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an algorithm for obtaining the distribution of 1-meter lightning channel segment altitudes for application in lightning nox production estimationAn algorithm has been developed to estimate the altitude distribution of one-meter lightning channel segments. The algorithm is required as part of a broader objective that involves improving the lightning NOx emission inventories of both regional air quality and global chemistry/climate models. The algorithm was tested and applied to VHF signals detected by the North Alabama Lightning Mapping Array (NALMA). The accuracy of the algorithm was characterized by comparing algorithm output to the plots of individual discharges whose lengths were computed by hand; VHF source amplitude thresholding and smoothing were applied to optimize results. Several thousands of lightning flashes within 120 km of the NALMA network centroid were gathered from all four seasons, and were analyzed by the algorithm. The mean, standard deviation, and median statistics were obtained for all the flashes, the ground flashes, and the cloud flashes. One-meter channel segment altitude distributions were also obtained for the different seasons.
Document ID
20100002096
Document Type
Conference Paper
Authors
Peterson, Harold
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Koshak, William J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 25, 2013
Publication Date
December 14, 2009
Subject Category
Meteorology and Climatology
Report/Patent Number
M09-0781
Meeting Information
American Geophysical Union (AGU) 2009 Fall Meeting(San Francisco, CA)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.