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THREDDS Data Server

NASA's Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC) is pleased to announce the release of a new THREDDS (Thematic Real-time Environmental Distributed Data Services) Data Server Catalog Service.

MODIS Land Products C5

The ORNL DAAC announces two tools for subsetting land products from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensors onboard the Terra and Aqua satellites.

The first tool allows users to obtain MODIS land products for 1,052 selected sites worldwide in ASCII format (7 x 7 km) and in GeoTIFF format (25 x 25 km). To access this tool see

ORNL Outage March 15-16

The ORNL DAAC web site will be unavailable between the hours of 4:00 a.m. Eastern Daylight Time (EDT) on Saturday, March 15 and 10:30 a.m. Eastern Daylight Time (EDT) on Sunday, March 15, 2008 to upgrade the electrical and cooling systems in building 5600.

Winter 2008 Newsletter Released

The Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC) funded by NASA is pleased to present the Winter 2008 issue of the ORNL DAAC Newsletter. This semiannual newsletter contains announcements of new data sets and services being offered to the public as well as news of other happenings and events. We welcome feedback. Send comments and suggestions to

EDG to WIST Transition

In an ongoing effort to improve services to our customers, the ORNL NASA DAAC is pleased to announce that the Earth Observing System (EOS) Data Gateway (EDG) will be replaced in mid-2008, with WIST (Warehouse Inventory Search Tool) for the EOS Clearing House (ECHO). Although ORNL DAAC has transitioned from EDG to ECHO, and WIST is available for your immediate use, the complete transition of all EDG metadata for some EOS data providers is still in progress. We will notify you again, when all EOS data providers have completed the transition to ECHO and WIST.

Guidance for Data Providers

Are you planning to share your data with other investigators or submit data to an archive for public distribution? If so, we suggest that you look at the ORNL DAAC's Best Practices for Preparing Environmental Data Sets to Share and Archive.

At the request of data providers, the ORNL NASA DAAC has updated guidance (earlier version published in 2000) so that all data products will meet basic standards before they are archived or distributed.

Website Down 2/6/08 7:30-8:00 a.m. EST

The ORNL DAAC web site will be unavailable between 7:30 a.m. and 8:00 a.m., Eastern Standard Time (EST), on Wednesday, February 6, 2008 due to scheduled hardware and software maintenance activities.

MAPSS Version 1.0 Available

The ORNL NASA DAAC is please to announce the release of a new vegetation distribution model product, MAPSS: Mapped Atmosphere-Plant-Soil System Model, Version 1.0. The MAPSS model was developed by the Pacific Northwest Research Station USDA Forest Service and has been used extensively by the IPCC (Intergovernmental Panel on Climate Change) in regional and global assessments of climate change impacts on vegetation.

New Mercury Advanced Search Tool

The ORNL NASA DAAC is pleased to announce the public release of the new version of our Mercury Advanced Search tool. Mercury is a harvest, search, distribution, and data discovery system. From Mercury, you can search the ORNL DAAC's data holdings using:

  • free text,
  • fielded,
  • spatial, or
  • temporal parameters.

Mercury is now open source and service oriented architecture based. Many new features have been added, including:

Beta Test Available for MODIS Global Tool

The ORNL NASA DAAC announces the beta release of the MODIS Global Subsetting and Visualization Tool for Collection 5. This tool provides custom subsets of Moderate Resolution Imaging Spectroradiometer (MODIS) Land products in ASCII format on demand for any location on Earth.