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11 relations: European Space Agency, Frame of reference, Galileo (satellite navigation), Geocentric model, Geodetic datum, International Celestial Reference System, International Earth Rotation and Reference Systems Service, International System of Units, Observational error, Standard (metrology), World Geodetic System.
European Space Agency
The European Space Agency (ESA; Agence spatiale européenne, ASE; Europäische Weltraumorganisation) is an intergovernmental organisation of 22 member states dedicated to the exploration of space.
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Frame of reference
In physics, a frame of reference (or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix (locate and orient) the coordinate system and standardize measurements.
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Galileo (satellite navigation)
Galileo is the global navigation satellite system (GNSS) that is being created by the European Union (EU) through the European Space Agency (ESA), headquartered in Prague in the Czech Republic, with two ground operations centres, Oberpfaffenhofen near Munich in Germany and Fucino in Italy.
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Geocentric model
In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a superseded description of the universe with Earth at the center.
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Geodetic datum
A geodetic datum or geodetic system is a coordinate system, and a set of reference points, used to locate places on the Earth (or similar objects).
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International Celestial Reference System
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
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International Earth Rotation and Reference Systems Service
The International Earth Rotation and Reference Systems Service (IERS), formerly the International Earth Rotation Service, is the body responsible for maintaining global time and reference frame standards, notably through its Earth Orientation Parameter (EOP) and International Celestial Reference System (ICRS) groups.
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International System of Units
The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.
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Observational error
Observational error (or measurement error) is the difference between a measured value of a quantity and its true value.
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Standard (metrology)
In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity.
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World Geodetic System
The World Geodetic System (WGS) is a standard for use in cartography, geodesy, and satellite navigation including GPS.
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Redirects here:
GTRF, ITARF, ITRF, International Terrestrial Reference Frame, Itarf, Itrf.
References
[1] https://en.wikipedia.org/wiki/International_Terrestrial_Reference_System
