LEGOS Center for Topogaphic studies of the Ocean and Hydrosphere
Original (non-English) name
Acronym
CTOH
Citation
Abstract
The CTOH is a French Observation Service dedicated to satellite altimetry studies (Centre of Topography of the Oceans and the Hydrosphere). The CTOH aims to help scientific users develop new altimetric products and applications.
Within this framework, the CTOH maintains homogeneous altimetric databases for the long-term monitoring of sea level and ocean currents, lake and river levels, the cryosphère, and the planet's climate.
Scientific users can extract:
- along-track GDR data with up-to-date corrections, over oceans and continental surfaces, for different altimetric missions (Topex/Poseidon, Jason-1, Jason-2, GFO, ENVISAT).
- coastal along-track GDR data with specific X-TRACK processing,
- monthly maps of the Arctic sea ice freeboard and thickness for 2002-2017,
- global surface currents (Geostrophic and Ekman) from 1999-2008,
- submesoscale filaments (FSLE) available globally for the period 12/2000-04/2009.
The CTOH works in close collaboration with scientific research groups at LEGOS to develop new altimetric products, for monitoring lake and river levels (HYDROWEB), and over the cryosphere (OSCAR).
Established in 1989, the CTOH is an INSU Observational Service, supported by the Centre National de la Recherche Scientifique (CNRS), Centre National d'Etudes Spatiales (CNES), Institut de Recherche pour le Développement (IRD), Observatoire Midi-Pyrénées (OMP), Pôle Océan-Altimétrie-Climat (CPER).