METHOD OF NOISE DETECTION IN MAGNETIC DATA

• Published in: Вестник КРАУНЦ. Физико-математические науки
• Main Authors: S.Y. Papsheva, O.V. Mandrikova, S.Y. Khomutov
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: KamGU by Vitus Bering 2019
• Subjects: noise in magnetic data; wavelet transform; Science; Q; Paratunka; Kamchatka
• Online Access: https://doi.org/10.26117/2079-6641-2019-29-4-87-97; https://doaj.org/article/754679563ce24bf4bc2ea98501c804c2

The method of detection of noise in magnetic data based on wavelet transformation and threshold functions is considered. Efficiency is shown by the results of analysis of fluxgate magnetometer FGE-DTU measurements at Observatory Paratunka, Kamchatka, IKIR FEB RAS. The noise from natural sources such as earthquakes in Kamchatka region and from artificial sources such as the vertical sounding of ionosphere by the ionosonde near Observatory is considered. Detailed time-frequency structure of noise in 2 Hz records of Z and D components is investigated. To automation the method for considered examples of noise the informative scale levels of wavelet-transformation are determined and parameters of threshold functions appreciated.