Basic Earth Parameters from VLBI observations: an update

Understanding Earth's rotation is crucial for a wide range of applications, including positioning, satellite navigation, and remote sensing, as variations in Earth's rotational speed and orientation directly impact the accuracy of these technologies. Earth’s periodic orientation changes, known as nutations, are currently evaluated using a model adopted by the international community back in 2000. This work seeks to develop an updated nutation model by integrating the latest geophysical knowledge and refining computational methods. We build on the oceanic corrections computed by Yuting Cheng during her PhD, on the method for determining the updated Basic Earth Parameters (BEPs) from VLBI data developed in Koot et al. (2008), an Bayesian inversion updated in parameterization and sampling method, and on insights gained from the GRACEFUL Synergy ERC grant on core dynamics.