Konferanseforedrag
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Øystein Håvard Færder; Nikolai Grigorievich Lehtinen; David Alexandre Stephan Sarria
et al. (2025). A parameter-space exploration of the Relativistic Discharge Model mapping for which conditions ALOFT’s Flickering Gamma-ray Flashes are produced. (ekstern lenke)
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Stein Håland; Nikolai Østgaard; Johan Stadsnes
et al. (2000). Comparison of energy spectra in the ionosphere and in the central plasma sheet during a magnetospheric substorm. (ekstern lenke)
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Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). Auroral conjugacy studies. (ekstern lenke)
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Nikolai Østgaard
(2006). Remote sensing of X rays to study characteristics of electron precipitation. (ekstern lenke)
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Nikolai Østgaard
(2007). IPY-ICESTAR. (ekstern lenke)
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Nikolai Østgaard; A.L. Borg; Arne Åsnes
et al. (2007). What are the ionospheric signatures of magnetotail reconnection?. (ekstern lenke)
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T.J. Immel; Nikolai Østgaard; D.J. Strickland
et al. (2004). IMAGE-FUV observations of the October-November 2003 flare and magnetic storm effects on Earth. (ekstern lenke)
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H.U. Frey; G. Haerendel; S.B. Mende
et al. (2004). Sub-Auroral Morning Proton Spots (SAMPS) as a result of plasmapause-ring-current interaction. (ekstern lenke)
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Nikolai Østgaard
(2007). Conjugate studies. (ekstern lenke)
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Johan Stadsnes; Jon Bjordal; Nikolai Østgaard
et al. (2000). Temporal and Spatial Features of the Energetic Electron Precipitation During Substorms. (ekstern lenke)
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Nikolai Østgaard; Johan Stadsnes; Jon Bjordal
et al. (2000). Global energy input derived from UVI and PIXIE. (ekstern lenke)
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Jone Peter Reistad; Karl Magnus Laundal; Nikolai Østgaard
et al. (2018). Plasma circulation inside the polar cap and lobe reconnection. (ekstern lenke)
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Nikolai Østgaard; Johan Stadsnes; G. Germany
et al. (2000). Energy Analysis of an Isolated Substorm Based on Remote Sensing Techniques. (ekstern lenke)
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Johan Stadsnes; Jon Bjordal; Nikolai Østgaard
et al. (2000). Temporal and Spatial Features of the Energetic Electron Precipitation During Substorms. (ekstern lenke)
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J. Montanya; F Fabro; O van der Velde
et al. (2014). Lightning activity and radar for a TGF case in Colombia. (ekstern lenke)
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Nikolai Østgaard
(2024). TGF and gamma-ray glow highlights from the ALOFT 2023 flight campaign. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Brant Edward Carlson
et al. (2014). First simultaneous observations of optical lightning and terrestrial gamma flash from space. (ekstern lenke)
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Andrew Mezentsev; Nikolai Østgaard; Thomas Gjesteland
et al. (2015). VLF sferics associated with TGFs. (ekstern lenke)
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Andrew B. Collier; Thomas Gjesteland; Nikolai Østgaard
(2011). Terrestrial Gamma-ray Flash Intensity Distribution. (ekstern lenke)
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J-B Renard; J. Pincon; Nikolai Østgaard
et al. (2011). Imapct of recent results About TGFs and TLEs to the scientific return OF the cobrat project. (ekstern lenke)
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Kristian Snekvik; Karl Magnus Laundal; Nikolai Østgaard
et al. (2015). Magnetic field patterns near the polar cap boundary. (ekstern lenke)
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Nikolai Østgaard; Ragnhild Schrøder Hansen; Thomas Gjesteland
et al. (2011). Occurence frequency and fluence of TGFs. (ekstern lenke)
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Michael Hesse; M Kuznetsova; Yi-Hsin Liu
et al. (2017). The roles of IMF By, dipole tilt, and conductance differences in establishing nonconjugate auroral features. (ekstern lenke)
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Michael Hesse; Eigil Friis-Christensen; T Moretto
et al. (2017). Does the Magnetosphere go to Sleep?. (ekstern lenke)
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Nikolai Østgaard; Brant Edward Carlson; Thomas Gjesteland
et al. (2015). Search for relativistic electrons in laboratory discharge experiments. (ekstern lenke)
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Karl Magnus Laundal; N Olsen; C Finlay
et al. (2015). Statistical maps of Birkeland currents from Swarm magnetometer measurements. (ekstern lenke)
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Linga Reddy Cenkeramaddi; Georgi Genov; Anja Kohfeldt
et al. (2012). Low-energy CZT detector array for the ASIM mission. (ekstern lenke)
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Karl Magnus Laundal; Christopher C. Finlay; NIls Olsen
et al. (2017). Characterizing external influence on the large-scale polar ionospheric current system. (ekstern lenke)
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Karl Magnus Laundal; Jone Peter Reistad; Paul Tenfjord
