This June 1997 release of satellite altimeter data collected by the U.S. Navy Geosat mission represents a significant improvement over previous versions. The ten CD-ROMs contain geophysical data records (GDRs) which span both the Geodetic Mission (GM: 3/85 - 9/86) and Exact Repeat Mission (ERM: 11/86 - 12/89). The GDRs incorporate a new 10-cm satellite orbit computed by the NASA Goddard Space Flight Center using the JGM-3 gravity model. In addition, the overall accuracy of the data is increased by new geophysical corrections (CSR 3.0 tides; model troposphere from the NCEP/NCAR reanalysis; IRI95 ionosphere; a new sea state bias based on wind, wave and satellite attitude; and corrections for clock drift and timing bias). The GDRs are stored in daily files using the same 78-byte, integer binary format as previous releases of the Geosat GDRs. CD#1 (first GM) and CD#5 (first ERM) contain documentation, tabular data, "high-precision" corrections, figures, and the CD-ROM handbook which can be viewed
The following table shows how the daily GDRs are stored in the ten CD set, for the entire mission:
Customers can order the complete set of 10 discs, holding both the Geodetic and Exact Repeat Mission data, or make separate purchases of the Geodetic Mission (Discs 1-4) or the Exact Repeat Mission (Discs 5-10).
NOTE: Advanced programming skills are strongly recommended for users of this CD-ROM product.
NOAA Server access page
Data Set Citation
NOAA/NESDIS/National Oceanographic Data Center
GEOSAT Altimeter JGM-3 Data from the Geodetic Mission and Exact Repeat Mission on CD-ROM
Dataset Release Date:
NODC USER SERVICES Phone:
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There is a fee for the CD-ROMs.
(301)713-2857 x 121
John.Lillibridge at noaa.gov
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