New tide gauges cross-calibration method : multi-instrument data combination

Our knowledge about the sea level variation along the world coasts mainly relies on both
measurements of sea surface height with respect to tide gauges and measurements of geocentric
vertical land motions using GNSS techniques. As GNSS based vertical land motions estimations
correct tide gauges based sea surfaces height measurements, highly precise and accurate datasets are
mandatory for developing researches using the final corrected sea surface heights.
The present goals of this thesis is to better assess and improve the precision and accuracy of
informations related to the estimation of sea level rise along coasts. We presently study tide-gauge
precision based on statistical analysis of multi−tide gauges experiments campaigns, looking for
unknown biases, and more generally, noises that could further limit sea surface height analysis
precision.
A significant progress in this domains could have an impact on conclusions of sea level studies
based on the mentioned measurements but also on studies in the fields of geophysics and geodesy
(especially by the contribution to the stability of reference systems).