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  • 1
    Electronic Resource
    Electronic Resource
    Polarization characteristics of ionospheric filtration of ULF waves (1983)
    Springer
    Studia geophysica et geodaetica 27 (1983), S. 285-297 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Резюме Пре¶rt;сmaвлен меmо¶rt; nолученuя nолярuэaцuонных хaрaкmерuсmuк (nолуосu nолярuзaцuонных эллunсов, nовором uх лaвноŭ nолуосu в сuсmеме коор¶rt;uнam, эллunmuчносmь u нanрaвленuе врaщенuя), коmорыŭ ¶rt;оnолняеm меmо¶rt;uку [1] мо¶rt;елuровaнuя uоносферноŭ фuльmрaцuu УНЧ-сu нaлa. Для nрuмерa nокaэaно nрuмененuе меmо¶rt;uкu в условuях мо¶rt;елu ¶rt;невноŭ uоносферы сре¶rt;нuх еомa нumных щuроm. Укaзывaюmся сnецuфuческuе явленuя в nолярuзaцuu мa нumноŭ u элекmрuческоŭ сосmaвляющuх волн енерuровaнных нa¶rt; верmuкaльно нео¶rt;норо¶rt;ноŭ (слоuсmоŭ) u aнuзоmроnноŭ uоносфероŭ u волн nроще¶rt;щuх к земноŭ nоверхносmu в зaвuсuмосmu оm uзмененuя мерu¶rt;uонaльно о у лa na¶rt;енuя волны с чaсmоmоŭ 0,3 Гц. Оmлuчumельнымu нanрaвленuямu рaсnросmрaненuя волн являюmся нanрaвленuе в¶rt;оль сuловых лuнuŭ внещне о мa нumно о nоля u нanрaвленuе верmuкaльное.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01592797
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  • 2
    Electronic Resource
    Electronic Resource
    On the possibilities of horizontal propagation ofPc1 pulsations in the ionosphere (1985)
    Springer
    Studia geophysica et geodaetica 29 (1985), S. 269-279 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary The vertical distribution of the contribution of the energy flux density due to the Alfvén(ordinary) wave, guided by the geomagnetic field(and propagating through the ionosphere to the Earth's surface) in the horizontal direction is demonstrated in the mechanism of the horizontal propagation of the Pc1 signal. The distribution with height is shown of the variations of the polarization characteristics of the propagating wave(e.g. the rotation of the polarization plane, changes in ellipticity, attenuation, etc.), which are the result of coupling in the denser layers of the low ionosphere in which also suitable isotropic(extraordinary) modes are generated. The results obtained using the method described in[4, 13] are demonstrated on a model of the daytime ionosphere under incidence of ordinaryL-modes, frequency f=0.3 Hz, and various meridional angles at the ionosphere.
    Notes: Резюме Для мехaнuзмaгорuзонmaльного рaсnросmрaненuя сuгнaлa Pc1 nокaзaно высоmное рaсnре¶rt;еленuе ¶rt;олu nлоmносmu mокa энергuu вгорuзонmaльном нanрaвленuu оmгеомaгнumным nолем nрове¶rt;еноŭ обыкновенноŭ Альвеновскоŭ волны, рaсnросmрaняющеŭся uоносфероŭ к земноŭ nоверхносmu. Тоже nокaзaно высоmное рaсnре¶rt;еленuе uзмененuŭ хaрaкmерuсmuк nолярuзaцuu рaсnросmрaняющеŭся волны(nоворaчuвaнuе nлоскосmu nолярuзaцuu, uзмененuя эллunmuчносmu, зamухaнuе u m.¶rt;.), коmорые являюmся сле¶rt;сmвuем взauмо¶rt;еŭсmвuя волны с nлaзмоŭ нuзщuх uоносферных слоёв. З¶rt;есь mожегенерuруюmся nо¶rt;хо¶rt;ящuе uзоmроnные(необыкновенные) волновые мо¶rt;ы. Резульmamы nрuобреmённые меmо¶rt;ом [4, 13] ¶rt;емонсmрuровaны в мо¶rt;елu ¶rt;невноŭ uоносферы nрu na¶rt;енuu нa uоносферу обыкновенныхL-мо¶rt;ов чaсmоmы f=0,3 Гц nо¶rt; рaзнымu мерu¶rt;uонaльнымu углaмu.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01638438
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  • 3
    Electronic Resource
    Electronic Resource
    Changes in the reflectivity of the midlatitude ionosphere with respect to the ULF (Pc1) signal (1988)
    Springer
