The International Terrestrial Reference Frame (ITRF)

The International Terrestrial Reference Frame (ITRF) is a set of points with their 3-dimensional cartesian coordinates which realize an ideal reference system, the International Terrestrial Reference System (ITRS), as defined by the IUGG resolution No. 2 adopted in Vienna, 1991.

The ITRS Combination Centres provide also alternative realizations of the ITRF.

Contents

cartesian stations coordinates and velocities
Earth Orientation Parameters (ITRF2008 only)
site catalogue
DOMES identification numbers (see "Documentation")
local ties (see "Documentation")
realizations: ITRF89, ITRF90, ITRF91, ITRF92, ITRF93, ITRF94, ITRF96, ITRF97, ITRF2000, ITRF2005, ITRF2008, ITRF2014, ITRF2020, ITRF2020-u2023

Accuracy

Uncertainties are given in the solutions.

Updates

From one to several years.

Public access

https://itrf.ign.fr/en/solutions
or
https://datacenter.iers.org/products/reference-systems/terrestrial/itrf/

ITRF92	ITRF92
ITRF93	ITRF93
ITRF94	ITRF94
ITRF96	ITRF96
ITRF97	ITRF97
ITRF2000	ITRF2000
ITRF2005	ITRF2005
ITRF2008	ITRF2008
ITRF2014	ITRF2014
ITRF2020	ITRF2020
ITRF2020-u2023	ITRF2020-u2023

Format

ITRF92-ITRF2000	simple tables
ITRF94-ITRF2020	SINEX-Format

Documentation

ITRF homepage

ITRF89	IERS Technical Note No. 6
ITRF90	IERS Technical Note No. 9
ITRF91	IERS Technical Note No. 12
ITRF92	IERS Technical Note No. 15
ITRF93	IERS Technical Note No. 18
ITRF94	IERS Technical Note No. 20
ITRF96	IERS Technical Note No. 24
ITRF97	IERS Technical Note No. 27
ITRF2000	IERS Technical Note No. 31
ITRF2005	Z. Altamimi, X. Collilieux, J. Legrand, B. Garayt, C. Boucher: ITRF2005: A new release of the International Terrestrial Reference Frame based on time series of station positions and Earth Orientation Parameters, Journal of geophysical research, 2007, DOI: 10.1029/2007JB004949
ITRF2008	Z. Altamimi, X. Collilieux, L. Métivier: ITRF2008: an improved solution of the international terrestrial reference frame, Journal of geodesy, 2011, DOI: 10.1007/s00190-011-0444-4 IERS Technical Note No. 37
ITRF2014	Z. Altamimi, P. Rebischung, L. Métivier, X. Collilieux: ITRF2014: A new release of the International Terrestrial Reference Frame modeling nonlinear station motions, Journal of Geophysical Research: Solid Earth, 2017, DOI: 10.1002/2016JB013098 IERS Technical Note No. 38
ITRF2020	Z. Altamimi, P. Rebischung, X. Collilieux, L. Métivier, K. Chanard: ITRF2020: an augmented reference frame refining the modeling of nonlinear station motions, Journal of Geodesy, 2023, DOI:10.1007/s00190-023-01738-w IERS Technical Note No. 41
IERS Network	The DOMES Numbering System
	DOMES number request
	Site information and selection
	Map of ITRF2014 network Map of ITRF2020 network
Recommendations and Standards	IAU and IUGG/IAG recommendations on reference systems IERS Conventions