Physics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3702801c&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 2, CiteID L02801
Physics
16
Atmospheric Processes: Atmospheric Electricity, Radio Science: Ionospheric Propagation (0689, 2487, 3285, 4275, 4455), Atmospheric Processes: Remote Sensing, Atmospheric Processes: Instruments And Techniques, Atmospheric Processes: General Or Miscellaneous
Scientific paper
Terrestrial gamma-ray flashes (TGFs) are impulsive (˜1 ms) but intense sources of gamma-rays associated with lightning activity and typically detected via low orbiting spacecrafts. We present the first catalog of precise (<30 km error) TGF source locations, determined via ground-based detection of ELF/VLF radio atmospherics (or sferics) from lightning discharges, which enables precise geolocation of lightning locations. We present the distribution of source-to-nadir distances, established due to effects of Compton scattering on the escaping photons. We find that TGFs occur in coincidence with the lightning discharge, but with a few ms variance, and that a detectable sferic at long distances is nearly always present. The properties of TGF-associated sferics and their connection to multiple-peak TGFs are highly variable and inconsistent, and are classified into two categories.
Cohen Morris B.
Gjestland T.
Inan Umran S.
Said R. K.
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