Blar i Department of Physics and Technology på forfatter "Nisi, Ragnhild Schrøder"
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An altitude and distance correction to the initial fluence distribution of TGFs
Nisi, Ragnhild Schrøder; Østgaard, Nikolai; Gjesteland, Thomas; Collier, Andrew B. (Peer reviewed; Journal article, 2014-10)The source fluence distribution of terrestrial gamma ray flashes (TGFs) has been extensively discussed in recent years, but few have considered how the TGF fluence distribution at the source, as estimated from satellite ... -
Meter-scale spark X-ray spectrum statistics
Carlson, Brant Edward; Østgaard, Nikolai; Kochkin, Pavlo; Grøndahl, Øystein; Nisi, Ragnhild Schrøder; Weber, Kristian; Scherrer, Zack; LeCaptain, Kristian (Peer reviewed; Journal article, 2015-11-13)X-ray emission by sparks implies bremsstrahlung from a population of energetic electrons, but the details of this process remain a mystery. We present detailed statistical analysis of X-ray spectra detected by multiple ...