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44 relations: Analemma, Argument of periapsis, Celestial sphere, Earth observation satellite, Envisat, Equation of time, Equatorial bulge, European Organisation for the Exploitation of Meteorological Satellites, European Remote-Sensing Satellite, European Space Agency, Flattening, Frozen orbit, Geopotential model, Geostationary orbit, Geosynchronous orbit, Hinode, Hour, Illumination angle, Infrared, List of orbits, Mars, MetOp, Minute, Nodal precession, Orbital eccentricity, Orbital perturbation analysis, Osculating orbit, Polar orbit, Precession, PROBA-2, Radian, Reconnaissance satellite, Retrograde and prograde motion, Satellite, Semi-major and semi-minor axes, Sidereal year, Solar time, Spheroid, Standard gravitational parameter, Sun, TRACE, Venus, World Geodetic System, Yohkoh.
Analemma
In astronomy, an analemma (from Greek ἀνάλημμα analēmma "support") is a diagram showing the variation of the position of the Sun in the sky over the course of a year, as viewed at a fixed time of day and from a fixed location on the Earth.
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Argument of periapsis
The argument of periapsis (also called argument of perifocus or argument of pericenter), symbolized as ω, is one of the orbital elements of an orbiting body.
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Celestial sphere
In astronomy and navigation, the celestial sphere is an abstract sphere with an arbitrarily large radius concentric to Earth.
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Earth observation satellite
Earth observation satellites are satellites specifically designed for Earth observation from orbit, similar to spy satellites but intended for non-military uses such as environmental monitoring, meteorology, map making etc.
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Envisat
Envisat ("Environmental Satellite") is a large inactive Earth-observing satellite which is still in orbit.
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Equation of time
The equation of time describes the discrepancy between two kinds of solar time.
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Equatorial bulge
An equatorial bulge is a difference between the equatorial and polar diameters of a planet, due to the force exerted by its rotation.
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European Organisation for the Exploitation of Meteorological Satellites
The European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) is an intergovernmental organisation created through an international convention agreed by a current total of 30 European Member States: Austria, Belgium, Bulgaria, Croatia, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Iceland, Italy, Latvia, Lithuania, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, and the United Kingdom.
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European Remote-Sensing Satellite
European remote sensing satellite (ERS) was the European Space Agency's first Earth-observing satellite programme using a polar orbit.
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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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Flattening
Flattening is a measure of the compression of a circle or sphere along a diameter to form an ellipse or an ellipsoid of revolution (spheroid) respectively.
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Frozen orbit
In orbital mechanics, a frozen orbit is an orbit for an artificial satellite in which natural drifting due to the central body's shape has been minimized by careful selection of the orbital parameters.
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Geopotential model
In geophysics, a geopotential model is the theoretical analysis of measuring and calculating the effects of Earth's gravitational field.
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Geostationary orbit
A geostationary orbit, often referred to as a geosynchronous equatorial orbit (GEO), is a circular geosynchronous orbit above Earth's equator and following the direction of Earth's rotation.
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Geosynchronous orbit
A geosynchronous orbit (sometimes abbreviated GSO) is an orbit around Earth of a satellite with an orbital period that matches Earth's rotation on its axis, which takes one sidereal day (23 hours, 56 minutes, and 4 seconds).
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Hinode
Hinode (ひので,, Sunrise), formerly Solar-B, is a Japan Aerospace Exploration Agency Solar mission with United States and United Kingdom collaboration.
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Hour
An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.
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Illumination angle
In computer graphics and geography, the illumination angle of a surface with a light source (such as the Earth's surface and the Sun) is the angle between the inward surface normal and the direction of light.
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Infrared
Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.
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List of orbits
The following is a list of types of orbits.
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Mars
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
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MetOp
MetOp is a series of three polar orbiting meteorological satellites developed by the European Space Agency (ESA) and operated by the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT).
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Minute
The minute is a unit of time or angle.
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Nodal precession
Nodal precession is the precession of the orbital plane of a satellite around the rotation axis of an astronomical body such as Earth.
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Orbital eccentricity
The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle.
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Orbital perturbation analysis
Orbital perturbation analysis is the activity of determining why a satellite's orbit differs from the mathematical ideal orbit.
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Osculating orbit
In astronomy, and in particular in astrodynamics, the osculating orbit of an object in space at a given moment in time is the gravitational Kepler orbit (i.e. ellipse or other conic) that it would have about its central body if perturbations were not present.
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Polar orbit
A polar orbit is one in which a satellite passes above or nearly above both poles of the body being orbited (usually a planet such as the Earth, but possibly another body such as the Moon or Sun) on each revolution.
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Precession
Precession is a change in the orientation of the rotational axis of a rotating body.
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PROBA-2
PROBA-2 is the second satellite in the European Space Agency's series of PROBA low-cost satellites that are being used to validate new spacecraft technologies while also carrying scientific instruments.
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Radian
The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.
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Reconnaissance satellite
A reconnaissance satellite (commonly, although unofficially, referred to as a spy satellite) is an Earth observation satellite or communications satellite deployed for military or intelligence applications.
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Retrograde and prograde motion
Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is the central object (right figure).
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Satellite
In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit.
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Semi-major and semi-minor axes
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.
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Sidereal year
A sidereal year (from Latin sidus "asterism, star") is the time taken by the Earth to orbit the Sun once with respect to the fixed stars.
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Solar time
Solar time is a calculation of the passage of time based on the position of the Sun in the sky.
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Spheroid
A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.
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Standard gravitational parameter
In celestial mechanics, the standard gravitational parameter μ of a celestial body is the product of the gravitational constant G and the mass M of the body.
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Sun
The Sun is the star at the center of the Solar System.
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TRACE
Transition Region and Coronal Explorer (TRACE) was a NASA heliophysics and solar observatory designed to investigate the connections between fine-scale magnetic fields and the associated plasma structures on the Sun by providing high resolution images and observation of the solar photosphere, the transition region, and the corona.
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Venus
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.
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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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Yohkoh
Yohkoh (ようこう, Sunbeam in Japanese), known before launch as Solar-A, was a Solar observatory spacecraft of the Institute of Space and Astronautical Science (Japan), in collaboration with space agencies in the United States and the United Kingdom. It was launched into Earth orbit on August 30, 1991 by the M-3S-5 rocket from Kagoshima Space Center. It took its first soft X-ray image on September 13, 1991 21:53:40, and movie representations of the X-ray corona over 1991-2001 are available at the.
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Redirects here:
Dawn-dusk orbit, Dawn/dusk orbit, Heliostationary orbit, Heliosynchronous, Heliosynchronous orbit, Noon-midnight orbit, Noon/midnight orbit, Polar Sun Synchronous Orbit, Polar Sun synchronous orbit, Polar sun synchronous orbit, Sun Synchronous orbit, Sun synchronous, Sun synchronous orbit, Sun-Synchronous Orbit, Sun-synchronous, Sun-synchronous orbits.
References
[1] https://en.wikipedia.org/wiki/Sun-synchronous_orbit
