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Ocean Surface Topography from Space
DATA



Sea surface topography data sets.
PO.DAAC - Sea surface topography data sets.
Website
OSTM/Jason-2 GPS based orbit near real time sea surface height
OSTM - OSTM/Jason-2 GPS based orbit near real time sea surface height
Website   |  Data
  AltiKa - AltiKa GPS based orbit near real time sea surface height
Coming Soon
Integrated Multi-Mission Ocean Altimeter Data for Climate Research complete time series Version 2
Integrated Multi-Mission Ocean Altimeter Data for Climate Research complete time series Version 2
Website   |   Data
Reconstructed Sea Level, 1950-2009
Reconstructed Sea Level, 1950-2009
Website  |   Data
Global Mean Sea Level Trend
Global Mean Sea Level Trend
Website   |   Data
Data Providers icon
Data Providers - Partner agencies who provide data from NASA and other altimeter missions.
Link



Altimeter data are used:

  • As input into dynamic models for long term climate forecasting and prediction,
  • To improve the knowledge of ocean tides and develop global tide models,
  • To monitor the variation of global mean sea level and its relationship to changes in ocean mass and heat content, and
  • To map the general circulation variability of the ocean, including the ocean mesoscale, over decades and in near real-time using multi-satellite altimetric sampling.

Other complementary data sources include sea surface temperature measurements from satellites, and in-situ measurements from buoys and drifters. For NASA's altimetry missions, taking measurements and turning them into usable scientific data products involves ground-based verification of the satellite measurements, an elaborate satellite telecommunications system for transmitting and receiving the data from its instruments, and a complex data processing effort involving two NASA centers, the French space agency, CNES, and our partners at NOAA and EUMETSAT.

Data from these missions are delivered to customers in map or digital form. Data products are generated for:

  • Sea surface height
  • Geostrophic velocity vectors
  • Wind speed
  • Wave Height

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