Table of Contents
34 relations: Astrometry, Astronomical coordinate systems, Astronomical object, Astronomical radio source, Astronomy, Barycenter (astronomy), Barycentric and geocentric celestial reference systems, Catalogues of Fundamental Stars, Earth orientation parameters, Epoch (astronomy), Equatorial coordinate system, Extragalactic astronomy, Frame of reference, Gaia (spacecraft), General relativity, Gravity, Hipparcos, Inertial frame of reference, International Astronomical Union, International Earth Rotation and Reference Systems Service, International Terrestrial Reference System and Frame, Ionosphere, K band (IEEE), Ka band, Mean squared error, Minute and second of arc, Noise floor, Quasar, Rotation, S band, Solar System, United States Naval Observatory, Very-long-baseline interferometry, X band.
- Frames of reference
Astrometry
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.
See International Celestial Reference System and its realizations and Astrometry
Astronomical coordinate systems
In astronomy, coordinate systems are used for specifying positions of celestial objects (satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e.g. the true horizon and north to an observer on Earth's surface). International Celestial Reference System and its realizations and Astronomical coordinate systems are frames of reference.
See International Celestial Reference System and its realizations and Astronomical coordinate systems
Astronomical object
An astronomical object, celestial object, stellar object or heavenly body is a naturally occurring physical entity, association, or structure that exists within the observable universe.
See International Celestial Reference System and its realizations and Astronomical object
Astronomical radio source
An astronomical radio source is an object in outer space that emits strong radio waves.
See International Celestial Reference System and its realizations and Astronomical radio source
Astronomy
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos.
See International Celestial Reference System and its realizations and Astronomy
Barycenter (astronomy)
In astronomy, the barycenter (or barycentre) is the center of mass of two or more bodies that orbit one another and is the point about which the bodies orbit. International Celestial Reference System and its realizations and barycenter (astronomy) are astronomical coordinate systems.
See International Celestial Reference System and its realizations and Barycenter (astronomy)
Barycentric and geocentric celestial reference systems
The barycentric celestial reference system (BCRS) is a coordinate system used in astrometry to specify the location and motions of astronomical objects. International Celestial Reference System and its realizations and barycentric and geocentric celestial reference systems are astrometry and astronomical coordinate systems.
Catalogues of Fundamental Stars
The Catalogue of Fundamental Stars is a series of six astrometric catalogues of high precision positional data for a small selection of stars to define a celestial reference frame, which is a standard coordinate system for measuring positions of stars.
See International Celestial Reference System and its realizations and Catalogues of Fundamental Stars
Earth orientation parameters
In geodesy and astrometry, earth orientation parameters (EOP) describe irregularities in the rotation of planet Earth. International Celestial Reference System and its realizations and earth orientation parameters are astrometry.
See International Celestial Reference System and its realizations and Earth orientation parameters
Epoch (astronomy)
In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity.
See International Celestial Reference System and its realizations and Epoch (astronomy)
Equatorial coordinate system
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects. International Celestial Reference System and its realizations and equatorial coordinate system are astronomical coordinate systems.
See International Celestial Reference System and its realizations and Equatorial coordinate system
Extragalactic astronomy
Extragalactic astronomy is the branch of astronomy concerned with objects outside the Milky Way galaxy.
See International Celestial Reference System and its realizations and Extragalactic astronomy
Frame of reference
In physics and astronomy, a frame of reference (or reference frame) is an abstract coordinate system whose origin, orientation, and scale are specified by a set of reference points―geometric points whose position is identified both mathematically (with numerical coordinate values) and physically (signaled by conventional markers). International Celestial Reference System and its realizations and frame of reference are frames of reference.
See International Celestial Reference System and its realizations and Frame of reference
Gaia (spacecraft)
Gaia is a space observatory of the European Space Agency (ESA), launched in 2013 and expected to operate until 2025.
See International Celestial Reference System and its realizations and Gaia (spacecraft)
General relativity
General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics.
See International Celestial Reference System and its realizations and General relativity
Gravity
In physics, gravity is a fundamental interaction which causes mutual attraction between all things that have mass.
See International Celestial Reference System and its realizations and Gravity
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
See International Celestial Reference System and its realizations and Hipparcos
Inertial frame of reference
In classical physics and special relativity, an inertial frame of reference (also called inertial space, or Galilean reference frame) is a stationary or uniformly moving frame of reference. International Celestial Reference System and its realizations and inertial frame of reference are frames of reference.
See International Celestial Reference System and its realizations and Inertial frame of reference
International Astronomical Union
The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation.
See International Celestial Reference System and its realizations and International Astronomical Union
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.
International Terrestrial Reference System and Frame
The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earth's surface.
Ionosphere
The ionosphere is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere.
See International Celestial Reference System and its realizations and Ionosphere
K band (IEEE)
The IEEE K-band is a portion of the radio spectrum in the microwave range of frequencies from 18 to 27 gigahertz (GHz).
See International Celestial Reference System and its realizations and K band (IEEE)
Ka band
The Ka band (pronounced as either "kay-ay band" or "ka band") is a portion of the microwave part of the electromagnetic spectrum defined as frequencies in the range 26.5–40 gigahertz (GHz), i.e. wavelengths from slightly over one centimeter down to 7.5 millimeters.
See International Celestial Reference System and its realizations and Ka band
Mean squared error
In statistics, the mean squared error (MSE) or mean squared deviation (MSD) of an estimator (of a procedure for estimating an unobserved quantity) measures the average of the squares of the errors—that is, the average squared difference between the estimated values and the actual value.
See International Celestial Reference System and its realizations and Mean squared error
Minute and second of arc
A minute of arc, arcminute (arcmin), arc minute, or minute arc, denoted by the symbol, is a unit of angular measurement equal to of one degree.
See International Celestial Reference System and its realizations and Minute and second of arc
Noise floor
In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system, where noise is defined as any signal other than the one being monitored.
See International Celestial Reference System and its realizations and Noise floor
Quasar
A quasar is an extremely luminous active galactic nucleus (AGN).
See International Celestial Reference System and its realizations and Quasar
Rotation
Rotation or rotational motion is the circular movement of an object around a central line, known as axis of rotation.
See International Celestial Reference System and its realizations and Rotation
S band
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).
See International Celestial Reference System and its realizations and S band
Solar System
The Solar SystemCapitalization of the name varies.
See International Celestial Reference System and its realizations and Solar System
United States Naval Observatory
The United States Naval Observatory (USNO) is a scientific and military facility that produces geopositioning, navigation and timekeeping data for the United States Navy and the United States Department of Defense. International Celestial Reference System and its realizations and United States Naval Observatory are astrometry.
See International Celestial Reference System and its realizations and United States Naval Observatory
Very-long-baseline interferometry
Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy.
See International Celestial Reference System and its realizations and Very-long-baseline interferometry
X band
The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum.
See International Celestial Reference System and its realizations and X band
See also
Frames of reference
- Astronomical coordinate systems
- Breit frame
- Center-of-momentum frame
- Frame fields in general relativity
- Frame of reference
- Frame-dragging
- Geodetic datums
- Inertial frame of reference
- International Celestial Reference System and its realizations
- Local reference frame
- Moving frame
- Non-inertial reference frame
- Preferred frame
- Proper frame
- Proper reference frame (flat spacetime)
- Rest frame
- Rod and frame test
- Rotating reference frame
- Synchronous frame
- Terrestrial reference frame
References
Also known as Gaia Celestial Reference Frame, International Celestial Reference Frame, International Celestial Reference System, International Celestial Reference System and Frame.