The April 27, 2011, tornado outbreak was the second-deadliest in U.S. history, and the deadliest since the Doppler Radar system has been used to warn communities.
Recent images of the April 27 storm damage path have been captured by NASA's Terra satellite, part of NASA's Earth Observing Satellite system, or EOS.
The past decade has seen a rapid increase in availability and usage of near-real-time data from satellite sensors.
The Global Spatial Data Infrasructure (GSDI) Association announced its 2010-11 Small Grants Program.
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