    Studia geophysica et geodaetica 32 (1988), S. 84-100 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Description / Table of Contents: Summary The method of numerical modelling of ionospheric filtration of the Fourier components of a signal from the frequency range of Pc1 micropulsations is employed in the spectral analysis (frequency f, angle of incidence β) of the relative characteristic of the amplitude and energy reflectivity of the ionospheric layer with respect to ordinary Alfvén modes incident in the meridional plane. The results are presented for four different models characterizing the midlatitude day- and night-time ionosphere under low and high solar activity. The results indicate the specificity of filtration of ordinary Alfvén waves. It is proved that the lower region of the modelled ionosphere, as part of the midlatitude ionospheric wave guide (in particular the F2 layer), behaves like an Alfvén resonator in the given spectral range.
    Notes: Резюме Меmо¶rt;ом чuсленного мо¶rt;елuровaнuя uоносферноŭ фuльmрaцuu фурье-сосmaвляющuх сuгнaлa uз чaсmоmного ¶rt;uanaзонa мuкроnульсaцuŭ Рс1 nрово¶rtumся сnекmрaльныŭ aнaлuз (чaсmоma f, угол нa¶rt;енuя В) оmносumельноŭ aмnлumу¶rt;ноŭ u энергеmuческоŭ оmрaжaемосmu слоя uоносферы ¶rt;ля обыкновенных волновых мо¶rt;ов Альвенa, нa¶rt;aющuх нa uоносферу в мерu¶rt;uонaльноŭ nлоскосmu. Резульmamы nре¶rt;лaгaюmся ¶rt;ля чеmырех рaзных мо¶rt;елеŭ сре¶rt;нешuроmноŭ леmнеŭ ¶rt;невноŭ u ночноŭ uоносферы nрu нuзкоŭ u nрu возвышенноŭ солнечноŭ aкmuвносmu. Покaзывaеmся сnецuфuчносmь фuльmрaцuu обыкновенных волн Альвенa. Тоже nокaзaно, чmо нuзкaя облaсmь мо¶rt;елuровaнноŭ uоносферы (основнaя чaсmь F2-uоносферного сре¶rt;нешuроmного волново¶rt;a) ве¶rt;еm себя в сnекmрaльном ¶rt;uanaзоне кaк резонamор Альвенa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01629005
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  • 4
    Electronic Resource
    Electronic Resource
    Numerical modelling of the ionospheric filtration of an ulf micropulsation signal (1983)
    Springer
    Studia geophysica et geodaetica 27 (1983), S. 173-190 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Резюме Пре¶rt;сmaвлен эффекmuвныŭ aлгорumм, учumывaющuŭ влuянuе uоносферы нa nрохож¶rt;енuе УНЧ сuгнaлов. Ионосферa мо¶rt;елuруеmся в вu¶rt;е многослоŭноŭ сре¶rt;ы. Алгорumм uсnользовaн ¶rt;ля мо¶rt;елеŭ ¶rt;невноŭ u ночноŭ uоносферы сре¶rt;нuхгеомaгнumных щuроm. В зaвuсuмосmu оm углa na¶rt;енuя u чaсmоmы волны nокaзaны сnецuфuческuе особенносmu uоносферного фuльmрa (верmuкaльнaя оmрaжaемосmь нa высоmе 1000 км u uзмененuе nолноŭ aмnлumу¶rt;ы волны nрu nрохож¶rt;енuu с высоmы 1000 км нa nоверхносmь Землu) в ¶rt;невных u ночных условuях nрu na¶rt;енuu элкmронноŭ uлu uонноŭ мо¶rt;ы. Покaзaно, чmо вы¶rt;елгннымu нanрaвленuямu рaсnросmрaненuя являюmся нanрaвленuе в¶rt;оль внещнего мaгнumного nоля u в¶rt;оль nерnен¶rt;uкулярa к верхнеŭгрaнuце uоносферы. Вы¶rt;елгнносmь нanрaвленuŭ обусловленa aнuзоmроnuеŭ оmносumельно нanрaвленuя мaгнumного nоля u верmuкaльноŭ нео¶rt;нос¶rt;носmыо uоносферы.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01588990
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  • 5
    Electronic Resource
    Electronic Resource
    The ionosphere as an Alfven resonator in the Pc1 micropulsation range (1990)
    Springer
    Studia geophysica et geodaetica 34 (1990), S. 342-361 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary A local planar approximation of a stratified, inhomogeneous, anisotropic and dissipative ionosphere is presented as an Alfven quarter-wave plate resonator in the Pc1 micropulsation range. The frequency-amplitude structure of the resonance response of an isotropic Alfven wave on the Earth's surface and at a given altitude in the ionosphere is studied in comparison to standing waves in vacuum above an ideal conductor for a particular model of the ionosphere. An asymmetry in the response was found at both boundary of the resonator, at the Earth's surface and at the given altitude z0. The results are related to the vertical changes of frequency dispersion in the dissipative medium of the ionosphere and to the vertical profile of the inhomogeneities of the resonator being considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02316954
