèntriques. En les coordena (ca)</li> <li style="display:none;">ECEF (zkratka anglického Earth-Centered, Earth-Fixed), případně také ECR (Earth Centered Rotational) je kartézský souřadnicový systém, sloužící k vyjádření polohy těles vůči Zemi. Střed této souřadnicové soustavy leží v hmotnostním těžišti Země. Zemský povrch se vůči ní prakticky nepohybuje, proto se používá v geodetických a navigačních aplikacích. Umožňuje popis polohy v prostoru bez nutnosti definovat konkrétní referenční elipsoid. Toho využívají ve svých výpočtech. (cs)</li> <li>The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass. Its most common use is in tracking the orbits of satellites and in satellite navigation systems for measuring locations on the surface of the Earth, but it is also used in applications such as tracking crustal motion. (en)</li> <li style="display:none;">Las coordenadas geocéntricas tienen su origen en el centro de la Tierra y pueden ser coordenadas cartesianas, coordenadas eclípticas o coordenadas ecuatoriales. Para distinguir de las coordenadas heliocéntricas que tienen su origen en el Sol se añade la palabra heliocéntricas o geocéntricas. Así hablaremos de ascensión recta heliocéntrica o ascensión recta geocéntrica. Suelen expresarse en coordenadas geocéntricas la Luna y todos los satélites artificiales que tienen su órbita alrededor de la Tierra. (es)</li> <li style="display:none;">Das geozentrische Koordinatensystem ist ein dreidimensionales rechtwinkliges kartesisches Koordinatensystem mit den Koordinaten X, Y und Z. Sein Koordinatenursprung (0,0,0) liegt im Massenmittelpunkt des jeweils als Modell der Erde gewählten Referenzellipsoids. Die Koordinatenachsen bilden ein Rechtssystem, das sich mit der Erde dreht. So bleibt in ihm der Abstand eines Punktes von einem bestimmten Ort auf der Erdoberfläche immer gleich. (de)</li> <li style="display:none;">Di dalam astronomi bola, geosentrik adalah cara memandang/mendefinisikan posisi benda-benda langit dengan Bumi sebagai pusatnya. Karena jarak objek-objek langit begitu sangat besar jika dibandingkan dengan ukuran Bumi, maka posisinya pada bola langit sering kali harus didefinisikan tidak lagi bergantung pada posisi pengamat di permukaan bumi, tetapi Bumi sendirilah yang menjadi pusatnya. Kebanyakan tata koordinat langit merupakan tata koordinat yang geosentrik. Hal ini dilakukan untuk kemudahan semata. (in)</li> <li style="display:none;">Геоцентрические координаты — астрономические сферические величины (долгота, широта), определяющие положение точки. Начало отсчета системы совпадает с центром масс Земли. Строго относится к Земле, как к небесному телу. Аналогичные системы применяются к другим небесным телам и имеют собственные наименования — Селеноцентрическая (не стоит путать с селенографическими координатами, Гелиоцентрическая (не стоит путать с Барицентрическими координатами) и прочие. Ось Z — проходящая через точки Зенит и Надир — задает направление на север, для северного полушария. Ось Х — лежит в плоскости Экватора, задает направление на Нулевой меридиан (осевой меридиан зоны в проекции Гаусса — Крюгера). Ось Y — лежит в плоскости Экватора и дополняет систему до правой. (ru)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://www.w3.org/2000/01/rdf-schema#label">rdfs:label</a> </td><td class="col-10 text-break"><ul> <li style="display:none;">Coordenades geocèntriques (ca)</li> <li style="display:none;">ECEF (cs)</li> <li style="display:none;">Geozentrisches Koordinatensystem (de)</li> <li style="display:none;">Coordenadas geocéntricas (es)</li> <li>Earth-centered, Earth-fixed coordinate system (en)</li> <li style="display:none;">Geosentrik (in)</li> <li style="display:none;">ECEF (it)</li> <li style="display:none;">Distance géocentrique (fr)</li> <li style="display:none;">ECEF (ko)</li> <li style="display:none;">Geocentriskt kartesiskt koordinatsystem (sv)</li> <li style="display:none;">Геоцентрические координаты (ru)</li> <li style="display:none;">地心地固坐标系 (zh)</li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://www.w3.org/2002/07/owl#sameAs">owl:sameAs</a> </td><td class="col-10 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