ionosphere waveguide by an ELF source in the

using amplitude-modulated HF from ground an- tennas [Davis and Willis, 1974; Stubbe and Kopka,. 1977; Stubbe et al., 1981; Chang et al., 1982]. The HF...

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Jan 15, 2016 - auroral electrojet and relies on the modulation of the D/E-region conductivity as a response to modulated HF heating. The resulting modification of the electrojet current creates an effective antenna radiating at the modulation frequen

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Aug 20, 2009 - outcome); 2) the EC-17 Scale; and 3) the ACREU (Arthri- tis Community Research & Evaluation Unit) RA Knowl- edge Questionnaire.

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Apr 13, 2015 - coupled electron localization function (ELF) ab initio data with the bond charge model developed ... properties, and the ability of the electron localization function [14,15] to provide the required parameters ... a bond length RB = ν

d) Magnetic field measurements perpendicular to. B0 and pointing roughly eastward (By or B⊥). The red trace is from the fluxgate magnetometer and the black trace from the fluxgate magnetometer plus the search coil magnetometer. e) Ion energy spectr

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Nov 10, 2008 - The paper presents a notional account of the challenges facing the introduction of. English as an international lingua franca (ELF) curriculum in the state schools of the expanding circle, taking Greece as a case in point. It broadly d

Saturn's Ionosphere. L. MOORE. 1. , M. GALAND. 2. , A.J. KLIORE. 3. , A.F. NAGY. 4. , AND J. O'DONOGHUE. 5. 1. Center for Space Physics, Boston University, Boston,. MA, USA. 2 ... between a dense neutral atmosphere below and a tenuous, charged ......

[2] The generation of ELF/VLF waves by modulated HF ... conductivity changes in the D-region caused by HF heat- ... conductivity tensor of the ionosphere.

80 MHz pulse train. 1/80. PBS. BS. HWP1. HWP2. Prism. PPKTP. Fig. 1: Diagram of the experimental setup. A PPKTP waveguide is pumped with a pulsed laser, and the down-converted photons are spectrally analyzed using tunable filters and coincidence dete

experience periodic heating at the HF modulation. = (4) frequency. Since the ionospheric conductivity is electron temperature dependent, the conductivity This current is a source of -frequency radiation, under oes a similar periodic variation. Natura

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Jan 5, 1997 - e 0 and modes which violate this are not coupled efficiently. Assuming a single-mode waveguide, t&s relatron is satisfied for two of the modes. Therefore, only forward-to-backward coupling of guided-to-guided modes are considered and th

Oct 8, 1985 - r +1 each z, fi. )2_ 2E(fs(j)fs(j_1))- 2E(fs(j+1)fs(j+2)). It follows fromthe theorem of R. V. Erickson [4] that for. IE(exp izTo. I) exp(-z2/2)l < a31zlme3.