Browsing Bergen Open Research Archive by Author "McWilliams, Kathryn A."

Now showing items 1-4 of 4

    • Dayside Field-Aligned Current Impacts on Ionospheric Irregularities 

      Follestad, Anna Kristine Fæhn; Herlingshaw, Katie; Ghadjari, Hossein; Knudsen, David J.; McWilliams, Kathryn A.; Moen, Jøran Idar; Spicher, Andres; Wu, Jingjing; Oksavik, Kjellmar (Journal article; Peer reviewed, 2020)
      Global Navigation Satellite Systems (GNSS) are subject to disturbances caused by plasma irregularities in the ionosphere. Studies have suggested that in addition to the gradient drift and Kelvin‐Helmholtz instabilities, ...

    • The Relationship Between Large Scale Thermospheric Density Enhancements and the Spatial Distribution of Poynting Flux 

      Billett, Daniel; Clausen, Lasse Boy Novock; Archer, William; McWilliams, Kathryn A.; Håland, Stein Egil; Reistad, Jone Peter; Burchill, J. K.; Patrick, M. R.; Humberset, Beate Krøvel; Anderson, B. J.; Perry, G. W. (Journal article; Peer reviewed, 2021)
      Large thermospheric neutral density enhancements in the cusp region have been examined for many years. The Challenging Minisatellite Payload (CHAMP) satellite for example has enabled many observations of the perturbation, ...

    • Simultaneous Development of Multiple Auroral Substorms: Double Auroral Bulge Formation 

      Ohtani, S.; Gjerløv, Jesper; McWilliams, Kathryn A.; Ruohoniemi, J. M.; Frey, Harald U. (Journal article; Peer reviewed, 2021)
      The expansion phase of auroral substorms is characterized by the formation of an auroral bulge, and it is generally considered that a single bulge forms following each substorm onset. However, we find that occasionally two ...

    • Swarm in situ observations of F region polar cap patches created by cusp precipitation 

      Goodwin, Lindsay; Iserhienrhien, Blessing; Miles, David M.; Patra, Swadesh; van der Meeren, Christer; Buchert, Stephan C.; Burchill, Jonathan; Clausen, Lasse Boy Novock; Knudsen, David J.; McWilliams, Kathryn A.; Moen, Jøran Idar (Peer reviewed; Journal article, 2015-02-26)
      High-resolution in situ measurements from the three Swarm spacecraft, in a string-of-pearls configuration, provide new insights about the combined role of flow channel events and particle impact ionization in creating F ...