In situ global statistics

One of the possible comparison is of altimetry data with measurements of in situ networks. Several such networks exists over the ocean, like the tide gauges, Argo... They provide a more or less global coverage during several years, and are completely independent from altimeters, which make the comparison interesting.

<a href="javascript:openGlossaryPopup (encodeURIComponent('Ocean tides can now be gauged to within 2 cm, thanks largely to altimetry. This has helped to improve our understanding of Earth-Moon interactions, such as the Moons impact on the length of the day on Earth. '), '')" class="glossary"><dfn>Tide</dfn></a> Gauge network

Tide gauge network used for altimetry validation (CLS). Click on each icon to access to each tige gauge fact sheet.
Credits CLS/Cnes/UHSLC/SONEL