Very High Frequency (VHF) Interferometer

Chong, Zhi Zyong (2017) Very High Frequency (VHF) Interferometer. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text Very High Frequency (VHF) Interferometer - Chong Zhi Zyong - 24 Pages.pdf - Submitted Version Download (681kB)

Abstract

A lightning interferometer is an instrument which can determines the direction of arrival of radiation. Such intruments have been studied and used for several decades. Since lightning is abundantly identified with measurable data, absence of such data prevents the research progress. In this project, a Very High Frequency (VHF) Interferometer is developed which is capable of locating the VHF radiation sources of a lightning flash by correlating the signal that received at two or more antennas. In order to best utilize the additional data, cross correlation algorithm is used to process the signals. This algorithm can locate the entire duration of a lightning flash and then azimuth and elevation angle are also calculated to determine the direction of lightning stroke. This interferometer system also can act as a earlier warning system as it detect the first cloud flashes and a forecast can be made before cloud-to-ground flashes occur. Therefore, this interferometer system is useful for the public citizens in protecting themselves from lightning strikes.

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