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Optical Characteristics of OTD Flashes and the Implications for Flash-Type Discrimination
Publisher: American Meteorological Society
Abstract: Flashes detected by the Optical Transient Detector (OTD) that occur over the continental United States (CONUS) are intercompared with data from the National Lightning Detection Network (NLDN) in order to partition the OTD ...
A Mixed Exponential Distribution Model for Retrieving Ground Flash Fraction from Satellite Lightning Imager Data
Publisher: American Meteorological Society
Abstract: Bayesian inversion method is introduced for retrieving the fraction of ground flashes in a set of flashes observed from a (low earth orbiting or geostationary) satellite lightning imager. The method employs a constrained ...
Retrieving Storm Electric Fields from Aircraft Field Mill Data. Part I: Theory
Publisher: American Meteorological Society
Abstract: It is shown that the problem of retrieving storm electric fields from an aircraft instrumented with several electric field mill sensors can be expressed in terms of a standard Lagrange multiplier optimization problem. The ...
TOA Lightning Location Retrieval on Spherical and Oblate Spheroidal Earth Geometries
Publisher: American Meteorological Society
Abstract: A simple linear algebraic solution is introduced for retrieving the location and time-of-occurrence of lightning ground strikes on a spherical earth from a network of four or more time-of-arrival sensors. Since the solution ...
Retrieving the Fraction of Ground Flashes from Satellite Lightning Imager Data Using CONUS-Based Optical Statistics
Publisher: American Meteorological Society
Abstract: retrieval method is introduced for estimating the fraction of ground flashes in a set of N flashes observed from either a low earth-orbiting or geostationary satellite lightning imager. The methodology exploits the fact ...
General Matrix Inversion Technique for the Calibration of Electric Field Sensor Arrays on Aircraft Platforms
Publisher: American Meteorological Society
Abstract: A matrix calibration procedure has been developed that uniquely relates the electric fields measured at the aircraft with the external vector electric field and net aircraft charge. The calibration method can be generalized ...
Data Retrieval Algorithms for Validating the Optical Transient Detector and the Lightning Imaging Sensor
Publisher: American Meteorological Society
Abstract: A linear algebraic solution is provided for the problem of retrieving the location and time of occurrence of lightning ground strikes from an Advanced Lightning Direction Finder (ALDF) network. The ALDF network measures ...
Lightning Charge Retrievals: Dimensional Reduction, LDAR Constraints, and a First Comparison with LIS Satellite Data
Publisher: American Meteorological Society
Abstract: A ?dimensional reduction? (?DR?) method is introduced for analyzing lightning field changes (?Es) whereby the number of unknowns in a discrete two-charge model is reduced from the standard eight (x, y, z, Q, x?, y?, z?, ...
Retrieving Storm Electric Fields from Aircraft Field Mill Data. Part II: Applications
Publisher: American Meteorological Society
Abstract: The Lagrange multiplier theory developed in Part I of this study is applied to complete a relative calibration of a Citation aircraft that is instrumented with six field mill sensors. When side constraints related to average ...
The Optical Transient Detector (OTD): Instrument Characteristics and Cross-Sensor Validation
Publisher: American Meteorological Society
Abstract: Lightning data from the U.S. National Lightning Detection Network (NLDN) are used to perform preliminary validation of the satellite-based Optical Transient Detector (OTD). Sensor precision, accuracy, detection efficiency, ...