Nikolai Østgaard

Research interests

Publications

• Blue Optical Observations of Narrow Bipolar Events by ASIM Suggest Corona Streamer Activity in Thunderstorms

  Journal of Geophysical Research Atmospheres · 2020 · 10.1029/2020jd032708

• A terrestrial gamma-ray flash and ionospheric ultraviolet emissions powered by lightning

  Science · 2019 · 10.1126/science.aax3872

• First 10 Months of TGF Observations by ASIM

  Journal of Geophysical Research Atmospheres · 2019 · 10.1029/2019jd031214

• The ASIM Mission on the International Space Station

  NORA - Norwegian Open Research Archives · 2019

• In‐Flight Observation of Gamma Ray Glows by ILDAS

  Journal of Geophysical Research Atmospheres · 2017 · 10.1002/2017jd027405

• Overview of Solar Wind–Magnetosphere–Ionosphere–Atmosphere Coupling and the Generation of Magnetospheric Currents

  Space Science Reviews · 2017 · 10.1007/s11214-017-0333-0

• Defining and resolving current systems in geospace

  Annales Geophysicae · 2015 · 10.5194/angeo-33-1369-2015

• Energy transfer and flow in the solar wind‐magnetosphere‐ionosphere system: A new coupling function

  Journal of Geophysical Research Space Physics · 2013 · 10.1002/jgra.50545

• Simultaneous observations of optical lightning and terrestrial gamma ray flash from space

  Geophysical Research Letters · 2013 · 10.1002/grl.50466

• A new method reveals more TGFs in the RHESSI data

  Geophysical Research Letters · 2012 · 10.1029/2012gl050899

• Estimating the capture and loss of cold plasma from ionospheric outflow

  Journal of Geophysical Research Atmospheres · 2012 · 10.1029/2012ja017679

• The true fluence distribution of terrestrial gamma flashes at satellite altitude

  Journal of Geophysical Research Atmospheres · 2012 · 10.1029/2011ja017365

• Earthward plasma sheet flows during substorm phases

  Journal of Geophysical Research Atmospheres · 2011 · 10.1029/2011ja016852

• Effects of dead time losses on terrestrial gamma ray flash measurements with the Burst and Transient Source Experiment

  Journal of Geophysical Research Atmospheres · 2010 · 10.1029/2009ja014578

• Asymmetric auroral intensities in the Earth’s Northern and Southern hemispheres

  Nature · 2009 · 10.1038/nature08154

• Production altitude and time delays of the terrestrial gamma flashes: Revisiting the Burst and Transient Source Experiment spectra

  Journal of Geophysical Research Atmospheres · 2008 · 10.1029/2007ja012618

• X-rays from solar system objects

  Planetary and Space Science · 2007 · 10.1016/j.pss.2006.11.009

• Observations and model predictions of substorm auroral asymmetries in the conjugate hemispheres

  Geophysical Research Letters · 2005 · 10.1029/2004gl022166

• Interplanetary magnetic field control of the location of substorm onset and auroral features in the conjugate hemispheres

  Journal of Geophysical Research Atmospheres · 2004 · 10.1029/2003ja010370

• FAST and IMAGE‐FUV observations of a substorm onset

  Journal of Geophysical Research Atmospheres · 2003 · 10.1029/2002ja009787

• Neutral hydrogen density profiles derived from geocoronal imaging

  Journal of Geophysical Research Atmospheres · 2003 · 10.1029/2002ja009749

• Observations of non‐conjugate theta aurora

  Geophysical Research Letters · 2003 · 10.1029/2003gl017914

• A relation between the energy deposition by electron precipitation and geomagnetic indices during substorms

  Journal of Geophysical Research Atmospheres · 2002 · 10.1029/2001ja002003

• Energy analysis of substorms based on remote sensing techniques, solar wind measurements, and geomagnetic indices

  Journal of Geophysical Research Atmospheres · 2002 · 10.1029/2001ja002002

• Simultaneous observations of earthward flow bursts and plasmoid ejection during magnetospheric substorms

  Journal of Geophysical Research Atmospheres · 2002 · 10.1029/2000ja003501

Current projects

No projects listed.