National Oceanic and Atmospheric Administration, United States Department of Commerce


Data Description

    OSTM/Jason-2 Level-2 Geophysical Data Records (GDR), 2008 to 2019 - This collection contains the Ocean Surface Topography Mission (OSTM)/Jason-2 Level-2 Geophysical Data Records (GDR) data files. The level-2 X-GDR are available as 3 datatypes: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. They are based on orbits from DORIS propagator and forecast meteorological fields for the geophysical corrections. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. The IGDRs have a latency of 1 - 2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo "waveform" data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. The S-GDR is a superset of the GDR, containing the waveform data. The S-GDRs are generated every 10 days. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDRs are also available in BUFR format.

Details - Metadata, Documentation



(maximum range is 366 days)
Search by: Date Cycle

Start Date
(format: YYYY-MM-DD)

Start DateStart Time (UTC)
(format: HH:MM:SS)

End Date
(format: YYYY-MM-DD)
End DateStart to EndEnd Time (UTC)
(format: HH:MM:SS)
Specify the range of the times for: Each Day Or The Entire Range Of Days

Advanced Search


Operational GDRs
Jason Operational GDR - NetCDF
Jason Operational GDR - BUFR
Jason Operational GDR Sea Surface Height Anomaly - NetCDF
Intermediate GDRs
Jason Interim GDR - NetCDF
Jason Interim Sensor GDR - NetCDF
Jason Interim GDR Sea Surface Height Anomaly - NetCDF
Final GDRs
Jason Final GDR - NetCDF
Jason Final Sensor GDR - NetCDF
Jason Final GDR Sea Surface Height Anomaly - NetCDF

Ascending (odd pass number)
Descending (even pass number)



to place large order without reviewing inventory or granule (file) metadata.
to place small order after reviewing inventory and granule metadata, including browse images when available.