et al. (2017). Seasonal and IMF-controlled variations in the large-scale true horizontal ionospheric current. (ekstern lenke)
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Jone Peter Reistad; Karl Magnus Laundal; Anders Ohma
et al. (2019). A new way to identify and quantify the sources of ionospheric convection. (ekstern lenke)
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Nikolai Østgaard; Karl Magnus Laundal
(2008). Auroral conjugacy studies. (ekstern lenke)
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Marianne Daae; Nikolai Østgaard; W Lewis
(2008). Undulations on the equatorial edge of the auroral oval in the dusk sector. (ekstern lenke)
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Nikolai Lehtinen; Umran S. Inan; Nikolai Østgaard
(2014). On the Spatial Scale of Streamers. (ekstern lenke)
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Camilla Sætre; Johan Stadsnes; Arve Aksnes
et al. (2004). The impact of energetic electron precipitation on nitric oxide in the upper atmosphere - Including neutral wind effects. (ekstern lenke)
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Anders Ohma; Nikolai Østgaard; Jone Peter Reistad
et al. (2019). How Asymmetries in Geospace Evolve During Substorms. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Karl Magnus Laundal
et al. (2013). Simultaneous global imaging as a tracer of true conjugate regions. (ekstern lenke)
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Arve Aksnes; Johan Stadsnes; Jon Bjordal
et al. (2000). Global Conductivity Maps Derived From Polar PIXIE Observations. (ekstern lenke)
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Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2005). Global imaging of Auroral Phenomena in the Conjugate Hemispheres. (ekstern lenke)
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Nikolai Østgaard; Johan Stadsnes; J. Moen
et al. (2005). A double spacecraft imaging mission to study reconnection and ion outflow. (ekstern lenke)
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Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). Hemispherical asymmetries derived from conjugate auroral imaging. (ekstern lenke)
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A. Bhardwaj; Nikolai Østgaard
(2007). olar System X-rays: Relationship with Solar X-rays and Solar Wind. (ekstern lenke)
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Nikolai Østgaard
(2005). Conjugate auroral observations, Now and in the future. (ekstern lenke)
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Nikolai Østgaard; Johan Stadsnes; T Gjesteland
et al. (2006). TGF production altitude - revisiting the BATSE spectra in view of upcoming missions. (ekstern lenke)
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Nikolai Østgaard; K Kauristi; A.T. Weatherwax
(2006). ICESTAR A connection between IHY and IPY. (ekstern lenke)
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Nikolai Østgaard; T.J. Immel
(2006). Global imaging to predict space weather. (ekstern lenke)
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Anders Groth Helland; Nikolai Østgaard; Kjetil Ullaland
et al. (2007). ASIM. (ekstern lenke)
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Johan Stadsnes; Jon Bjordal; Nikolai Østgaard
et al. (2000). Temporal and Spatial Features of the Energetic Electron Precipitation During Substroms. (ekstern lenke)
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Anders Ohma; Nikolai Østgaard; Jone Peter Reistad
et al. (2020). How tail reconnection affects the asymmetric state of the magnetosphere in the LFM model. (ekstern lenke)
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N. A. Kelley; David M. Smith; G. S. Bowers
et al. (2014). Recent Results from ADELE and RHESSI. (ekstern lenke)
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N. A. Kelley; David M. Smith; G. S. Bowers
et al. (2013). Recent Results from ADELE and RHESSI. (ekstern lenke)
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Stein Egil Håland; Finn Søraas; P. Daly
et al. (2011). Determination of polar cap size and shape using energetic particles. (ekstern lenke)
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Nikolai Østgaard
(2011). Auroral asymmetries in the conjugate hemispheres. (ekstern lenke)
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Nikolai Østgaard; Karl Magnus Laundal; Johan Stadsnes
(2011). Auroral asymmetries in the conjugate hemispheres. (ekstern lenke)
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H.U. Frey; C Chaston; S Fu
et al. (2009). Auroral Small-and Meso-Scale Structures, Origin and Function. (ekstern lenke)
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Paul Tenfjord; Nikolai Østgaard; Stein Haaland
et al. (2015). On which timescales are By induced in the closed magnetosphere?. (ekstern lenke)
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Nikolai Østgaard
(2017). Norwegian contributions to SCOSTEP/VarSITI. (ekstern lenke)
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Nikolai Østgaard
(2017). Conjugate auroral imaging: How asymmetric can geospace be ? Magnetic storm 17 aug 2001. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Paul H. Connell
et al. (2009). Analysis of BATSE TGFs taking instrumental limitations into account. (ekstern lenke)
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Johan Stadsnes; Nikolai Østgaard; Camilla Sætre
et al. (2006). Global observations of the dynamics of energetic electron precipitation during substorms. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard
(2017). Norwegian contributions to the ISWI program. (ekstern lenke)
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Nikolai Østgaard
