George Percivall
Directing the Evolution of GEOSS Technical Architecture
“As a “system of systems”, GEOSS is composed of contributed Earth Observation systems, ranging from primary data collection systems to systems for the creation and distribution of information products. Although all GEOSS systems continue to operate within their own mandates, GEOSS systems can leverage each other so that the overall GEOSS becomes much more than the sum of its component systems. This synergy develops as each contributor supports common arrangements designed to make shared observations and products more accessible, comparable, and understandable.” In this opinion editorial, George Percivall, chief architect of the GEOSS Interoperability Program, describes the remarkable progress that GEOSS builders have already made.
George Percivall, posted on
December 8th, 2009
Articles, Earth Observation, GEOSS/ICEO News, OpEd
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The Open Geospatial Consortium (OGC®) issues a Request for Information (RFI)
Seeking to establish alliances and share information amongst various Standards Development Organizations (SDOs) with technology relevant to fusion, the Open Geospatial Consortium has issued a Request for Information (RFI). Responses are requested by August 12, 2009 and the RFI includes instructions for how organizations can respond. The information gathered is to be used in preparation of a Fusion Standards Study.
George Percivall, posted on
July 19th, 2009
Articles, Earth Observation, Technology
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Google, Microsoft and the Open Geospatial Consortium (OGC)
People can now easily visualize what their next trip or hike will look like; they can readily combine EO data with other kinds of geographic data ; and they can easily save the views they have constructed and send them to other users. However, geospatial technologies are more complex than most people realize.
George Percivall, posted on
June 10th, 2008
Articles, Earth Observation, Technology
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NASA Image of the Day
Orbital Sunrise
The Expedition 24 crew on the International Space Station photographed this image of polar mesospheric clouds illuminated by an orbital sunrise. Polar mesospheric, or noctilucent ("night shining"), clouds usually are seen at twilight, following the setting of the sun below the horizon and darkening of Earth's surface. Occasionally the station's orbital track becomes nearly parallel to Earth's day/night terminator for a time, allowing the clouds to be visible to the crew at times other than the usual twilight because of the station's altitude. This photograph shows polar mesospheric clouds illuminated by the rising, rather than setting, sun at center right. Low clouds on the horizon appear yellow and orange, while higher clouds and aerosols are illuminated a brilliant white. Polar mesospheric clouds appear as light blue ribbons extending across the top of the image. The station was located over the Greek island of Kos in the Aegean Sea (near the southwestern coastline of Turkey) when the image was taken at approximately midnight local time. The orbital complex was tracking northeastward, nearly parallel to the terminator, making it possible to observe an apparent "sunrise" located almost due north. A similar unusual alignment of the ISS orbit track, terminator position and seasonal position of Earth's orbit around the sun allowed for this striking imagery of over the Southern Hemisphere. Image Credit: NASA
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