Estimating river discharges in the Ogooué river basin using satellite altimetry data Observing, understanding and forecasting the dynamics of our planet Bogning, S. Frappart, F. Blarel, F. /Nino, Fernando /Mahé, Gil /Seyler, Frédérique /Braun, Jean-Jacques Onguéné, R. Etamé, J. ALTIMETRIE RADAR NIVEAU DE L'EAU ESTIMATION SURVEILLANCE DEBIT VARIATION ANNUELLE JAUGEAGE COURS D'EAU REJET 1995 2017 Radar altimetry, initially developed to observe the surface topography of the ocean, is now commonly used for the monitoring of inland water bodies. In this study, an altimetry-based gauging network was built in the Ogooué River Basin (ORB), in Gabon, Central Africa. It is composed of altimetry-based virtual stations (VS) under the altimetry tracks of ERS-2/ENVISAT/ SARAL, Cryosat-2, Sentinel-3A and Jason-2/Jason-3. River discharge was estimated from 1995 to 2017 combining water level records from several virtual stations close to Lambaréné gauge station and the rating curve from this station. Very good agreement was found in terms of R (>0.95), RMSE and annual discharge. IEEE 2018 text https://www.documentation.ird.fr/hor/fdi:010078605 fdi:010078605 Bogning S., Frappart F., Blarel F., Nino Fernando, Mahé Gil, Seyler Frédérique, Braun Jean-Jacques, Onguéné R., Etamé J.. Estimating river discharges in the Ogooué river basin using satellite altimetry data. In : . Observing, understanding and forecasting the dynamics of our planet IEEE, 2018, 9304-9307 IGARSS.International Geoscience and Remonte Sensing Symposium, 38, Valence (ESP), 2018/07/22-27 EN GABON