(2013). Nye fenomener i romforskning - gammaglimt, blå jetter og røde ånder. (ekstern lenke)
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Alexander Broberg Skeltved; Nikolai Østgaard; Brant Edward Carlson
et al. (2013). A study of the relativistiv runaway electron avalanche and the feedback theories to explain terrestrial gammaray production. (ekstern lenke)
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Nikolai Østgaard; Karl Magnus Laundal
(2009). Asymmetric aurora detected in the two hemispheres simultaneously. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Paul H. Connell
et al. (2008). Analysis of a subset of BATSE TGFs that do not suffer from instrumental limitations. (ekstern lenke)
-
Nikolai Lehtinen; Umran S. Inan; Nikolai Østgaard
(2014). On the spatial scale of streamers. (ekstern lenke)
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Nikolai Østgaard; Arne Åsnes; A. Pedersen
et al. (2008). What are the ionospheric signatures of magnetotail reconnection?. (ekstern lenke)
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Nikolai Lehtinen; Nikolai Østgaard; Umran S. Inan
(2014). Dynamics of a streamer structure. (ekstern lenke)
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Ragnhild Schrøder Nisi; Nikolai Østgaard; Thomas Gjesteland
(2014). An altitude and distance correction to the initial fluence distribution of TGF. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Hugh Christian
et al. (2015). The sequence of events in a lightning stroke: terrestrial gamma ray flash, radio signal and optical lightning.. (ekstern lenke)
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Andrew B. Collier; Thomas Gjesteland; Nikolai Østgaard
(2013). Intensity of Lightning Associated with TGFs. (ekstern lenke)
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Nikolai Østgaard
(2024). TGF and gamma-ray glow highlights from the ALOFT 2023 flight campaign. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Brant Edward Carlson
et al. (2015). Simultaneous observations of optical lightning and terrestrial gamma flash and radio signals on ground. (ekstern lenke)
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Hilde Nesse; Johan Stadsnes; Larry Paxton
et al. (2004). Effects on the O/N2-ratio caused by energetic electron precipitation during storms. (ekstern lenke)
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Stein Håland; Nikolai Østgaard; Jon Bjordal
et al. (2000). Energetic Particle Signatures of Reconnection and Plasmoid Formation in the Magnetotail. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Andrew B. Collier
(2011). Constrains on the Terrestrial Gamma-ray Flashes Emission Cone by Spectral Analysis of Geolocated Events. EGU. (ekstern lenke)
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Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). ICESTAR: Auroral conjugacy studies. (ekstern lenke)
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Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). Auroral conjugacy studies based on global imaging. (ekstern lenke)
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Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). Substorm onset asymmetries derived from conjugate auroral imaging. (ekstern lenke)
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Jone Peter Reistad; Stein Haaland; Nikolai Østgaard
et al. (2013). Investigation of the role of IMF Bx on magnetopause characteristic past the terminator. (ekstern lenke)
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Kjartan Olafsson; Nikolai Østgaard; Eija Irene Tanskanen
(2007). The Spce Suitcase - instruments for exploring the near-Earth space from the classroom. (ekstern lenke)
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A. L Borg; Nikolai Østgaard; A. Pedersen
(2005). Studies of an X-line passage 2 October 2002 using multipoint Cluster and Polar imaging data,. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard
(2007). Solar wind pressure as a cause for persistent proton precipitation. (ekstern lenke)
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T. Stubbs; Richard R. Vondrak; Nikolai Østgaard
et al. (2004). Simultaneous observations of the auroral oval in both hemispheres under various conditions. (ekstern lenke)
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Nikolai Østgaard; Johan Stadsnes; Jon Bjordal
et al. (2000). Global energy input derived from UVI and PIXIE. (ekstern lenke)
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Anders Ohma; Nikolai Østgaard; Jone Peter Reistad
et al. (2019). How asymmetries in Geospace evolve during increased tail reconnection. (ekstern lenke)
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Nikolai Østgaard
(2013). UV and X-ray imaging of aurora and other atmospheric phenomena. (ekstern lenke)
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Nikolai Østgaard; Brant Edward Carlson; Øystein Grøndahl
et al. (2014). Search for X-rays and relativistic electrons in laboratory discharge experiments. (ekstern lenke)
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Nikolai Østgaard
(2014). TGF observations. (ekstern lenke)
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Stein Haaland; Bjørn Lybekk; Lukas Maes
et al. (2017). North-South asymmetries in cold plasma density. (ekstern lenke)
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David M. Smith; P Buzbee; A Infanger
et al. (2013). Results from the third RHESSI catalog of Terrestrial Gamma-ray Flashes. (ekstern lenke)
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Nikolai Lehtinen; Nikolai Østgaard
