Candidate Celestial Body Reference Frames

Creation date: 2019-02-13 20:34:25 Update date: 2019-02-14 15:41:18

Policy: Expert Review

Authority: CCSDS.MOIMS.NAV

OID: 1.3.112.4.57.2


Contents

36 records in registry

Object Identifier

Label

1.3.112.4.57.2
Celestial Body Reference Frames

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Details Status Keyword Value Name Description And Reference Nomenclature Others Have Referred To This As Frame Type References OID

Details

Provisional

ALIGN_CB

For all central bodies except Earth, where the central body shall be defined via an accompanying “CENTER_NAME”. An inertial frame obtained by evaluating the central body’s fixed (rotating) frame at some specified epoch, rather than evolving in time.

Inertial

1.3.112.4.57.2.1

Details

Provisional

ALIGN_EARTH

For the Earth system only, an inertial frame obtained by evaluating the Earth’s fixed (rotating) frame at some specified epoch, rather than evolving in time.

Inertial

1.3.112.4.57.2.2

Details

Provisional

B1950

For the Earth system only, these inertial axes are associated with the FK4 star catalog and its theory modeling the mean equator and mean equinox. The epoch is the beginning of the Besselian year 1950, corresponding to 31 Dec 1949 22:09:46.866 or JD 2433282.4234591. The B1950 axes are realized by a constant rotation offset from the J2000 axes, using a formula available from the Explanatory Supplement to the Astronomical Almanac.

Inertial

1.3.112.4.57.2.3

Details

Provisional

CIRS

Celestial Intermediate Reference System. Details in IERS TN32 5.11 and TN36 p. 47 and Vallado [Vallado, D., Seago, J., Seidelmann, P. (2006). Implementation Issues Surrounding the New IAU Reference Systems for Astrodynamics. 16th AAS/AIAA Space Flight Mechanics Conference]. Essentially the transformation for precession/nutation is based on the Celestial Intermediate Pole realized with the IAU2000A model rather than IAU1976/80.

Inertial

1.3.112.4.57.2.4

Details

Provisional

DTRFyyyy

The DTRFyyyy is the inertial realization of the ITRS computed at DGFI-TUM (Deutsches Geodätisches Forschungsinstitut/Technische Universität München). Only two other VLBI centers compute these realizations, the others being IGN in Paris and JPL in Pasadena. The DTRF considering corrections for non-tidal atmospheric and hydrological loading, as of year “yyyy” (e.g. 2000).

e.g., DTRF2000

Inertial

1.3.112.4.57.2.5

Details

Provisional

EFG

Earth-Fixed Greenwich (EFG) rotating frame. The EFG reference frame is defined as the Earth Fixed frame after polar motion is removed.

E, F, G, Edot, Fdot, Gdot

Pseudo-Earth Fixed

Body-Fixed

1.3.112.4.57.2.6

Details

Provisional

EME2000

The quasi-inertial frame Earth Mean Equator and Mean Equinox of the J2000 epoch (JD 2451545.0 TDB which is 1 Jan 2000 12:00:00.000 TDB). The J2000 frame is realized by the transformational algorithm (also known as the FK5 IAU76 theory) between it and the Earth Fixed frame. The algorithm uses the 1976 IAU Theory of Precession, the 1980 Nutation model, and the Greenwich Mean apparent Sidereal Time (expressed as a function of time in UT1), updated by IERS Technical Note No. 21 to include an adjustment to the equation of the equinoxes.

J2000

Inertial

1.3.112.4.57.2.7

Details

Provisional

FIXED_CB

The rotating fixed frame for all central bodies except Earth, where the central body shall be defined via an accompanying “CENTER_NAME”. The Fixed frame is the frame in which its topography is expressed. For gaseous planets (Jupiter, Saturn, Uranus, Neptune), the Fixed frame identifies the planet’s magnetic field instead. The Earth’s Moon realizes its Fixed frame (by default) as its Mean Earth frame; all other central bodies realize their Fixed frames using the transformational algorithm and parameters contained in Report of the IAU/IAG Working Group on cartographic coordinates and rotational elements: 2009, B.A. Archinal et al., Celest. Mech Dyn Astr 109 (2), 101-135 (DOI: 10.1007/s10569-010-9320-4).

Body-Fixed

1.3.112.4.57.2.8

Details

Provisional

GCRFn

The Geocentric Celestial Reference Frame is the realization of the Geocentric Celestial Reference System per IERS conventions 2003 (IERS Technical Note TN-32, ICRF1) by McCarthy and Petit and 2010 conventions (TN-36, ICRF2) by Petit and Luzum. The underlying ICRS, from which the GCRF is derived, is periodically reevaluated. As such, each realization of the GCRF must be annotated (i.e., GCRFn, where the "n" character is an integer starting from 1). The GCRF is the standard inertial coordinate system for the Earth, with origin at the geocenter (i.e Earth’s center of mass location). The GCRF is the geocentric counterpart of the ICRF.

e.g., GCRF2

Inertial

1.3.112.4.57.2.9

Details

Provisional

GTOD

The Greenwich True-of-Date (GTOD) rotating coordinate system. This is realized as a rotating, right-handed, Cartesian system with the origin at the center of the Earth. The orientation of this system is specified with the xy plane in the Earth’s true of date Equator, the z axis directed along the Earth’s true of date rotational axis and is positive north, the positive x axis directed toward the prime meridian, and the y axis completing the right-handed system.

• ‘True of Date Rotating’ (TDR)
• ‘Greenwich Rotating Coordinate Frame’ (GRC)

Body-Fixed

1.3.112.4.57.2.10