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

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"...

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

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...

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

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

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

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...

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...

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...

22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) including 1 billion people in more than...

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

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

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

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...

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

fixed for an observer on Earth, and, in Carrington coordinates, the longitude is fixed for the Sun's rotation. The Stonyhurst heliographic coordinate...

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...

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

3,474 km (2,159 mi), roughly one-quarter of Earth's (about as wide as Australia.) Within the Solar System, it is the largest and most massive satellite...

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...

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...

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...

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...

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...

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

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...

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...