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  • Vecchio, A.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France.;Radboud Univ Nijmegen, Dept Astrophys, Radboud Radio Lab, Nijmegen, Netherlands. (författare)

Solar Orbiter/RPW antenna calibration in the radio domain and its application to type III burst observations

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • 2021-12-14
  • EDP Sciences,2021
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-307153
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-307153URI
  • https://doi.org/10.1051/0004-6361/202140988DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-464271URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20220126
  • Context. In order to allow for a comparison with the measurements from other antenna systems, the voltage power spectral density measured by the Radio and Plasma waves receiver (RPW) on board Solar Orbiter needs to be converted into physical quantities that depend on the intrinsic properties of the radiation itself (e.g., the brightness of the source). Aims. The main goal of this study is to perform a calibration of the RPW dipole antenna system that allows for the conversion of the voltage power spectral density measured at the receiver's input into the incoming flux density. Methods. We used space observations from the Thermal Noise Receiver (TNR) and the High Frequency Receiver (HFR) to perform the calibration of the RPW dipole antenna system. Observations of type III bursts by the Wind spacecraft are used to obtain a reference radio flux density for cross-calibrating the RPW dipole antennas. The analysis of a large sample of HFR observations (over about ten months), carried out jointly with an analysis of TNR-HFR data and prior to the antennas' deployment, allowed us to estimate the reference system noise of the TNR-HFR receivers. Results. We obtained the effective length, l(eff), of the RPW dipoles and the reference system noise of TNR-HFR in space, where the antennas and pre-amplifiers are embedded in the solar wind plasma. The obtained l(eff) values are in agreement with the simulation and measurements performed on the ground. By investigating the radio flux intensities of 35 type III bursts simultaneously observed by Wind and Solar Orbiter, we found that while the scaling of the decay time as a function of the frequency is the same for the Waves and RPW instruments, their median values are higher for the former. This provides the first observational evidence that Type III radio waves still undergo density scattering, even when they propagate from the source, in a medium with a plasma frequency that is well below their own emission frequency.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Maksimovic, M.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France.,UMR7328 CNRS, LPC2E, 3A Av Rech Sci, F-45071 Orleans, France.;Univ Orleans, 3A Av Rech Sci, F-45071 Orleans, France.,Austrian Acad Sci, Space Res Inst, Graz, Austria. (författare)
  • Krupar, VUniv Maryland Baltimore Cty, Goddard Planetary Heliophys Inst, Baltimore, MD 21228 USA.;NASA, Heliophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD USA. (författare)
  • Bonnin, X.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France. (författare)
  • Zaslavsky, A.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France. (författare)
  • Astier, P. L.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France. (författare)
  • Dekkali, M.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France. (författare)
  • Cecconi, B.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France. (författare)
  • Bale, S. D.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.;Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.,Czech Acad Sci, Inst Atmospher Phys, Prague, Czech Republic.;Czech Acad Sci, Astron Inst, Ondvrejov, Czech Republic. (författare)
  • Chust, T.Sorbonne Univ, Univ Paris Saclay, Observ Paris, Ecole Polytech,LPP,CNRS, Paris, France. (författare)
  • Guilhem, E.CNES, 18 Ave Edouard Belin, F-31400 Toulouse, France. (författare)
  • Khotyaintsev, Yu, VSwedish Inst Space Phys IRE, Uppsala, Sweden. (författare)
  • Krasnoselskikh, VUniv Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.;UMR7328 CNRS, LPC2E, 3A Av Rech Sci, F-45071 Orleans, France.;Univ Orleans, 3A Av Rech Sci, F-45071 Orleans, France. (författare)
  • Kretzschmar, M.UMR7328 CNRS, LPC2E, 3A Av Rech Sci, F-45071 Orleans, France.;Univ Orleans, 3A Av Rech Sci, F-45071 Orleans, France. (författare)
  • Lorfevre, E.CNES, 18 Ave Edouard Belin, F-31400 Toulouse, France. (författare)
  • Plettemeier, D.Tech Univ Dresden, Wurzburger Str 35, D-01187 Dresden, Germany. (författare)
  • Souceck, J.Czech Acad Sci, Inst Atmospher Phys, Prague, Czech Republic. (författare)
  • Steller, M.Austrian Acad Sci, Space Res Inst, Graz, Austria. (författare)
  • Stverak, S.Czech Acad Sci, Inst Atmospher Phys, Prague, Czech Republic.;Czech Acad Sci, Astron Inst, Ondvrejov, Czech Republic. (författare)
  • Travnicek, P.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.;Czech Acad Sci, Inst Atmospher Phys, Prague, Czech Republic. (författare)
  • Vaivads, AndrisKTH,Rymd- och plasmafysik,KTH Royal Inst Technol, Sch Elect Engn & Comp Sci, Space & Plasma Phys, Stockholm, Sweden.(Swepub:kth)u167dmzs (författare)
  • Khotyaintsev, Yuri V.Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)ykh28990 (författare)
  • Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France.;Radboud Univ Nijmegen, Dept Astrophys, Radboud Radio Lab, Nijmegen, Netherlands.Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France. (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Astronomy and Astrophysics: EDP Sciences656, s. A33-0004-63611432-0746

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