Denise Dettmering (DGFI-TUM, Germany); Mathis Bloßfeld (DGFI-TUM, Germany); Julian Zeitlhöfler (DGFI-TUM, Germany)

New (2020) realizations of the International Terrestrial Reference System (ITRS), namely ITRF2020, JTRF2020 and DTRF2020, have been published recently. We present some results of the evaluation of these realizations for precise orbit determination (POD) of the altimetry satellites TOPEX/Poseidon, Jason-1, Jason-2, and Jason-3 using SLR and DORIS observations. The impact on the root-mean-square and mean fits of observations, estimated parameters, as well as single-satellite sea surface height crossover differences, radial altimeter corrections, and geographically correlated mean errors will be presented. The results will be also compared with those obtained using previous (2014) realizations of ITRS.