Results 21 to 30 of about 2,135,092 (291)

Methods and Algorithms of Subsurface Holographic Sounding

open access: yesRemote 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   +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]

open access: yesAnnales 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   +10 more
doaj   +1 more source

Estimation earthquake occurrence probability in Kamchatka region based on seismological and complex of ionospheric precursors [PDF]

open access: yesEPJ Web of Conferences, 2021
In this paper the authors present the method of estimation of a region, waiting period and probability of strong earthquakes with KS ≥ 13.5 (M ≥ 6.0) in Kamchatka region based on the combination of mid-term and short-term predictive signs accompanying ...
Boganov Vadim, Pavlov Aleksey
doaj   +1 more source

Characterisation of millimetre wave multimode radio-over-fibre systems [PDF]

open access: yes, 2008
Millimetre wave radio-over-fibre links using both singlemode and multimode fibres are demonstrated over a 0-50 GHz bandwidth operating at 1550 nm. Results show that good link gain can be achieved with both single mode and multimode detectors.Millimetre ...
Cryan, MJ   +3 more
core   +1 more source

Analysis of ionospheric parameters during Solar events and geomagnetic storms

open access: yesE3S 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   +3 more
doaj   +1 more source

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

open access: yesE3S 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

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

open access: yesE3S Web of Conferences, 2016
The results of continuous measurements of AEF potential gradient by CS110 fluxmeter at Paratunka observatory are presented.
Khomutov Sergey   +3 more
doaj   +1 more source

RESULTS OF THE FIELD INTENSITY MEASUREMENT HF RADIO WAVES AT NIGHT ON BOARD THE "SOYA"

open access: yesAntarctic Record, 1963
This paper describes the result of the , field intensity measurement of HF waves which was carried out at night on the way from Tokyo to Cape Town on board the "SOYA".
Kazuo TANOHATA, Saburo ISHIKAWA
doaj   +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]

open access: yesE3S 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

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

open access: yesAtmosphere
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   +5 more
doaj   +1 more source

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