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Near-Realtime Altimetry Data
In addition to providing MCC-derived surface currents, we also display
near-realtime altimetry-derived surface currents on our weekly
composites as a supplementary data set to provide velocity estimates
where MCC velocities don't exist. The altimetry surface currents are
derived from absolute dynamic topography fields, and represent the
total surface geostrophic flow.
The altimeter product is produced by Ssalto/Duacs and distributed by
Aviso, with support from Cnes. Documentation for the altimeter data
product can be found on the AVISO
website, specifically in the Ssalto/Duacs
User Handbook : (M)SLA and (M)ADT Near-Real Time and Delayed Time
Products. Delivery of the altimeter data product is delayed by one
week relative to the satellite-data acquisition time, and therefore,
these surface velocities are only provided for weekly
composites older than 7 days.
*Data files containing location and velocity information are not
provided for
the altimeter data product. This product is used for display purposes
only.
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