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System for locating the sources of wideband dE/dt from lightningA system has been developed to measure wideband electic field derivatives (dE/dt) at five ground stations in a 15 km x 15 km network at Kennedy Space Center. Individual station responses are normalized using digital filters. Pulse-timing resolution is improved to much less than 50-ns sample interval by interpolation using packing in the frequency domain. A time tag for each pulse is defined as the mean of the times of the rising-edge half peak, peak, and falling-edge half peak. The standard deviation in these times defines the timing error and is shown to be a function of noise and bandwidth rather than digitization rate. Each of the four unknowns for a pulse source location (x,y,z) and time of occurrence (t) is found from the five time-tag measurements using different weightings for all five combinations of the four-station hyperbolic equations. Weighting factors and errors in x,y,z and t are estimated using error propagation techniques.
Document ID
19950036182
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Thomson, E. M.
(Unviersity of Florida, Gainesville, FL United States)
Medelius, P. J.
(Unviersity of Florida, Gainesville, FL United States)
Davis, S.
(Unviersity of Florida, Gainesville, FL United States)
Date Acquired
August 16, 2013
Publication Date
November 20, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: D11
ISSN: 0148-0227
Subject Category
Meteorology And Climatology
Accession Number
95A67781
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-91-0093
CONTRACT_GRANT: NGT-40015
CONTRACT_GRANT: NAG10-0049
CONTRACT_GRANT: NSF DMS-91-15752
CONTRACT_GRANT: F49620-92-J-0302
Distribution Limits
Public
Copyright
Other

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