Jøran Idar Moen

• Chernyshov, Aleksander A.; Spicher, Andres; Ilyasov, Askar A.; Miloch, Wojciech Jacek; Clausen, Lasse Boy Novock; Saito, Yoshifumi; Jin, Yaqi & Moen, Jøran Idar (2018). Studies of small-scale plasma inhomogeneities in the cusp ionosphere using sounding rocket data. Physics of Plasmas.  ISSN 1070-664X.  25(4) . doi: 10.1063/1.5026281
• Hoang, Huy Minh; Clausen, Lasse Boy Novock; Røed, Ketil; Bekkeng, Tore Andre; Trondsen, Espen; Lybekk, Bjørn; Strøm, Halvor; Bang-Hauge, David Michael; Pedersen, Arne; Spicher, Andres & Moen, Jøran Idar (2018). The Multi-Needle Langmuir Probe System on Board NorSat-1. Space Science Reviews.  ISSN 0038-6308.  214(4) . doi: 10.1007/s11214-018-0509-2
• Hoang, Huy Minh; Røed, Ketil; Bekkeng, Tore Andre; Moen, Jøran Idar; Spicher, Andres; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek; Trondsen, Espen & Pedersen, Arne (2018). A study of data analysis techniques for the multi-needle Langmuir probe. Measurement science and technology.  ISSN 0957-0233.  29(6) . doi: 10.1088/1361-6501/aab948
• Mann, Ingrid; Kauristie, Kirsti; Bamford, Ruth; McCrea, Ian; Moen, Jøran Idar; Oksavik, Kjellmar; Yamauchi, Masanori; Johnsen, Magnar Gullikstad & Turunen, Esa (2018). Challenges and Strategic Research Plans for Earth and Heliosphere: Research Infrastructures, Projects and Initiatives. Proceedings of the International Astronomical Union.  ISSN 1743-9213.
• Chen, Xiangcai; Han, Desheng; Lorentzen, Dag Arne; Oksavik, Kjellmar; Moen, Jøran Idar & Baddeley, Lisa (2017). Dynamic properties of throat aurora revealed by simultaneous ground and satellite observations. Journal of Geophysical Research - Space Physics.  ISSN 2169-9380.  122(3), s 3469- 3486 . doi: 10.1002/2016JA023033 Full text in Research Archive. Show summary

  Throat aurora is defined as south-north aligned auroral arcs equatorward of the dayside cusp aurora and was suggested to be the results of cold magnetospheric plasma interaction with magnetopause reconnection, but its observational properties have not yet been well established. In this paper we carefully examine a sequence of throat auroras observed over Svalbard on 27 December 2003. Observations from 630.0 nm [OI] show that poleward moving throat auroras frequently show brightening followed by dimming in auroral intensity, and sometimes, the brightening throat aurora is a precursor of poleward moving auroral forms. Simultaneous all-sky images and HF radar backscatter observations along geomagnetic meridian show that the throat aurora brightening is drifting with ionospheric E × B convection and is colocated with enhanced spectral width poleward of the convection reversal boundary (CRB), while its dimming tends to be in the vicinity of the CRB. This leads us to propose that the throat aurora brightening and dimming may be on the open and closed field lines, respectively. Particle data from NOAA 16 confirm that the dimming throat aurora is associated with precipitation of magnetosheath-like particles mixed with magnetospheric ions (>30 keV), which is characteristic of the low-latitude boundary layer. For particle data from Defense Meteorological Satellite Program F16, we notice that the dimming throat aurora is associated with lower fluxes of magnetosheath-like electrons accompanied with magnetospheric electrons, which is most likely on closed field lines. The dynamic properties of throat aurora presented in this paper are thus important to understand its generation mechanisms.

