Global ETD Search

71	Detection of solar flare induced ionospheric perturbations on narrowband VLF transmissions Gustafsson, Malin January 2011 (has links) Investigating solar flare induced perturbations on narrowband VLF transmissions is a way of performing research on the ionospheric D region without having to use in situ measurements which are limited in that part of the Earth’s atmosphere. A detection algorithm for solar flare induced perturbations on VLF signals was created with the purpose of obtaining the minimum detectable C class flare on these signals. The algorithm was applied to 2009–2010 data on five different transmission paths finding the minimum detectable flare to be C 1.4. Performing research on these five transmission paths also enabled analysis on which factors lead to the detectable flare perturbations in the VLF transmissions. The conclusion from this research is that it is not only the size of the solar flare that contributes to whether it is detectable on the VLF transmissions or not. The state of the local ionosphere during the perturbation is equally important. It showed that the noise level of the transmission paths is a dominant factor. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
72	Wave pulsations in the magnetosphere and their dependence on the solar wind Eriksson, Tommy January 2003 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
73	Filamentary structures in planetary nebulae Dahlgren, Hanna January 2005 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
74	Magnetospheric oscillations due to solar wind perturbations Sundberg, Torbjörn January 2005 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
75	Analysis of satellite measurements using artificial neural networks Hallström, Anders January 1997 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
76	A study of strong electric fields observed by Freja at low altitudes Forsberg, Peter January 1996 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
77	An analysis of the magnetometer data from the Auroral Turbulence rocket Smith, Gary January 1995 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
78	Wavelettransform med Morletwavelets för analys av satellitmätdata Margery, Philippe January 1994 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
79	Calculation of magnetospheric plasma density and temperature from probe current sweeps on the Swedish satellite Viking Nilsson, Krister January 1994 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik
80	Magnetfältssignaturer från Birkelands- och jonosfärsströmmar Sadigh, Babak January 1993 (has links) No description available. Fusion, Plasma and Space Physics Fusion, plasma och rymdfysik

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