Comparison of CPO and FCN empirical models

TL;DR

This paper compares various empirical models of celestial pole offset and free core nutation, analyzing their data representation, parameter variation, and prediction accuracy to provide practical recommendations.

Contribution

It introduces a comparative analysis of existing empirical models of CPO and FCN, highlighting their differences and suggesting improvements.

Findings

Models differ in data representation and parameter variation

Prediction accuracy varies among models

Practical recommendations for model selection are provided

Abstract

In this presentation, several publicly available empiric models of the celestial pole offset (CPO) and free core nutation (FCN), included those developed by the author, are investigated and compared each other from different points of view, such as representation of the observation data, FCN parameters variation, prediction accuracy. Based on this study, some practical recommendations are proposed.