AMSNEXRAD-Automated Detection of Meteorite Strewnfields in Doppler Weather Radar
Michael Hankey, Marc Fries, Rob Matson, Jeff Fries
Planetary and Space Science
In Press, Accepted Manuscript, Available online 17 February 2017
“For several years meteorite recovery in the United States has been greatly enhanced by using Doppler weather radar images to determine possible fall zones for meteorites produced by witnessed fireballs. While most fireball events leave no record on the Doppler radar, some large fireballs do. Based on the successful recovery of 10 meteorite falls ‘under the radar’, and the discovery of radar on more than 10 historic falls, it is believed that meteoritic dust and or actual meteorites falling to the ground have been recorded on Doppler weather radar1.
Up until this point, the process of detecting the radar signatures associated with meteorite falls has been a manual one and dependent on prior accurate knowledge of the fall time and estimated ground track. This manual detection process is labor intensive and can take several hours per event.
Recent technological developments by NOAA now help enable the automation of these tasks. This in combination with advancements by the American Meteor Society2 in the tracking and plotting of witnessed fireballs has opened the possibility for automatic detection of meteorites in NEXRAD Radar Archives. Here in the processes for fireball triangulation, search area determination, radar interfacing, data extraction, storage, search, detection and plotting are explained.”