• Hoang, Huy Minh; Røed, Ketil; Bekkeng, Tore Andre; Trondsen, Espen; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek & Moen, Jøran Idar (2017). High spatial-resolution electron density measurement by Langmuir probe for multi-point observations using tiny spacecraft. Measurement science and technology.  ISSN 0957-0233.  28(11) . doi: 10.1088/1361-6501/aa87e1
• Jin, Yaqi; Moen, Jøran Idar; Oksavik, Kjellmar; Spicher, Andres; Clausen, Lasse Boy Novock & Miloch, Wojciech Jacek (2017). GPS scintillations associated with cusp dynamics and polar cap patches. Journal of Space Weather and Space Climate.  ISSN 2115-7251.  7 . doi: 10.1051/swsc/2017022 Full text in Research Archive. Show summary

  This paper investigates the relative scintillation level associated with cusp dynamics (including precipitation, flow shears, etc.) with and without the formation of polar cap patches around the cusp inflow region by the EISCAT Svalbard radar (ESR) and two GPS scintillation receivers. A series of polar cap patches were observed by the ESR between 8:40 and 10:20 UT on December 3, 2011. The polar cap patches combined with the auroral dynamics were associated with a significantly higher GPS phase scintillation level (up to 0.6 rad) than those observed for the other two alternatives, i.e., cusp dynamics without polar cap patches, and polar cap patches without cusp aurora. The cusp auroral dynamics without plasma patches were indeed related to GPS phase scintillations at a moderate level (up to 0.3 rad). The polar cap patches away from the active cusp were associated with sporadic and moderate GPS phase scintillations (up to 0.2 rad). The main conclusion is that the worst global navigation satellite system space weather events on the dayside occur when polar cap patches enter the polar cap and are subject to particle precipitation and flow shears, which is analogous to the nightside when polar cap patches exit the polar cap and enter the auroral oval.

• Kim, Hyomin; Lessard, Marc R.; Jones, Sarah L.; Lynch, Kristina A.; Fernandes, Philip A.; Aruliah, Anasuya L.; Engebretson, Mark J.; Moen, Jøran Idar; Oksavik, Kjellmar; Yahnin, Alexander G. & Yeoman, Timothy K. (2017). Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling. Journal of Geophysical Research - Space Physics.  ISSN 2169-9380.  122(5), s 4943- 4959 . doi: 10.1002/2017JA023904 Full text in Research Archive. Show summary

  We present simultaneous observations of magnetosphere-ionosphere-thermosphere coupling over Svalbard during a traveling convection vortex (TCV) event. Various spaceborne and ground-based instruments made coordinated measurements, including magnetometers, particle detectors, an all-sky camera, European Incoherent Scatter (EISCAT) Svalbard Radar, Super Dual Auroral Radar Network (SuperDARN), and SCANning Doppler Imager (SCANDI). The instruments recorded TCVs associated with a sudden change in solar wind dynamic pressure. The data display typical features of TCVs including vortical ionospheric convection patterns seen by the ground magnetometers and SuperDARN radars and auroral precipitation near the cusp observed by the all-sky camera. Simultaneously, electron and ion temperature enhancements with corresponding density increase from soft precipitation are also observed by the EISCAT Svalbard Radar. The ground magnetometers also detected electromagnetic ion cyclotron waves at the approximate time of the TCV arrival. This implies that they were generated by a temperature anisotropy resulting from a compression on the dayside magnetosphere. SCANDI data show a divergence in thermospheric winds during the TCVs, presumably due to thermospheric heating associated with the current closure linked to a field-aligned current system generated by the TCVs. We conclude that solar wind pressure impulse-related transient phenomena can affect even the upper atmospheric dynamics via current systems established by a magnetosphere-ionosphere-thermosphere coupling process.

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• Antonsen, Tarjei; Havnes, Ove; Fredriksen, Åshild; Friedrich, Martin; Sternovsky, Zoltan; Plane, John M.C.; Hartquist, Tom; Olsen, Sveinung viggo; Eilertsen, Yngve; Trondsen, Espen; Mann, Ingrid; Gumbel, Jörg; Moen, Jøran Idar; Latteck, Ralph; Baumgarten, Gerd; Höffner, Josef; Hoppe, Ulf-Peter & Karlberg, Jan Ove (2017). Mesospheric dust observations during the MAXIDUSTY campaign.
• Brinkman, D. G.; Walterscheid, R. L.; Clemmons, J.H.; Hecht, J. H.; Lessard, Marc R.; Fritz, B; Hysell, David; Clausen, Lasse Boy Novock; Moen, Jøran Idar; Oksavik, Kjellmar & Yeoman, Timothy K. (2017). High Resolution Modeling of the Thermospheric Response to Energy Inputs during the RENU-2 Rocket Flight.

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