class=”glossary”>Poseidon data resolution?
Spatially, along the track, data are available every 7 km (measurements averaged on 1 second, or “1 Hz data”). Available GDR data.’), ”)” class=”glossary”>GDR 10 or 20 Hz data also exists (depending on the satellite), but those are more noisy. Between tracks, for Jason-1&2 and Topex/Poseidon, the distance is up to 315 km at the Equator; for ERS and Envisat, it is about 80 km. Gridded Aviso data are available at 1/3° on a Mercator grid.