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  • 6
    Electronic Resource
    Electronic Resource
    Numerical solution to the problem of ionoshperic filtration of ULF waves in thePc1 range. the total wave field inside the ionospheric transition layer (1991)
    Springer
    Studia geophysica et geodaetica 35 (1991), S. 90-99 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary This article is a continuation of the methodological series of the author's papers[2–4] related to the problem of numerical modelling of ionospheric filtration of signals in the Pc1 range of micropulation frequencies. A matrix method of treating the total wave field within the ionospheric transition layer is presented in connection with the total wave fields determined at both boundaries of the ionospheric transition layer. The computation is based on the method of thin layers (homogeneous) in a finely stratified, inhomogeneous and anisotropic (magneto-active) ionosphere. The results can be used in constructing automated computation algorithms which add considerably to the applications of the method in question[2–4].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01628075
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  • 7
    Electronic Resource
    Electronic Resource
    Algorithm of the problem of simulating the total wave field of the geomagnetic pulsation signal within the ionospheric transition layer (1995)
    Springer
    Studia geophysica et geodaetica 39 (1995), S. 208-212 
    Details
    ISSN: 1573-1626
    Keywords: geomagnetic pulsations ; ionospheric filtration ; numerical simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary This supplement to paper by Prikner and Vagner (1991) describes the optimum algorithm for the automated computer program of numerical simulation of the total wave field anywhere within the ionospheric filter. The matrix method of thin layers in an inhomogeneous, anisotropic and dissipative ionosphere has been applied. The application of this method enables in situ measurements of geomagnetic pulsations in the ionosphere to be compared with the results of the numerical simulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02296076
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  • 8
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    The ionosphere as an Alfven resonator in the Pc1 micropulsation range (1990)
    Springer
    Details
    Publication Date: 1990-10-01
    Print ISSN: 0039-3169
    Electronic ISSN: 1573-1626
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Published by Springer
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  • 9
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    Changes in the reflectivity of the midlatitude ionosphere with respect to the ULF (Pc1) signal (1988)
    Springer
    Details
    Publication Date: 1988-03-01
    Print ISSN: 0039-3169
    Electronic ISSN: 1573-1626
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Published by Springer
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  • 10
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    On the possibilities of horizontal propagation ofPc1 pulsations in the ionosphere (1985)
    Springer
    Details
    Publication Date: 1985-09-01
    Print ISSN: 0039-3169
    Electronic ISSN: 1573-1626
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Published by Springer
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