48
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246
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Astronomie
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Astrophysique
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Publications
48 publication(s) trouvée(s)
Article scientifique
Scintillation measurements at Bahir Dar during the high solar activity phase of solar cycle 24
Abstract. Small-scale ionospheric disturbances may cause severe radio scintillations of signals transmitted from global navigation satellite systems (GNSSs). Consequently, small-scale …
Article scientifique
Large-scale coordinated observations of Pc5 pulsation events
Abstract. HF (high-frequency) radars belonging to SuperDARN (Super Dual Auroral Radar Network) receive backscatter over substantial fields of view which, …
Article scientifique
Mapping of steady-state electric fields and convective drifts in geomagnetic fields – Part 2: The IGRF
Abstract. A method of mapping electric fields along geomagnetic field lines is applied to the IGRF (International Geomagnetic Reference Field) …
Article scientifique
Mapping of steady-state electric fields and convective drifts in geomagnetic fields – Part 1: Elementary models
Abstract. When studying magnetospheric convection, it is often necessary to map the steady-state electric field, measured at some point on …
Article scientifique
Spectral analysis of auroral geomagnetic activity during various solar cycles between 1960 and 2014
Abstract. In this paper we use wavelets and Lomb–Scargle spectral analysis techniques to investigate the changing pattern of the different …
Article scientifique
Property Rights in Space: Moving the Goal Posts so the Players don't Notice
Elsewhere in "Rethinking Terra Nullius and Property in Space", I have argued that due to the changing circumstances of access …
Article scientifique
Can the comprehensive model phase 4 (CM4) predict the geomagnetic diurnal field for days away from quiet time?
Abstract. The most recent comprehensive model (CM4) of the geomagnetic field (Sabaka et al., 2004) has been used in conjunction …
Article scientifique
Hydromagnetic waves in a compressed-dipole field via field-aligned Klein–Gordon equations
Abstract. Hydromagnetic waves, especially those of frequencies in the range of a few millihertz to a few hertz observed in …
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