HR: 1340h
AN: SF23A-0030    [Abstracts]
TI: The development of an OpeNDAP satellite data server for CEOP
AU: * Deng, D
EM: ddeng@gmu.edu
AF: George Mason University, LAITS, 9801 Greenbelt Road, Suite 316-317, Lanham, MD 20706 United States
AU: Di, L
EM: ldi@gmu.edu
AF: George Mason University, LAITS, 9801 Greenbelt Road, Suite 316-317, Lanham, MD 20706 United States
AU: Enloe, Y
EM: yonsook@mindspring.com
AF: SGT, Inc., 7701 Greenbelt Road, Suite 400, Greenbelt, MD 20770 United States
AU: Holloway, D
EM: d.holloway@gso.uri.edu
AF: University of Rhode Island, Graduate School of Oceanography, South Ferry Road, Narragansett, RI 02882 United States
AU: McDonald, K R
EM: mcdonald@rattler-e.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 586, Greenbelt, MD 20771 United States
AB: This paper describes a project that develops an OPeNDAP server to serve satellite data to the Coordinated Enhanced Observing Period (CEOP) community. CEOP, which is built as the foundation of the World Climate Research Program (WCRP) in Cooperation with World Meteorological Organization (WMO) and the Committee on Earth Observation Satellites (CEOS) under the Framework of Integrated Global Observing Strategy Partnership (IGOS-P), seeks to establish an integrated global observing system for the water cycle to respond to both scientific and social needs. CEOP uses data from field observation, data assimilation, model outputs, and satellite remote sensing in research. The multi-source data integration is one of keys for the success of the CEOP program. Much of the satellite data identified in CEOP are Level-1B and Level-2 products. Data in these products are in Swath coordinates. While CEOP users commonly use the OPeNDAP protocols to access CEOP data for research, most of swath data are not available via this protocol. Instead, many space agencies have developed satellite data servers that implement the Open GIS Consortium (OGC)'s Web Coverage Service (WCS) Specification for serving satellite data to geospatial community. In order to provide satellite data to CEOP community, we developed a middleware, which act as a wrapper around an OpenGIS WCS implementation providing a gateway from the OPeNDAP protocols. The combination of the wrapper and any OGC-compliant WCS server acts as an OPeNDAP server. To provide the capabilities required to convert from Swath coordinates to an equirectangular latitude-longitude coordinate reference system, as well as perform grid cell interpolation and geo-spatial selection the server leverages the capabilities provided by an OGC WCS implementation. Basically, the middleware module does three things: 1). Translate the client requests in OpeNDAP protocols to WCS protocols and pass the requests to a WCS server; 2). Translate the server response in WCS protocols to DAP protocols and pass the response back to client; and 3). Handle the difference between the DAP protocols and WCS protocols. This paper discusses the details of the implementation.
UR: http://laits.gmu.edu
DE: 1899 General or miscellaneous
DE: 1655 Water cycles (1836)
DE: 1694 Instruments and techniques
DE: 1836 Hydrologic budget (1655)
DE: 1640 Remote sensing
SC: Special Focus: Advances in Data Acquisition, Management, Analysis and Display [SF]
MN: 2004 AGU Fall Meeting