(2015). Dimension of a fractal streamer structure. (ekstern lenke)
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Nikolai Østgaard
(2011). The global auroral response to solar wind - Earth magnetosphere coupling. (ekstern lenke)
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Brant Edward Carlson; G Fishman; M. S. Briggs
et al. (2011). Modeling TGF electron beams and constraints on the TGF source. (ekstern lenke)
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Karl Magnus Laundal; Matthias Förster; Stein Haaland
et al. (2015). Effects of electric field component representation on estimated cross polar cap potential - Implications for interhemispheric asymmetries. (ekstern lenke)
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Mike Liemohn; Pontus Brandt; Mike Denton
et al. (2009). Go With the Flow: The Reductionist View of Geospace at the System Level. (ekstern lenke)
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Nikolai Østgaard; Beate Krøvel Humberset; Liisa Juusola
et al. (2011). Asymmetries of substorm onset location and the dynamic behavior of auroral substorms during expansion phase. (ekstern lenke)
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Olaf Amm; Arve Aksnes; Johan Stadsnes
et al. (2004). Observations and analysis of ionospheric electrodynamics during a substorm recovery phase using the MIRACLE network. (ekstern lenke)
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Nikolai Østgaard; Ragnhild Schrøder Hansen; Thomas Gjesteland
et al. (2011). Occurence frequency and fluence of TGFs. (ekstern lenke)
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Nikolai Østgaard
(2015). How is Earth coupled to space?. (ekstern lenke)
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Nikolai Østgaard; Beate Krøvel Humberset; Karl Magnus Laundal
et al. (2011). Auroral asymmetries in the conjugate hemispheres during substorm onset and expansion phase. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Martino Marisaldi
et al. (2013). Terrestrial Gamma ray Flashes observed over low clod tops. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Brant Edward Carlson
et al. (2015). Simultaneous observations of optical lightning and terrestrial gamma flash from space and radio signals on ground. (ekstern lenke)
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Yngve Skogseide; Linga Reddy Cenkeramaddi; Georgi Genov
et al. (2012). BGO front-end electronics and signal processing in the MXGS instrument for the ASIM mission. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard
(2008). Conjugate imaging of substorms. (ekstern lenke)
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Karl Magnus Laundal; Christopher C. Finlay; NIls Olsen
et al. (2017). North-south asymmetries in polar ionospheric currents - effects of asymmetries in the main magnetic field. (ekstern lenke)
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Camilla Sætre; Johan Stadsnes; Nikolai Østgaard
(2005). Kjemiske effekter av elektronnedbør i den lavere termosfæren. (ekstern lenke)
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Mike Liemohn; Nikolai Østgaard; Jone Peter Reistad
et al. (2013). Defining and Resolving Current Systems in Geospace. (ekstern lenke)
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Nikolai Østgaard; Karl Magnus Laundal
(2009). Asymmetric aurora detected in the two hemispheres simultaneously. (ekstern lenke)
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Kjartan Olafsson; Nikolai Østgaard
(2008). The Space Science Suitcase Instruments for Exploring Space Weather From the Classroom. (ekstern lenke)
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Kristian Snekvik; Liisa Juusola; Olaf Amm
et al. (2009). Reconnection Hall current system observed in the magnetotail and in the ionosphere. (ekstern lenke)
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Jone Peter Reistad; Stein Haaland; Nikolai Østgaard
et al. (2013). Investigation of a possible IMF Bx influence on magnetopause characteristics. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Johan Stadsnes
et al. (2008). The production altitude and time delays of the terrestrial gamma flashes - revisiting the BATSE spectra. (ekstern lenke)
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Nikolai Østgaard
(2013). Scientific Programme of Birkeland Centre in Space Physics. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard; Jone Peter Reistad
et al. (2013). Non-Conjugate Features in the Auroral Ovals in the two Hemispheres. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Andrew B. Collier
et al. (2013). Terrestrial Gamma ray Flashes observed over low clod tops. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Brant Edward Carlson
et al. (2013). First simultaneous observations of optical lightning and terrestrial gamma flash from space. (ekstern lenke)
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Johan Stadsnes; Arve Aksnes; Camilla Sætre
et al. (2008). Observations of energetic particle precipitation and effects on the mesosphere and lower thermosphere. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Karl Magnus Laundal
et al. (2014). Asymmetric Solar Wind dynamo efficiency and IMF Bx. (ekstern lenke)
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Stein Håland; Nikolai Østgaard; Jon Bjordal
et al. (2000). Energetic Particle Signatures of Reconnection and Plasmoid Formation in the Magnetotail. (ekstern lenke)
-
Thomas Gjesteland; Nikolai Østgaard; Andrew B. Collier
(2011). Constrains on the Terrestrial Gamma-ray Flashes Emission Cone by Spectral Analysis of Geolocated Events. EGU. (ekstern lenke)
-
Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). ICESTAR: Auroral conjugacy studies. (ekstern lenke)
-
Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). Auroral conjugacy studies based on global imaging. (ekstern lenke)
-
Nikolai Østgaard; S.B. Mende; H.U. Frey
et al. (2006). Substorm onset asymmetries derived from conjugate auroral imaging. (ekstern lenke)
-
Jone Peter Reistad; Stein Haaland; Nikolai Østgaard
et al. (2013). Investigation of the role of IMF Bx on magnetopause characteristic past the terminator. (ekstern lenke)
-
Kjartan Olafsson; Nikolai Østgaard; Eija Irene Tanskanen
(2007). The Spce Suitcase - instruments for exploring the near-Earth space from the classroom. (ekstern lenke)
-
A. L Borg; Nikolai Østgaard; A. Pedersen
(2005). Studies of an X-line passage 2 October 2002 using multipoint Cluster and Polar imaging data,. (ekstern lenke)
-
Nikolai Østgaard; A.L. Borg; Arne Åsnes
et al. (2007). What are the ionospheric signatures of magnetotail reconnection?. (ekstern lenke)
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Astrid Orr; Nikolai Østgaard
(2007). ESA's Atmosphere-Space Interactions Monitor (ASIM) for the ISS. (ekstern lenke)
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G.r. Gladstone; R.F. Elsner; A. Bhardwaj
et al. (2004). Chandra observations of soft X-ray emissions from Earth and Jupiter. (ekstern lenke)
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Brant Edward Carlson; Z Scherre; K Webere
et al. (2013). Spatial Correlations and Distributions in Energetic Electron Production by MeterScale Sparks. (ekstern lenke)
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Nikolai Østgaard
(2023). The ALOFT mission: a flight campaign for TGF and gamma-ray glow observations over Central America and the Caribbean in July 2023. (ekstern lenke)
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Stein Haaland; Karl Magnus Laundal; Bjørn Lybekk
et al. (2017). North-south asymmetries in lobe density:
Cluster observations. (ekstern lenke)
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Stein Haaland; Lisa Baddeley; Kjartan Olafsson
et al. (2017). Looking South for the Northern Lights:Substorm Physics as
University Curriculum. (ekstern lenke)
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Andrew Infanger; David M. Smith; Thomas Gjesteland
et al. (2014). Toward an optimized Third Catalog of RHESSI TGFs. (ekstern lenke)
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Paul Tenfjord; Kristian Snekvik; Nikolai Østgaard
et al. (2015). Generation of Birkeland Currents during IMF By; Mechanisms and theory. (ekstern lenke)
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Alexander Broberg Skeltved; Nikolai Østgaard; Thomas Gjesteland
et al. (2015). Modeling the production and acceleration of runaway electrons in strong inhomogeneous electric fields with GEANT4. (ekstern lenke)
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Y. Khotyaintsev; A Retino; Andris Vaivads
et al. (2011). Particle Acceleration During Solar Flares and Magnetospheric Substorms. (ekstern lenke)
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Brant Edward Carlson; Thomas Gjesteland; Nikolai Østgaard
(2011). The TGF source luminosity distribution. (ekstern lenke)
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Theresa Rexer; Nikolai Østgaard; Jone Peter Reistad
et al. (2015). Current systems associated with Non-Conjugate Aurora. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Paul H. Connell
et al. (2009). Analysis of a subset of BATSE TGFs that do not suffer from instrumental limitations. (ekstern lenke)
-
Karl Magnus Laundal; Nikolai Østgaard
(2009). IPY-ICESTAR Arctic Frontiers. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Paul Tenfjord
et al. (2015). Are there auroral signatures related to asymmetric generation of field-aligned currents in the tail due to an IMF By induced twist?. (ekstern lenke)
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Arve Aksnes; Johan Stadsnes; Nikolai Østgaard
et al. (2005). Height profiles of the ionospheric electron density derived from remote sensing of UV and X-ray emissions and measurements by the EISCAT radar: A comparison. (ekstern lenke)
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Camilla Sætre; Johan Stadsnes; Nikolai Østgaard
et al. (2005). Chemical effects of electron precipitation: Nitric Oxide in the lower thermosphere. (ekstern lenke)
-
Nikolai Østgaard
(2013). Terrestrial gamma ray flashes, the most energetic photon phenomenon in our atmosphere. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Karl Magnus Laundal
et al. (2014). Conjugate and non-conjugate aspects of the aurora. (ekstern lenke)
-
Nikolai Østgaard
(2013). Terrestrial Gamma-ray Flashes - the most energetic photon phenomenon in our atmosphere. (ekstern lenke)
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T Neubert; V Reglero; Nikolai Østgaard
et al. (2009). The ASIM Mission for Studies of Severe Thunderstorms,. (ekstern lenke)
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Nikolai Østgaard
(2013). Terrestrial gamma ray flashes, the most energetic photon phenomenon in our atmosphere. (ekstern lenke)
-
Thomas Gjesteland; Nikolai Østgaard; Paul H. Connell
et al. (2008). Monte Carlo simulation of the temporal behavior of Terrestrial Gamma ray Flashes. (ekstern lenke)
-
Alexander Broberg Skeltved; Nikolai Østgaard; Brant Edward Carlson
et al. (2014). A study of the runaway relativistic electron avalanche and the feedback theory using GEANT4. (ekstern lenke)
-
Nikolai Østgaard; Brant Edward Carlson; Øystein Grøndahl
et al. (2014). Search for X-rays and relativistic electrons in laboratory discharge experiments. (ekstern lenke)
