Blar i forfatter "Gunnarsdottir, Tinna"

Viser treff 1-6 av 6

    • 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 ...

    • Charging Effects and Detection of Mesospheric Dust with the Instrument SPID on the G-Chaser Rocket 

      Gunnarsdottir, Tinna (Master thesis; Mastergradsoppgave, 2019-06-01)
      Smoke Particle Impact Detector (SPID) is a faraday cup impact probe designed and built by the University of Tromso (UIT). Its main purpose is to measure nanometer sized smoke particles (in-situ) in the atmosphere, and to do that it needs to be launched on a sounding rocket. Its design is an open faraday cup with grids to shield out ambient plasma and a larger slanted impact grid to measure the ...

    • Modulation of polar mesospheric summer echoes (PMSEs) with high-frequency heating during low solar illumination 

      Gunnarsdottir, Tinna; Mann, Ingrid; Poggenpohl, Arne Hendrik; Mahmoudian, Alireza; Dalin, Peter; Rietveld, Michael T.; Haeggstroem, Ingemar (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-14)
      Polar mesospheric summer echo (PMSE) formation is linked to charged dust/ice particles in the mesosphere. We investigate the modulation of PMSEs with radio waves based on measurements with EISCAT VHF radar and EISCAT heating facility during low solar illumination. The measurements were made in August 2018 and 2020 around 20:02 UT. Heating was operated in cycles with intervals of 48 s on and 168 ...

    • 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; Fredriksen, Åshild; Eilertsen, Yngve; Havnes, Ole; Hansen, Rikke; Floer, Markus; Bjørk, Arne; Bootby, Christopher; Latteck, Ralph (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10)
      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 crosssection of 0.97 for ...

    • 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 ...

    • Radar studies of ionospheric dusty plasma phenomena 

      Mann, Ingrid; Gunnarsdottir, Tinna; Häggström, Ingemar; Eren, Saliha; Tjulin, Anders; Myrvang, Margaretha; Rietveld, Mike T; Dalin, Peter; Jozwicki, Dorota; Trollvik, Henriette Marie Tveitnes (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-17)
      We discuss the influence of charged dust on radar observations in the Earth ionosphere. This region in the upper Earth atmosphere can be described as a partially ionized, low‐temperature plasma. Plasma parameters vary by orders of magnitude spatially and in time. Dust particles influence the charge balance, in some cases dusty plasma condition is met. The polar mesospheric echoes are an example of ...