Thunderstorm cloud point charge positioning altitude correction method based on three-dimensional atmospheric electric field measurement
A technology of atmospheric electric field and correction method, which is applied in the field of lightning detection, can solve problems such as the inability to accurately predict the time and location of lightning, and the difficulty of making significant breakthroughs in prediction accuracy.
Active Publication Date: 2021-05-28
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology
[0002] In daily life, lightning rods can effectively reduce the economic losses caused by lightning disasters, but these belong to the category of passive lightning protection, and cannot accurately predict the time and location of lightning occurrence
In recent years, lightning warning technology has been developed rapidly. By analyzing the time-domain characteristics of the three-dimensional atmospheric electric field in sunny and thunderstorm weather, it provides a way to track the trajectory of thunderstorm clouds during the thunderstorm occurrence stage. However, existing research is promoting based on At the same time as the thunderstorm cloud detection work of the three-dimensional atmospheric electric field measurement, the negative impact of the altitude of the atmospheric electric field instrument on the location accuracy of the thunderstorm cloud point charge is ignored, and it is difficult to make a significant breakthrough in the prediction accuracy
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[0032] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0033] The invention provides a thunderstorm cloud point charge positioning altitude correction method based on three-dimensional atmospheric electric field measurement, comprising the following steps:
[0034] 1. Establish a thunderstorm cloud point charge location altitude correction model, which is specifically:
[0035] Such as figure 1 As shown, in the established thunderstorm cloud point charge location altitude correction model, the three-dimensional Cartesian coordinate system is established with N point as the coordinate origin, where: S(x, y, z) is the location of the thunderstorm cloud point charge before altitude correction; N (0,0,0) is the position of the observation point of the three-dimensional atmospheric electric field instrument; the altitude correction point M(0,0,-h) is the intersection point of the Z axis where the elec...
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The invention discloses a thunderstorm cloud point charge positioning altitude correction method based on three-dimensional atmospheric electric field measurement, and the method comprises the following steps: building a thunderstorm cloud point charge positioning altitude correction model, and defining correction parameters; then measuring a three-dimensional atmospheric electric field component by using a three-dimensional atmospheric electric field instrument; and finally, deducing a point charge coordinate calculation formula after altitude correction. Based on the indirect measurement error theory, the influence of the altitude of the position where the atmospheric electric field instrument is located on the thunderstorm cloud point charge positioning performance is researched, and the positioning error before and after correction is compared and analyzed. According to the method, errors of obtaining thunderstorm cloud azimuth data under a single atmospheric electric field instrument can be remarkably reduced in the field of thunderstorm monitoring, data prove that the method has better performance in practical application compared with the method before correction, the negative influence of the altitude on the thunderstorm cloud point charge positioning performance is reduced, and a new error compensation means is provided for thunderstorm cloud forecasting and early warning research.
Description
technical field [0001] The invention relates to a lightning detection method, in particular to a thunderstorm cloud point charge positioning altitude correction method based on three-dimensional atmospheric electric field measurement. Background technique [0002] In daily life, lightning rods can effectively reduce the economic losses caused by lightning disasters, but these belong to the category of passive lightning protection, and cannot accurately predict the time and location of lightning occurrence. In recent years, lightning warning technology has been developed rapidly. By analyzing the time-domain characteristics of the three-dimensional atmospheric electric field in sunny and thunderstorm weather, it provides a way to track the trajectory of thunderstorm clouds during the thunderstorm occurrence stage. However, existing research is promoting based on At the same time as the thunderstorm cloud detection work of the three-dimensional atmospheric electric field measu...
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IPC IPC(8): G01R35/00G01R29/08
CPCG01R35/005G01R29/0842G01R29/0892Y02A90/10
Inventor 杨旭庄玲李胤演行鸿彦
Owner NANJING UNIV OF INFORMATION SCI & TECH