-
Thomas Gjesteland; Nikolai Østgaard; Paul H. Connell
et al. (2008). Monte Carlo simulation of the temporal behavior of Terrestrial Gamma ray Flashes and analysis of the BATSE measurements. (ekstern lenke)
-
Thomas Gjesteland; Nikolai Østgaard; Johan Stadsnes
et al. (2008). The production altitude and time delays of the terrestrial gamma flashes - revisiting the BATSE spectra. (ekstern lenke)
-
Vegard Aamodt; Nikolai Østgaard; Thomas Gjesteland
et al. (2014). Search for Terrestrial Electron Beams (TEB) in SAMPEX data. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Ragnhild Schrøder Nisi
et al. (2014). Twelve Years of RHESSI TGFs - The second RHESSI TGF catalog. (ekstern lenke)
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Anders Ohma; Nikolai Østgaard; Jone Peter Reistad
et al. (2019). Observations of Asymmetric Lobe Convection for Weak and Strong Tail Reconnection. (ekstern lenke)
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David Sarria; Nikolai Østgaard; Pavlo Kochkin
et al. (2019). The First Terrestrial Electron Beam Observed by the Atmosphere‐Space Interactions Monitor (ASIM), EGU 2019 Presentation.. (ekstern lenke)
-
Nikolai Østgaard
(2013). Terrestrial Gamma-ray Flashes - the most energetic photon phenomenon in our atmosphere. (ekstern lenke)
-
Thomas Gjesteland; Nikolai Østgaard; Andrew B. Collier
et al. (2011). Confining the angular distribution of TGF emission. (ekstern lenke)
-
Brant Edward Carlson; Thomas Gjesteland; Nikolai Østgaard
(2011). The frequency of terrestrial gamma-ray flash electron beam observations. (ekstern lenke)
-
Arve Aksnes; Johan Stadsnes; Nikolai Østgaard
et al. (2005). Ionospheric global conductance maps from remote sensing of UV and X-ray emissions. (ekstern lenke)
-
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Ingrid Bjørge-Engeland; Nikolai Østgaard; Andrey Mezentsev
et al. (2022). Terrestrial Gamma-Ray Flashes With Accompanying Elves Detected by ASIM. (ekstern lenke)
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S. Soler; F.J. Pérez-Invernón; F.J. Gordillo-Vázquez
et al. (2020). Blue optical observations of narrow bipolar events by ASIM suggest corona streamer activity in thunderstorms. (ekstern lenke)
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Lasse Skaaning Husbjerg; Torsten Neubert; Olivier Chanrion
et al. (2023). Characterization of Thunderstorm Cells Producing Observable Terrestrial Gamma-Ray Flashes. (ekstern lenke)
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Carl Budtz-Jorgensen; Irfan Kuvvetli; Yngve Skogseide
et al. (2009). Characterization of CZT Detectors for the ASIM Mission. (ekstern lenke)
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Martino Marisaldi; Andrea Argan; Alessandro Ursi
et al. (2015). Enhanced detection of terrestrial gamma-ray flashes by AGILE. (ekstern lenke)
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Christoph Köhn; Matthias Heumesser; Olivier Chanrion
et al. (2024). Employing optical lightning data to identify lightning flashes associated to terrestrial gamma-ray flashes. (ekstern lenke)
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Alexander Broberg Skeltved; Nikolai Østgaard; Brant Edward Carlson
et al. (2015). Modeling the relativistic runaway electron avalanche and the feedback mechanism with GEANT4. (ekstern lenke)
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Kristian Snekvik; Rumi Nakamura; Nikolai Østgaard
et al. (2008). The Hall current system revealed as a statistical significant pattern during fast flows. (ekstern lenke)
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Kristian Snekvik; Stein Haaland; Nikolai Østgaard
et al. (2007). Cluster observations of a field aligned current at the dawn flank of a bursty bulk flow. (ekstern lenke)
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Ingrid Bjørge-Engeland; Nikolai Østgaard; David Alexandre Stephan Sarria
et al. (2024). Evidence of a New Population of Weak Terrestrial Gamma-Ray Flashes Observed From Aircraft Altitude. (ekstern lenke)
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Kjartan Olafsson; Nikolai Østgaard; Eija Irene Tanskanen
(2009). The Space Science Suitcase - Instruments for Exploring Near-Earth Space from the Classroom. (ekstern lenke)
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Paul Tenfjord; Nikolai Østgaard; Kristian Snekvik
et al. (2015). How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patternsin the two hemispheres. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard; H. U. Frey
et al. (2010). Seasonal and interplanetary magnetic field-dependent polar cap contraction during substorm expansion phase. (ekstern lenke)
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Stein Haaland; Bjørn Lybekk; Lukas Maes
et al. (2017). North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations. (ekstern lenke)
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David Sarria; Pavlo Kochkin; Nikolai Østgaard
et al. (2019). The First Terrestrial Electron Beam Observed by the Atmosphere-Space Interactions Monitor. (ekstern lenke)
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Francisco J. Pérez-Invernón; Francisco J. Gordillo-Vázquez; María Passas-Varo
et al. (2022). Multispectral Optical Diagnostics of Lightning from Space. (ekstern lenke)
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Dongshuai Li; Torsten Neubert; Lasse Skaaning Husbjerg
et al. (2023). Observation of Blue Corona Discharges and Cloud Microphysics in the Top of Thunderstorm Cells in Cyclone Fani. (ekstern lenke)
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Liisa Juusola; Nikolai Østgaard; Eija Irene Tanskanen
