Concept information
Preferred term
JASON-1
Definition
- Jason-1 is the first follow-on to the highly successful TOPEX/Poseidon mission that measured ocean surface topography to an accuracy of 4.2 cm, enabled scientists to forecast the 1997-1998 El Nino, and improved understanding of ocean circulation and its effect of global climate. The joint NASA-CNES program launched Jason-1 on December 7, 2002 from Vandenberg AFB, CA. Like TOPEX/Poseidon, the payload includes both American and French instruments. Jason-1 altimeter data is part of a suite of data provided by other JPL-managed ocean missions--the GRACE mission will use two satellites to accurately measure Earth's mass distribution, and the QuikSCAT scatterometer mission will measure ocean-surface winds. From the moment the Jason-1 project began in September 1993 to the official memorandum of understanding in December 1996 and the satellite launch in December 2002, cooperation between CNES and NASA has been the driving force behind its success. The two space agencies have combined their expertise in satellite design and operation, particularly for the ground segment-the nerve centre of the mission. NASA has responsibility for satellite control and the instruments it is supplying. To operate the satellite and process and exploit data, CNES has developed the SSALTO multimission altimetry centre. SSALTO also processes data from TOPEX/Poseidon and Envisat, and controls and operates the Poseidon and DORIS instruments (including DORIS on the Spot series of satellites). JPL also uses SSALTO for Jason-1. For more information on Jason-1, see: "http://www-aviso.cls.fr/html/missions/jason/welcome_uk.html" and "http://topex-www.jpl.nasa.gov/mission/jason-1.html" For more information on Earth Science Enterprise (ESE), see: "http://earth.nasa.gov/" (en)
Broader concept
- J - L (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/a82d7e56-6903-496b-ab36-0b5496e8936c
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