Results 51 to 60 of about 3,039,671 (230)
Wave Propagation in Granular Materials [PDF]
, 2005 Wave propagation is a fundamental property of all physical systems. The wave speed is directly related to the compressibility of the system and determines the rate at which local disturbances are propagated into the bulk of the material.
Hostler, Stephen Richard
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Ionosphere disturbance during cosmodrome “Vostochniy” launches
E3S Web of Conferences, 2018 It is known that during spacecraft launches ionospheric plasma properties are modified in the result of impact of shock-acoustic waves generated during carrier rocket supersonic motion. As a rule, investigation of ionospheric plasma variations is carried
Dumbrava Zinaida F. +3 more
doaj +1 more source
Recurrent and sporadic Forbush decreases during solar cycles 23–24
Solar-Terrestrial Physics, 2019 A comparison has been made between recurrent (associated with high-speed streams from coronal holes) and sporadic (caused by interplanetary coronal mass ejections (ICMEs)) Forbush decreases (FDs) in solar cycles 23 and 24 (as well as in the maxima of ...
Melkumyan A.A. +6 more
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Radio wave propagation through the ionosphere [PDF]
, 2021 The non-transient plasma that is closest to Earth is found in the ionosphere at altitudes above approximately 60 km. It is observed either by ground-based, in-situ, or space-borne instrumentation and utilized to study and determine plasma phenomena and ...
Rexer, Theresa
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Airborne Ground Penetrating Radar, Field Test
Remote Sensing, 2021 Deployment of a ground penetrating radar (GPR) on a flying machine allows one to substantially extend the application area of this geophysical method and to simplify carrying out large surveys of dangerous and hard-to-reach terrain, where usual ground ...
Dmitry Edemsky +3 more
doaj +1 more source
Deformation-Electromagnetic Relations in Lithospheric Activity Manifestations
E3S Web of Conferences, 2018 It has been shown that dipole radiation of accelerated charges, described by Larmor relation, is the basis of the known mechanic-electromagnetic processes of rock deformation.
Larionov Igor +2 more
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Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity
Solar-Terrestrial Physics, 2017 We put forward a method of separating the geomagnetic activity contribution to the F2-layer critical frequency median, foF2med, at middle latitudes. It is based on the analysis of foF2, which is the ratio foF2med/foF2q in percent, where foF2q is the F2 ...
Deminov M.G. +3 more
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Investigation on radio wave propagation in shallow seawater: Simulations and measurements [PDF]
2016 IEEE Third Underwater Communications and Networking Conference (UComms), 2016 The authors present full wave simulations and experimental results of propagation of electromagnetic waves in shallow seawaters. Transmitter and receiver antennas are ten-turns loops placed on the seabed.
Eugenio Jiménez +7 more
semanticscholar +1 more source
Parabolic equation toolbox for radio wave propagation
, 2015 IEEE Antennas and Propagation Society; The Institute of Electrical and Electronics EngineersA parabolic equation toolbox (called PETOOL) has been developed in MATLAB with a user-friendly Graphical User Interface (GUI) for modeling radio-wave propagation ...
Apaydin, Gokhan +7 more
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Analysis of the ionospheric parameter dynamics on the basis of a generalized multicomponent model
E3S Web of Conferences, 2018 In the present paper, we have carried out an analysis of the ionospheric critical frequency data of the F2 layer during strong magnetic storms in 2017-2018. The ionospheric data of Paratunka (IKIR FEB RAS, Kamchatka, 53.0 N, 158.7 E), Wakkanai (Japan, 45.
Mandrikova Oksana +3 more
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