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Interpolation de niveaux d'exposition aux émissions radioélectriques in situ à l'aide de méthodes géostatistiques

Abstract : Radioelectric norms give different limit values of the radioelectric exposure. Exposure levels measured near radio and telecommunication antennas are very small compared to values recommended by the "International Commission on Non-Ionizing Radiation Protection". Today, persons near radio transmitters are seeking for the evaluation of exposure levels and the probability to exceed some threshold and not only the conformity to norms. Probabilistic framework with geostatistical methods is proposed that permits this evaluation. In this thesis we present an application of linear geostatistical methods, in particular the kriging method, for the estimation of the radioelectric levels of exposure starting from the output of a numerical model. The application of kriging with external drift to measurements obtained by a dosimeter is presented in this thesis. In these case studies, the Cauchy variogram model shows a good adequacy with the variability of the power density. A final application aims to evaluate the probability with which the exposure can exceed a determined threshold. We use two methods of non linear geostatistics, which require a Gaussian random function framework.. The practical implementation of these methods involves a transformation of the exposure to Gaussian values. A comparison between the probability of threshold exceedance obtained by application of the two methods on measurements is presented.
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Submitted on : Friday, February 22, 2008 - 8:00:00 AM
Last modification on : Thursday, September 24, 2020 - 4:34:05 PM
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  • HAL Id : pastel-00003423, version 1

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Yahya Ould Isselmou. Interpolation de niveaux d'exposition aux émissions radioélectriques in situ à l'aide de méthodes géostatistiques. domain_other. École Nationale Supérieure des Mines de Paris, 2007. Français. ⟨NNT : 2007ENMP1484⟩. ⟨pastel-00003423⟩

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