http://phobos.astro.uwo.ca/~pbrown/usaf/dod231.txt

Fireball Detection
Department of Defense Announcement 
(courtesy of Peter Brown)
July 7, 2003

IR sensors aboard US DOD satellites detected the impact of a bolide over 
Park Forest, Illinois, on 27 March 2003 at 05:50:26 UTC. The object 
traveled from the SW to the NE on a heading of 22.3 degrees, with a 
flight path angle of 62.3 degrees from the local horizontal. 
The straight line intersection of the flight path with the ground was at 
41.56 North latitude, 87.67 West longitude.  It was possible to derive a 
velocity for the object of 20 +/- 1 km/sec.  The impact was simultaneously 
detected by space based visible wavelength sensors operated by the US 
Department of Energy.  From these sensors the total radiated energy was 
estimated at 1.4 X 10^11 joules.



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