(2011). Statistics of plasma sheet convection. (ekstern lenke)
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Stephen Eric Milan; Lasse Boy Novock Clausen; John Charles Coxon
et al. (2017). Overview of solar wind - magnetosphere - ionosphere - atmosphere coupling and the generation of magnetospheric currents. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Paul H. Connell
et al. (2010). Effects of dead time losses on terrestrial gamma ray flash measurements with the Burst and Transient Source Experiment. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Brant Edward Carlson
et al. (2013). Simultaneous observations of optical lightning and terrestrial gamma ray flash from space. (ekstern lenke)
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H. U. Frey; O. Amm; C. C. Chaston
et al. (2010). Small and meso-scale properties of a substorm onset auroral arc. (ekstern lenke)
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T. Stubbs; Richard R. Vondrak; Nikolai Østgaard
et al. (2005). Simultaneous observations of the auroral oval in both hemispheres under varying conditions. (ekstern lenke)
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Anil Bhardwaj; Ronald F. Elsner; G. Randall Gladstone
et al. (2007). X-rays from solar system objects. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard
(2009). Asymmetric auroral intensities in the Earth's Northern and Southern hemispheres. (ekstern lenke)
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Krystallia Dimitriadou; Olivier Chanrion; Torsten Neubert
et al. (2022). Analysis of Blue Corona Discharges at the Top of Tropical Thunderstorm Clouds in Different Phases of Convection. (ekstern lenke)
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M.D. Caballero-García; Rahul Gupta; S.B. Pandey
et al. (2023). Multiwavelength study of the luminous GRB 210619B observed with Fermi and ASIM. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Sante Laviola
et al. (2015). Observation of intrinsically bright terrestrial gamma ray flashes from the Mediterranean basin. (ekstern lenke)
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Nikolai Østgaard; Kjetil Albrechtsen; Thomas Gjesteland
et al. (2015). A new population of terrestrial gamma-ray flashes in the RHESSI data. (ekstern lenke)
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Nikolai Østgaard; Brant Edward Carlson; Ragnhild Schrøder Nisi
et al. (2016). Relativistic electrons from sparks in the laboratory. (ekstern lenke)
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Nikolai Østgaard; Jone Peter Reistad; Paul Arne Riksheim Tenfjord
et al. (2016). Mechanisms that Produce Auroral Asymmetries in Conjugate Hemispheres. (ekstern lenke)
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Kristian Snekvik; Liisa Juusola; Nikolai Østgaard
et al. (2009). Reconnection Hall current system observed in the magnetotail and in the ionosphere. (ekstern lenke)
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Anjing Huang; Steven A. Cummer; Yunjiao Pu
et al. (2022). Transition in Optical and Radio Features During the Early Development of Negative Intracloud Leader. (ekstern lenke)
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Anne Borg; N Ostgaard; Nikolai Østgaard
et al. (2007). Simultaneous observations of magnetotail reconnection and bright X-ray aurora on 2 October 2002. (ekstern lenke)
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Ragnhild Schrøder Nisi; Nikolai Østgaard; Thomas Gjesteland
et al. (2014). An altitude and distance correction to the initial fluence distribution of TGFs. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Karl Magnus Laundal
et al. (2014). Intensity asymmetries in the dusk sector of the poleward auroral oval due to IMF Bx. (ekstern lenke)
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Camilla Sætre; Charles A. Barth; Johan Stadsnes
et al. (2006). Comparisons of electron energy deposition derived from observations of lower thermospheric nitric oxide and from X-ray bremsstrahlung measurements. (ekstern lenke)
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Karl Magnus Laundal; Jone Peter Reistad; Spencer Mark Hatch
et al. (2020). Time-scale dependence of solar wind-based regression models of ionospheric electrodynamics. (ekstern lenke)
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Nikolai Østgaard; Karl Magnus Laundal; Liisa Juusola
et al. (2011). Interhemispherical asymmetry of substorm onset locations and the interplanetary magnetic field. (ekstern lenke)
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Nikolai Østgaard; Thomas Gjesteland; Johan Stadsnes
et al. (2008). Production altitude and time delays of the terrestrial gamma flashes: Revisiting the Burst and Transient Source Experiment spectra. (ekstern lenke)
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Nikolai Østgaard; Nikolai Tsyganenko; S.B. Mende
et al. (2005). Observations and model predictions of substorm auroral asymmetries in the conjugate hemispheres. (ekstern lenke)
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Su Zhou; Xiaoli Luan; Finn Søraas
et al. (2018). The detached auroras induced by the solar wind pressure enhancement in both hemispheres from imaging and in situ particle observations. (ekstern lenke)
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Anders Ohma; Karl Magnus Laundal; Jone Peter Reistad
et al. (2022). Evolution of IMF By induced asymmetries during substorms: Superposed epoch analysis at geosynchronous orbit. (ekstern lenke)
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Thomas Gjesteland; Nikolai Østgaard; Phillip Bitzer
