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35 papers · 2 filters
Variable phase propagation velocity for long-range lightning location system
Zhongjian Liu, Kuang Liang Koh, Andrew Mezentsev +3
The electromagnetic wave propagation velocity at low radio frequencies is an important input parameter for lightning location systems that use time of arrival (TOA) method. This ve…
Temporal characteristics and energy deposition of pulsating auroral patches
B. K. Humberset, J. W. Gjerloev, M. Samara +2
We present a careful statistical analysis of pulsating aurora (PA) using all-sky green line (557.7 nm) images obtained at 3.3 Hz. Six well-defined individual PA patches are identif…
Scintillation and irregularities from the nightside part of a Sun-aligned polar cap arc
Christer van der Meeren, Kjellmar Oksavik, Dag A. Lorentzen +2
In this paper we study the presence of irregularities and scintillation in relation to the nightside part of a long-lived, Sun-aligned transpolar arc on 15 January 2015. The arc wa…
Cutoff latitude variation during solar proton events: Causes and consequences
H. Nesse Tyssøy, J. Stadsnes
To accurately quantify the effect of solar proton events (SPEs) on the atmosphere requires a good estimate of the particle energy deposition in the middle atmosphere (60- 100 km) a…
North-South Asymmetries in Earth's Magnetic Field: Effects on High-Latitude Geospace
K. M. Laundal, I. Cnossen, S. E. Milan +5
The solar-wind magnetosphere interaction primarily occurs at altitudes where the dipole component of Earth's magnetic field is dominating. The disturbances that are created in this…
Sunlight effects on the 3D polar current system determined from low Earth orbit measurements
Karl M. Laundal, Christopher C. Finlay, Nils Olsen
Interaction between the solar wind and the Earth's magnetosphere is associated with large-scale currents in the ionosphere at polar latitudes that flow along magnetic field lines (…