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ITRF2014 is the new realization of the International Terrestrial Reference System. Following the procedure already used for the ITRF2005 and ITRF2008 formation, the ITRF2014 uses as input data time series of station positions and Earth Orientation Parameters (EOPs) provided by the Technique Centers of the four space geodetic techniques (VLBI, SLR, GNSS and DORIS). Based on completely reprocessed solutions of the four techniques, the ITRF2014 is expected to be an improved solution compared to ITF2008.

Two innovations were introduced in the ITRF2014 processing, namely:

  • Annual and semi-annual terms were estimated for stations with sufficient time-spans of the 4 techniques during the stacking processes of the corresponding time series;
  • Post-Seismic Deformation (PSD) models were determined by fitting GNSS/GPS data at major GNSS/GPS Earthquake sites. The PSD models were then applied to the 3 other techniques at EQ Co-location sites.

While the ITRF2014 solution provides the usual/classical estimates: station positions at a given epoch (2010.0), station velocities and EOPs, the PSD models are part of the ITRF2014 products. Read more...

Input data used for ITRF2014
  • Space geodesy solutions from 4 space geodesy techniques. Description
Computation strategy (description, discontinuities etc...)

Scale and Geocenter time series

 Detrended PlotsPlots with respect to ITRF2014
VLBI PlotTime Series   PlotTime Series  
SLR PlotTime Series PlotTime Series
DORIS PlotTime Series PlotTime Series

Station position residuals

Online residuals plots.

ITRF2014 files

ITRF2014 velocity field
Figure 1: ITRF2014 velocity field


The IERS ITRS Product Center is indebted to the Technique Services (IDS, ILRS, IGS and IVS) and their Analysis and Combination Centers for their contribution by providing reprocessed solutions. The quality of the ITRF2014 is certainly benefiting from technique improved solutions. Many institutions and individuals have also contributed to the ITRF2014 project. We also acknowledge the contribution of DGFI and JPL colleagues to the ITRF2014 analysis. The IERS ITRS Product Center is particularly grateful to all the institutions that provide the necessary investment for the space geodetic observatories which constitute the main ITRF foundation.

Citation: Altamimi, Z., P. Rebischung, L. Metivier, and X. Collilieux (2016), ITRF2014: A new release of the International Terrestrial Reference Frame modeling nonlinear station motions, J. Geophys. Res. Solid Earth, 121, doi:10.1002/2016JB013098.

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