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kerfoot edited this page Jul 23, 2014 · 24 revisions

#Contents#

##Introduction##

This wiki is a collection of documents and resources describing the NetCDF file specification, data provider registration process and file submission process for contributing real-time and delayed-mode glider data sets to the U.S. IOOS National Glider Data Assembly Center (NGDAC).

The goals of the NGDAC are:

  • Develop a simple, properly documented NetCDF file specification that preserves the resolution of the original data set.
  • Provide glider operators with a simple process for registering and submitting glider data sets to a centralized storage location.
  • Increase data set availability and access methods via existing web services and standards.
  • Enable the transmission of glider data sets on the Global Telecommunication System.
  • Work with the National Ocean Data Center to create a permanent archive of these valuable data sets.

The NGDAC accepts a simple NetCDF file specification representing a single profile of water column measurements logged by a glider. Groups of these NetCDF files gathered during a deployment (also known as a trajectory) are uploaded to the NGDAC via ftp by individual glider operators. Once they arrive at the NGDAC, the files are validated for compliance, aggregated into a single dataset representing the deployment/trajectory and distributed via ERDDAP and THREDDS end-points. The data sets served by the NGDAC provide access to the trajectory/deployment data either as time-series or on a profile-by-profile basis.

The National Data Buoy Center accesses these data sets from the ERDDAP and/or THREDDS end-points, performs some quality checking of the data, encodes the profiles into BUFR format and releases the BUFR messages on the Global Telecommunication System, making them available for assimilation by regional and global scale ocean forecasting models.

We recommend a thorough reading of the above documentation before beginning the data submission process. Additional questions and information requests should be directed to:

John Kerfoot
Data Analyst/Systems Programmer
Coastal Ocean Observation Lab
Rutgers University
71 Dudley Road
New Brunswick, NJ 08901, USA
[email protected]
(848) 932-3344
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