Results 31 to 40 of about 351,816 (303)

Methods and Algorithms of Subsurface Holographic Sounding

Remote Sensing, 2022
In our experiments, we develop and test portable multi-element receiver antenna arrays, electrically scanned in order to immediately obtain a recognizable image of subsurface objects.
A. V. Popov, A. E. Reznikov, A. I. Berkut, D. E. Edemsky, P. A. Morozov, I. V. Prokopovich   +5 more
doaj   +1 more source

Diagnostic study of geomagnetic storm-induced ionospheric changes over very low-frequency signal propagation paths in the mid-latitude D region [PDF]

Annales Geophysicae, 2022
We performed a diagnostic study of geomagnetic storm-induced disturbances that are coupled to the mid-latitude D region by quantifying the propagation characteristics of very low-frequency (VLF) radio signals from transmitters located in Cumbria, UK ...
V. U. J. Nwankwo, W. Denig, S. K. Chakrabarti, O. Ogunmodimu, O. Ogunmodimu, M. P. Ajakaiye, J. O. Fatokun, P. I. Anekwe, O. E. Obisesan, O. E. Oyanameh, O. V. Fatoye   +10 more
doaj   +1 more source

Analysis of ionospheric parameters during Solar events and geomagnetic storms

E3S Web of Conferences, 2016
The paper shows new methods of analysis of ionospheric and magnetic data applying the models of multicomponent constructions (MCM models) developed by the authors.
Mandrikova Oksana, Polozov Yury, Solovev Igor, Fetisova Nadezhda   +3 more
doaj   +1 more source

First results of atmospheric electricity measurements by CS110 electric field meter at Paratunka observatory, Kamchatka

E3S Web of Conferences, 2016
The results of continuous measurements of AEF potential gradient by CS110 fluxmeter at Paratunka observatory are presented.
Khomutov Sergey, Smirnov Sergey, Butin Stanislav, Babakhanov Ilkham   +3 more
doaj   +1 more source

An Underground Radio Wave Propagation Prediction Model for Digital Agriculture

Inf., 2019
Underground sensing and propagation of Signals in the Soil (SitS) medium is an electromagnetic issue. The path loss prediction with higher accuracy is an open research subject in digital agriculture monitoring applications for sensing and communications.
A. Salam
semanticscholar   +1 more source

Development of a methodology to estimate a region and waiting period for strong Kamchatka earthquakes based on seismic and ionospheric predictive signs [PDF]

E3S Web of Conferences, 2019
In this paper, an attempt is made to combine seismological and ionospheric predictive signs formed on the eve of earthquakes in order to develop a methodology for assessing the region and the time period of waiting for strong Kamchatka earthquakes with ...
Bogdanov Vadim, Pavlov Aleksey
doaj   +1 more source

Review of methodology to obtain parameters for radio wave propagation at low altitudes from meteorological data: New results for Auchi area in Edo State, Nigeria

Journal of King Saud University: Science, 2019
The surface refractivity, the refractivity gradient and effective earth radius factor (k-factor) are useful ingredients for predicting the local radio wave propagation conditions in the troposphere.
K. E. Ukhurebor, S. Azi
semanticscholar   +1 more source

Dynamics and spatio-temporal distribution of geomagnetic disturbances during periods of increased solar activity and magnetic storms [PDF]

E3S Web of Conferences, 2020
A detailed spatio-temporal analysis of magnetic data was performed during the periods of magnetic storms on October 02, 2013 and September 27, 2019 based on measurements of the station network.
Mandrikova Oksana, Rodomanskay Anastasia
doaj   +1 more source

Determining Wind Shear Threshold by Using Historical Sounding Data in Experimental Area

Atmosphere
This paper conducts a technical study on a method for determining the occurrence threshold of wind shear based on historical sounding data. After analyzing the impact of low-altitude wind shear on aircraft flight safety, a method for determining the ...
Tingting Shu, Qinglin Zhu, Xiang Dong, Houcai Chen, Leke Lin, Xuan Liu   +5 more
doaj   +1 more source

Magnetic location of a possible earthquake epicentre area: a mathematical model

Geomatics, Natural Hazards & Risk, 2016
We study one of the problems of the theory of seismo-electromagnetic methods of earthquake prediction, namely, the physical nature of magnetic location of a future epicentre.
O.B. Novik, S.V. Ershov, M.N. Volgin, A.O. Novik   +3 more
doaj   +1 more source