Abstract:
GPS-based Operational Geophysical Data Record (GPS-OGDR-SSHA) for OSTM/Jason-2
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Date: June 5, 2009
The OSTM/Jason-2 GPS-OGDR-SSHA product is identical to the official OGDR-SSHA
product generated and distributed by NOAA and EUMETSAT, except that it contains
two additional fields in the NetCDF file:
1) gps_alt -
... GPS-based orbit altitude of the satellite.
2) gps_ssha - Sea surface height anomaly derived by using the GPS-based orbit
altitude (gps_alt) instead of the DORIS-DIODE based orbit altitude (alt).
e.g. ssha-alt+gps_alt
The GPS-OGDR-SSHA product is available with a typical latency of 4 hours from
the last available measurement on each data file, and the GPS-based orbit
altitude has accuracies of < 1.5 cm (RMS).
The GPS-OGDR-SSHA product is available via ftp at the Physical Oceanography
Distributed Active Archive Center (PO.DAAC):
ftp://podaac.jpl.nasa.gov/pub/sea_surface_height/ostm/preview/GPS-O...
Note that the Jason-2 GPS-OGDR-SSHA product is a research-grade product that is
generated on a best efforts basis by the Orbiter and Radio Metric Systems
group at JPL.
Please refer questions or comments to:
Shailen Desai (Shailen.Desai@jpl.nasa.gov) 
