Irregular array-based lightning very high frequency interference positioning method

Abstract

The invention discloses a lightning very high frequency interference positioning method based on an irregular array, which relates to the field of lightning positioning and comprises the following steps: S1, acquiring antenna positions of N site interferometers, and calculating the time difference tauij of a radiation source reaching all baselines; s2, judging whether all antennas are on the same plane or not, if so, entering S3, and otherwise, entering S4; s3, calculating the positioning incoming direction of the radiation source by adopting the M groups of baselines, and entering S6; s4, any three sites are combined to form species selection; s5, calculating the incoming direction of the radiation source under each selection, and determining the positioning incoming direction of the radiation source; s6, calculating an elevation angle and an azimuth angle of the radiation source according to the positioning direction of the radiation source; when interference positioning is carried out, the non-coplanar characteristic of the antenna array and the increase of the number of antennas can obviously improve the positioning result of the interferometer, and the method can be applied to any irregular array, that is, the antenna array can be arranged randomly, the antenna array is not required to be coplanar, and the formed base lines are not required to be mutually orthogonal. And the installation difficulty of the antenna is effectively reduced.

Description

technical field [0001] The invention relates to the field of lightning positioning, in particular to a lightning very high frequency interference positioning method based on an irregular array. Background technique [0002] Lightning discharges produce abundant very high frequency (VHF) radiation to which clouds are almost transparent. By detecting and locating these radiations, the dynamics of how lightning channels develop and propagate in thunderstorm clouds can be revealed. The most widely used method is to erect at least three antennas, and the distance (baseline) between adjacent antennas is several meters to tens of meters, which is called VHF short baseline lightning interferometer. These antennas are all distributed on the same horizontal plane, and the array structure is an isosceles right triangle or a cross, which can form two mutually orthogonal baselines. Assuming that the radiation source generated by lightning several kilometers away is parallel incident to...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the traditional algorithm requires that in the actual site layout process, it is very inconvenient to ensure that each site is strictly located on the same horizontal plane and orthogonal to each other.

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