for GEOSS and IEOS to facilitate the sharing and applied usage of global, regional and local data from satellites, ocean buoys, weather stations and other surface and airborne Earth observing instruments.

There are many common themes in both programs. For example, a USGEO Working Group on Architecture and Data Management is developing a “Service Oriented Architecture” (SOA), an underlying structure that will support communications based upon loosely coupled connections among independent programs to create a scalable, extensible, interoperable, reliable, and secure framework.3 These attributes are similar to those of the Mesobs architecture for a NoN outlined above, except that we propose a comprehensive closed loop architecture that enables user feedback to the observing system.

The national mesoscale NoN should be a vital component of GEOSS over the United States and could be thought of as one of the (very large) systems under its umbrella. This synergism will increase the value and possibly the cost-effectiveness of both efforts.

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