Blar i forfatter "Hansen, Rikke Hedelund"

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    • CHARGING AND DETECTION OF MESOSPHERIC DUST WITH INSTRUMENT SPID ON G-CHASER ROCKET 

      Gunnarsdottir, Tinna; Trollvik, Henriette; Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Antonsen, Tarjei; Björk, Arne; Restad, Erlend; Havnes, Ove; Fredriksen, Åshild; Boothby, Christoffer; Hansen, Rikke Hedelund; Floer, Markus (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
      The Smoke Particle Impact Detector (SPID) was flown on the G-Chaser student rocket that was launched from Andøya on 13 January 2019. SPID is a Faraday cup instrument with applied bias voltages to deflect the ambient plasma and a target area inside the probe designed to measure the dust particles by charge detection. The charging process of the dust particles in the detector is important for interpretation ...

    • A Comparison of Naturally Enhanced Ion Acoustic Lines and Auroral Spectral Line Emissions 

      Hansen, Rikke Hedelund (Master thesis; Mastergradsoppgave, 2019-05-31)
      In this thesis, we present Naturally Enhanced Ion Acoustic Lines (NEIALs) observed with the EISCAT Svalbard Radar and a comparison with auroral emissions lines measured with a Meridian Scanning Photometer. NEIALs are short-lived events noticeable in the incoherent scatter spectra as an enhancement in one or both shoulders. It has been assumed that NEIALs are associated with an active red emission ...

    • Observation of mesospheric dust and ionospheric conditions during the G-chaser rocket campaign 

      Trollvik, Henriette Marie Tveitnes; Gunnarsdottir, Tinna; Mann, Ingrid; Olsen, Sveinung viggo; Restad, Erlend; Antonsen, Tarjei; Havnes, Ove; Fredriksen, Åshild; Boothby, Christoffer; Björk, Arne; Hansen, Rikke Hedelund; Floer, Markus; Eilertsen, Yngve; Latteck, Ralph (Conference object; Konferansebidrag, 2019)
      SPID, Smoke Particle Impact Detector, is a Faraday cup detector designed to measure nanometer-sized meteoric smoke particles during rocket flights. We report measurements made with SPID during the G-Chaser student rocket campaign 13 January 2019 and describe the design of the SPID instruments. Model calculations of dust trajectories within the detector result in an effective cross section of 0.97 ...