et al. (2017). On the timing between terrestrial gamma ray flashes, radio atmospherics, and optical lightning emission. (ekstern lenke)
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C.J. Farrugia; Per Even Sandholt; R. B. Torbert
et al. (2004). Temporal and spatial aspects of the cusp inferred from local and global ground- and space-based observations in a case study. (ekstern lenke)
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Anil Bhardwaj; G. Randall Gladstone; Ronald F. Elsner
et al. (2007). First terrestrial soft X-ray auroral observation by the Chandra X-ray Observatory. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Paul Tenfjord
et al. (2016). Dynamic effects of restoring footpoint symmetry on closed magnetic field lines. (ekstern lenke)
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Dongshuai Li; Alejandro Luque; F.J. Gordillo-Vazquez
et al. (2023). Different Types of Corona Discharges Associated With High-Altitude Positive Narrow Bipolar Events Nearby Cloud Top. (ekstern lenke)
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M.D. Caballero-García; E. Göǧüş; J. Navarro-González
et al. (2025). X-ray and gamma-ray timing of GRB 180720B, GRB 181222B, GRB 211211A, and GRB 220910A observed with Fermi and ASIM. (ekstern lenke)
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H.U. Frey; G. Haerendel; S.B. Mende
et al. (2004). Sub-auroral morning proton spots (SAMPS) as a result of plasmapause-ring current interaction. (ekstern lenke)
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C.J. Farrugia; P.E. Sandholt; R.B. Torbert
et al. (2004). Temporal and spatial aspects of the cusp inferred from local and global ground- and space-based observations in a case study. (ekstern lenke)
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Kjetil Albrechtsen; Nikolai Østgaard; Nini Berge
et al. (2018). Observationally Weak TGFs in the RHESSI Data. (ekstern lenke)
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Karl Magnus Laundal; Jesper Gjerløv; Nikolai Østgaard
et al. (2016). The impact of sunlight on high-latitude equivalent currents. (ekstern lenke)
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Torsten Neubert; Nikolai Østgaard; Victor Reglero
et al. (2020). A terrestrial gamma-ray flash and ionospheric ultraviolet emissions powered by lightning. (ekstern lenke)
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Karl Magnus Laundal; Jone Peter Reistad; Christopher C. Finlay
et al. (2018). Interplanetary Magnetic Field Bx Component Influence on Horizontal and Field-Aligned Currents in the Ionosphere. (ekstern lenke)
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Nikolai Østgaard; Beate Krøvel Humberset; Karl Magnus Laundal
(2011). Evolution of auroral asymmetries in the conjugate hemispheres during two substorms. (ekstern lenke)
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Nikolai Østgaard; Jone Peter Reistad; Paul Tenfjord
et al. (2018). The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001. (ekstern lenke)
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J-B Renard; G Berthet; V Catoire
et al. (2009). COBRAT project: Long duration balloons for the study of high energy phenomena and consequence for stratospheric chemistry,. (ekstern lenke)
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Arve Aksnes; Johan Stadsnes; Nikolai Østgaard
et al. (2006). Height profiles of the ionospheric electron density derived using space-based remote sensing of UV and X ray emissions and EISCAT radar data: A ground-truth experiment. (ekstern lenke)
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Nikolai Østgaard; Johan Stadsnes; Jon Bjordal
et al. (2000). Global X-ray emission during an isolated substorm - a case study. (ekstern lenke)
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Anders Ohma; Nikolai Østgaard; Jone Peter Reistad
et al. (2018). Evolution of Asymmetrically Displaced Footpoints During Substorms. (ekstern lenke)
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Karl Magnus Laundal; Nikolai Østgaard
(2008). Persistent global proton aurora caused by high solar wind dynamic pressure. (ekstern lenke)
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Jone Peter Reistad; Nikolai Østgaard; Karl Magnus Laundal
et al. (2013). On the non-conjugacy of nightside aurora and their generator mechanisms. (ekstern lenke)
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Arve Aksnes; Olaf Amm; Johan Stadsnes
et al. (2005). Ionospheric conductances derived from satellite measurements of auroral UV and X-ray emissions, and ground-based electromagnetic data: A comparison. (ekstern lenke)
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Nikolai Østgaard; Stephen B. Mende; Harald U. Frey
et al. (2007). Auroral conjugacy studies based on global imaging. (ekstern lenke)
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Torsten Neubert; Olivier Chanrion; Matthias Heumesser
et al. (2021). Author Correction: Observation of the onset of a blue jet into the stratosphere (Nature, (2021), 589, 7842, (371-375), 10.1038/s41586-020-03122-6). (ekstern lenke)
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Nikolai Østgaard; Karl Magnus Laundal; Beate Krøvel Humberset
(2013). Correction to 'Evolution of auroral asymmetries in the conjugate hemispheres during two substorms.'. (ekstern lenke)
-
Torsten Neubert; Olivier Chanrion; Matthias Heumesser
et al. (2021). Author Correction: Observation of the onset of a blue jet into the stratosphere (Nature, (2021), 589, 7842, (371-375), 10.1038/s41586-020-03122-6). (ekstern lenke)
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