ITRF2020: main results and key performance indicators

More than 30 years of space geodetic data have been reprocessed
by the International Association of Geodesy technique services
and submitted to compute the new realization of the
International Terrestrial Reference System (ITRS). The new
realization, ITRF2020, is intended to replace ITRF2014. It is
provided in the form of an augmented reference frame so that in
addition to station positions and velocities, parametric
functions for both post-seismic deformation (PSD) and seasonal
signals (expressed in the Center of Mass frame derived from
Satellite Laser Ranging data) will also be delivered to the
users. The presentation summarizes the main results of ITRF2020
analysis and evaluates its internal consistency via some key
performance indicators. In particular, the paper discusses the
level of the scale agreement between the four techniques, its
linear and nonlinear time evolution, and the strategy adopted
for the ITRF2020 scale definition. In addition, we evaluate the
performance of the parametric functions for both seasonal
signals and PSD and the level of consistency between the four
techniques at colocation sites.