EOT20: a global ocean tide model from multi-mission satellite altimetry

Abstract. EOT20 is the latest in a series of empirical ocean tide (EOT) models derived using residual tidal analysis multi-mission satellite altimetry at DGFI-TUM. The amplitudes and phases 17 constituents are provided on global 0.125? grid based seven missions four extended missions. model shows significant improvements compared to previous iteration (EOT11a) throughout ocean, particularly coastal shelf regions, due inclusion more recent data as well missions, use updated FES2014 reference estimated signals, ALES retracker improved representation. In validation gauges bottom pressure data, these EOT11a highlighted with root sum square (RSS) eight major improving by ? 1.4 cm for entire improvement RSS (? 2.2 cm) occurring region. Concerning other models, an 0.2 closest (FES2014) ocean. Variance reduction was conducted comparing results Jason-2, Jason-3 SARAL From this analysis, showed variance all three biggest These improvements, region, provide encouragement correction sea-level research. All load from can be freely accessed https://doi.org/10.17882/79489 (Hart-Davis et al., 2021). TICON dataset used model, available https://doi.org/10.1594/PANGAEA.896587 (Piccioni 2018a).