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Application of Bayesian Classification to Content-Based Data ManagementThe high volume of Earth Observing System data has proven to be challenging to manage for data centers and users alike. At the Goddard Earth Sciences Distributed Active Archive Center (GES DAAC), about 1 TB of new data are archived each day. Distribution to users is also about 1 TB/day. A substantial portion of this distribution is MODIS calibrated radiance data, which has a wide variety of uses. However, much of the data is not useful for a particular user's needs: for example, ocean color users typically need oceanic pixels that are free of cloud and sun-glint. The GES DAAC is using a simple Bayesian classification scheme to rapidly classify each pixel in the scene in order to support several experimental content-based data services for near-real-time MODIS calibrated radiance products (from Direct Readout stations). Content-based subsetting would allow distribution of, say, only clear pixels to the user if desired. Content-based subscriptions would distribute data to users only when they fit the user's usability criteria in their area of interest within the scene. Content-based cache management would retain more useful data on disk for easy online access. The classification may even be exploited in an automated quality assessment of the geolocation product. Though initially to be demonstrated at the GES DAAC, these techniques have applicability in other resource-limited environments, such as spaceborne data systems.
Document ID
20040171223
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Lynnes, Christopher
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Berrick, S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gopalan, A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hua, X.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shen, S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smith, P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Yang, K-Y.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wheeler, K.
(NASA Ames Research Center Moffett Field, CA, United States)
Curry, C.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 22, 2013
Publication Date
January 1, 2004
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: NASA''s Earth Science Technology Conference
Location: Palo Alto, CA
Country: United States
Start Date: June 22, 2004
End Date: June 24, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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