Source/sensor: TOPEX/POSEIDON Altimeters, NOAA-n AVHRR
Coverage: 1990 - 2001. Online files: 1990-2001.
Abstract: This product contains data grids and GIF images of 1) sea surface height (SSH) data from TOPEX/POSEIDON, 2) sea surface temperature (SST) data from AVHRR on the NOAA-n satellites.
Both datasets are provided on the same two grid patterns: 1) 0.5 degree grid in latitude and longitude, with gaps where no data are present; 2) 1.0 degree grid, with all gaps filled in by interpolation. SSHs are given in millimeters, for Oct 1992 to Dec 2001 (later grids available online), averaged over 10 days, referenced to the 1993-2001 mean, with tidal and inverted barometer effects removed, all instrument and path corrections applied based on the TOPEX/POSEIDON MGDR-B, except for TMR drift and IB. SSTs are given in 0.01 degree C, for January 1990 to December 2001, averaged over 5 days, using version 4.1 (both final and interim) of the Pathfinder algorithm to convert radiances to SST. The 1 degree, 5-day grids have a gaussian average whose parameters are described in the documentation.
These datasets contain data, browse images, statistics, documentation and read software. The data files are in NetCDF format; the browse images are in GIF format; the documents in HTML. Java software to animate the GIF images between any two times is also included.
These two datasets or "DVD Folders" are part of a larger set (DVD-ROM set), produced under the guidance of the Data Products Committee of the World Ocean Circulation Experiment. The larger set includes in-situ data on ocean temperature, salinity, tracers, currents (from current meters, ADCP, floats and drifters), sea level, surface meteorology, as well as a comprehensive overview of data collection during WOCE. This is version 3 of the WOCE datasets. These datasets replace the previous version 1 (PO.DAAC product #100, which included gridded wind data) and version 2 (PO.DAAC product #127). The complete WOCE v3 collection can be purchased from the National Oceanographic Data Center (http://www.nodc.noaa.gov). These two datasets, apart from the WOCE v3 collection, are available from the JPL PO.DAAC (http://podaac.jpl.nasa.gov).
A complementary "DVD Folder" produced by CERSAT (http://www.ifremer.fr/cersat), and also released as part of the WOCE v3 DVD-ROM set, features wind speed and stress vectors from the ERS-1 and ERS-2 scatterometers for August 1991 to January 2001, as well as ADEOS/NSCAT winds for September 1996 to June 1997 and QuikSCAT/SeaWinds for July 1999 to today. The CERSAT fields are interpolated every 1 degree (0.5 degree for QuikSCAT) over three time averaging periods - day (QuikSCAT only), week and month - with an objective mapping scheme that ensures uniform smoothness and no empty grid nodes, and include estimates of wind divergence and stress curl.
Data Set Volume: 783 MB (SL and SST combined compressed)
Smallest order: One file via FTP
Data Format: NetCDF, GIF.
Media Format: These data are available via FTP to podaac.jpl.nasa.gov,
Comments: For the latest data updates, errors found, etc, please check the online versions of these DVD Folders. |
