Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system...

WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM)...

Earth-centered inertial (ECI) coordinate frames have their origins at the center of mass of Earth and are fixed with respect to the stars. "I" in "ECI"...

small oscillation of the Earth's axis, nutation. In order to reference a coordinate system which can be considered as fixed in space, these motions require...

location, on the Earth's surface, in contrast to a geocentric celestial system. The horizontal coordinate system is fixed to a location on Earth, not the stars...

meridian). Geocentric coordinate system (or Earth-centered Earth-fixed) A three-dimensional cartesian coordinate system that models the Earth as a three-dimensional...

intersects the launch site. Earth-centered inertial coordinate system ECEF, Earth-Centered Earth-fixed coordinate system Invariable plane, a weighted...

2010 date). Earth-centered, Earth-fixed coordinate system Earth orientation parameters Geodetic datum International Celestial Reference System and its realizations...

convention".) Once the radius is fixed, the three coordinates (r, θ, φ), known as a 3-tuple, provide a coordinate system on a sphere, typically called the...

Aristotelian physics Earth-centered, Earth-fixed coordinate system History of the center of the Universe Hollow Earth § Concave Hollow Earths Religious cosmology...

geographic, geodetic, and the geocentric coordinate systems for planets other than Earth. Similar coordinate systems are defined for other solid celestial...

positions on Earth, the ellipsoid is a reference ellipsoid and the vector is decomposed in an Earth-centered Earth-fixed coordinate system. It behaves...

surface gravity is about one sixth of Earth's, about half of that of Mars, and the second highest among all Solar System moons, after Jupiter's moon Io. The...

the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust. The...

for Galilean coordinate system which is a hypothetical system relative to which fixed stars remain fixed. References for this section: Fixed stars can be...

identification. Equatorial bulge Earth radius of curvature Geodetic datum Great ellipse Meridian arc Normal gravity Planetary coordinate system History of geodesy Planetary...

ellipsoid. The vector is decomposed in an Earth centered earth fixed coordinate system. It behaves the same at all Earth positions, and it holds the mathematical...

to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or...

The European Terrestrial Reference System 1989 (ETRS89) is an ECEF (Earth-Centered, Earth-Fixed) geodetic Cartesian reference frame, in which the Eurasian...

than observation. He established the idea of a sphere of fixed stars that rotated about Earth. This was accepted by most of those who came after, in particular...

geographic coordinate systems is made necessary by the different geographic coordinate systems in use across the world and over time. Coordinate conversion...

Atomic Time (TAI), which is a coordinate time scale tracking notional proper time on the rotating surface of the Earth (the geoid). In order to maintain...

meridian as seen from Earth. Longitude in this system is therefore fixed for observers on Earth. The Carrington heliographic coordinate system, established by...

In mathematics, the polar coordinate system is a two-dimensional coordinate system in which each point on a plane is determined by a distance from a reference...

In geometry, a coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine the position of the points or other...

we will restrict the local coordinate frame to ENU. The origin of this coordinate system is usually chosen to be a fixed point on the surface of the...

to an observer's ideal horizon. The equatorial coordinate system is centered at Earth's center, but fixed relative to the celestial poles and the March...

inclination of zero in the Earth-Centered, Earth-Fixed coordinate system (meaning the orbital plane is not tilted relative to the Earth's equator). The "ground...

semimajor axis. If the reference z axis of the coordinate system adopted is aligned along the Earth's symmetry axis, then only the longitude of the ascending...

Geodetic coordinates are a type of curvilinear orthogonal coordinate system used in geodesy based on a reference ellipsoid. They include geodetic latitude...