WFRF:(Khotyaintsev Yu V.)
Sökning: WFRF:(Khotyaintsev Yu V.) > Solar Orbiter/RPW a...
Solar Orbiter/RPW antenna calibration in the radio domain and its application to type III burst observations
-
- Vecchio, A. (författare)
- Univ PSL, Sorbonne Univ, Univ Paris, Observ Paris,LESIA,CNRS, Paris, France.;Radboud Univ Nijmegen, Dept Astrophys, Radboud Radio Lab, Nijmegen, Netherlands.
-
- Maksimovic, M. (författare)
- 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.
-
- Krupar, V (författare)
- Univ Maryland Baltimore Cty, Goddard Planetary Heliophys Inst, Baltimore, MD 21228 USA.;NASA, Heliophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD USA.
- visa fler...
- visa färre...
- 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)
- 2021-12-14
- 2021
- Engelska.
- Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 656, s. A33-
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 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
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- Sun
- radio radiation
- solar wind
- instrumentation
- detectors
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
- Astronomy and Astrophysics (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
Hitta mer i SwePub
- Av författaren/redakt...
- Vecchio, A.
- Maksimovic, M.
- Krupar, V
- Bonnin, X.
- Zaslavsky, A.
- Astier, P. L.
- visa fler...
- Dekkali, M.
- Cecconi, B.
- Bale, S. D.
- Chust, T.
- Guilhem, E.
- Khotyaintsev, Yu ...
- Krasnoselskikh, ...
- Kretzschmar, M.
- Lorfevre, E.
- Plettemeier, D.
- Souceck, J.
- Steller, M.
- Stverak, S.
- Travnicek, P.
- Vaivads, Andris
- Khotyaintsev, Yu ...
- visa färre...
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Fysik
- och Astronomi astrof ...
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Fysik
- och Fusion plasma oc ...
- Artiklar i publikationen
- Astronomy and As ...
- Av lärosätet
- Kungliga Tekniska Högskolan
- Uppsala universitet
Sök utanför SwePub
- Sök vidare i:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
