Broadband VHF sources locating system using arrival-time differences for mapping of lightning discharge process

Tantisattayakul, Thanapol; Masugata, Katsumi; Kitamura, I.; Kontani, Ken

doi:10.1016/j.jastp.2005.04.002

Cited by 17 publications

(14 citation statements)

References 19 publications

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“…For VHF broadband observations, a circular flat-plate antenna is commonly utilized Morimoto et al 2004;Tantisattayakul et al 2005). However, snow coverage on the antenna in winter may attenuate the reception of VHF broadband wave and cannot be removed when conducting remote observation.…”

Section: ) Discone Antennamentioning

confidence: 99%

Three-Dimensional VHF Lightning Mapping System for Winter Thunderstorms

Nishihashi¹,

Shimose²,

Kusunoki

et al. 2013

Journal of Atmospheric and Oceanic Technology

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A three-dimensional (3D) winter lightning mapping system employing very high frequency (VHF) broadband signals was developed for continuous remote observation in winter. VHF broadband pulses radiated by leader progression are received with three discone antennas arranged in a triangle (20-30 m) and recorded on a high-speed digital oscilloscope (1.25-GHz sampling) with GPS digital timing data. The two-dimensional (2D) mapping for azimuth and elevation of the VHF radiation sources was conducted by computing the arrival time differences of three pulses using a cross-correlation technique. From azimuth and elevation data from two sites extracted within a given time frame, 3D lightning mapping was performed using the triangulation scheme. An observation network for winter lightning was constructed within a comprehensive meteorological observation network in the Shonai area, which is located on the coast of the Japan Sea. This report includes the preliminary 2D and 3D mapping of winter lightning observed on 3 December 2010. The horizontal and vertical distributions of VHF radiation sources were consistent with the radar echo observed with X-band Doppler radar. These results indicate that the system can detect winter lightning discharges and perform 2D and 3D lightning mapping in detail.

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Section: ) Discone Antennamentioning

confidence: 99%

Three-Dimensional VHF Lightning Mapping System for Winter Thunderstorms

Nishihashi¹,

Shimose²,

Kusunoki

et al. 2013

Journal of Atmospheric and Oceanic Technology

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“…The relationships between τ 13 and the incident angle θ 13 and between τ 24 and the incident angle θ 24 can be represented by (5). The azimuth angle α 0 and elevation angle β for the straight lines that pass through antennas 1 and 3 and through antennas 2 and 4 can be represented using θ 13 and θ 24 [25] cos θ 13 = cos β cos α 0 (6a) cos θ 24 = cos β sin α 0 .…”

Section: Development Of Locating Systemmentioning

confidence: 99%

Development of Locating System of Pulsed Electromagnetic Interference Source Based on Advanced TDOA Estimation Method

Tian

Tatematsu

Tanabe

et al. 2014

IEEE Trans. Electromagn. Compat.

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A locating system based on an advanced time difference of arrival (TDOA) estimation method is developed to locate the position of a discharge source to avoid pulsed electromagnetic interference (PEMI) with the surrounding radio communication environment. In general, from the waveforms of PEMI waves received by an antenna array, the source position can be located or the direction of arrival (DOA) of the EM waves can be estimated by applying TDOA-based methods. However, owing to noises and multipath waves that occur at the metal surfaces of electric power equipment, the estimation accuracy of the TDOA may decrease, and the location accuracy will be degraded. To improve the accuracy of TDOA estimation, we propose a new TDOA estimation technique. In our developed locating system, PEMI waves are received by a four-antenna-square array and the DOA is estimated from the TDOA, which is estimated using the generalized crosscorrelation phase transform method in combination with the proposed technique. A PEMI source is ultimately located by aiming a charge-coupled device camera, installed at the center of the antenna array, at the estimated DOA. The estimation accuracy of the locating system is evaluated through experimental measurements. The results show that the developed locating system can locate the position of a PEMI source existing within about 30 m from the system with high accuracy.Index Terms-Direction of arrival (DOA), localization, pulsed electromagnetic (EM) interference (PEMI), spark discharge, time difference of arrival (TDOA). 0018-9375

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“…12-Determine the delay times in each segment. These are given as t 21 = the delay between antenna 2 and antenna 1 for receiving for receiving signal t 23 = the delay between antenna 2 and antenna 3 for receiving for receiving signal t 24 = the delay between antenna 2 and antenna 4 for receiving for receiving signal To calculate the azimuth (Į) and the elevation (ȕ) of a lightning leader by using the short-baseline TOA technique, the following proposed time based equations are to be used [5],…”

Section: Preliminary Calculationmentioning

confidence: 99%

“…A fourth antenna, located as a certain distance away depending on the measuring limitation, can be added to provide the information needed to determine the exact coordinate (X,Y,Z) of the signal source. This TOA technique is usually used for the purpose of lightning location in a small region (10 to 15 km radius) [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Lightning Flash and Detection Using Time of Arrival Method Based on Four Broadband Antennas

Mashak¹,

Afrouzi²,

Abdul‐Malek³

2011

2011 First International Conference on Informatics and Computational Intelligence

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Various methods are used to locate cloud-toground lightning flash. The accuracy of the methods depends on the number of sensor stations, station topology, mathematical model adopted for the analyses, and the type of measuring equipment. For a single station with the configuration of short baseline in a measuring system, the accuracy of analysis is mostly based on the chosen mathematical equations (and assumptions) which can be solved in either linear or nonlinear mode. This paper concentrates on the simulation of a lightning flash and its detection based on the Time of Arrival (TOA) method by utilizing four broadband antennas. The accuracy of the TOA method is also evaluated in this work. A Matlab based simulation of the measuring system is implemented to construct a randomly located lightning flash with its corresponding electromagnetic radiation. Then, suitable mathematical models used as measurement systems based on the 3-antenna TOA method to determine the azimuth and elevation angles, which in turn can be used for the calculation of flash coordinates in term of (X,Y,Z) with the help of the fourth antenna.

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Broadband VHF sources locating system using arrival-time differences for mapping of lightning discharge process

Cited by 17 publications

References 19 publications

Three-Dimensional VHF Lightning Mapping System for Winter Thunderstorms

Three-Dimensional VHF Lightning Mapping System for Winter Thunderstorms

Development of Locating System of Pulsed Electromagnetic Interference Source Based on Advanced TDOA Estimation Method

Simulation of Lightning Flash and Detection Using Time of Arrival Method Based on Four Broadband Antennas

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