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Solar radio emissio...
Solar radio emission as a disturbance of aeronautical radionavigation
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- Marque, Christophe (författare)
- Royal Observ Belgium, Solar Terr Ctr Excellence SIDC, Ave Circulaire 3, B-1180 Brussels, Belgium
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- Klein, Karl-Ludwig (författare)
- CNRS, LESIA UMR 8109, F-92190 Meudon, France;CNRS, Stn Radioastron Nancay, Observ Paris, F-92190 Meudon, France;PSL Res Univ, Paris, France;Univ P&M Curie, Paris, France;Univ Paris Diderot, Paris, France;Univ Orleans, Orleans, France;OSUC, Orleans, France
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- Monstein, Christian (författare)
- Swiss Fed Inst Technol, Inst Particle Phys & Astrophys, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland
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- Opgenoorth, Hermann J. (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Pulkkinen, Antti (författare)
- Goddard Space Flight Ctr Greenbelt, Greenbelt, MD USA
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- Buchert, Stephan (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Krucker, Saem (författare)
- Univ Appl Sci & Arts Northwestern Switzerland, Windisch, Switzerland
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- Van Hoof, Rudiger (författare)
- Belgocontrol, Tervuursesteenweg 303, B-1820 Steenokkerzeel, Belgium
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- Thulesen, Peter (författare)
- Air Greenland Engn Dept, POB 1012, Nuuk, Greenland
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(creator_code:org_t)
- 2018-10-03
- 2018
- Engelska.
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Ingår i: Journal of Space Weather and Space Climate. - : EDP Sciences. - 2115-7251. ; 8
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://www.swsc-jou...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- On November 4th, 2015 secondary air traffic control radar was strongly disturbed in Sweden and some other European countries. The disturbances occurred when the radar antennas were pointing at the Sun. In this paper, we show that the disturbances coincided with the time of peaks of an exceptionally strong (similar to 10(5) Solar Flux Units) solar radio burst in a relatively narrow frequency range around 1 GHz. This indicates that this radio burst is the most probable space weather candidate for explaining the radar disturbances. The dynamic radio spectrum shows that the high flux densities are not due to synchrotron emission of energetic electrons, but to coherent emission processes, which produce a large variety of rapidly varying short bursts (such as pulsations, fiber bursts, and zebra patterns). The radio burst occurs outside the impulsive phase of the associated flare, about 30 min after the soft X-ray peak, and it is temporarily associated with fast evolving activity occurring in strong solar magnetic fields. While the relationship with strong magnetic fields and the coherent spectral nature of the radio burst provide hints towards the physical processes which generate such disturbances, we have so far no means to forecast them. Well-calibrated monitoring instruments of whole Sun radio fluxes covering the UHF band could at least provide a real-time identification of the origin of such disturbances, which reports in the literature show to also affect GPS signal reception.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Sun: radio radiation
- Sun: flares
- Sun: solar-terrestrial relations
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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