ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications

Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ejections (CMEs) and in quiescent active regions. Co...

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Autores principales:	Hamini Abdallah, Auxepaules Gabriel, Birée Lionel, Kenfack Guy, Kerdraon Alain, Klein Karl-Ludwig, Lespagnol Patrice, Masson Sophie, Coutouly Lucile, Fabrice Christian, Romagnan Renaud
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	astronomical instrumentation methods and techniques sun: activity sun: corona sun: coronal mass ejections (cmes) sun: radio radiation Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/75f5e633f1d143069d671330d8722cfd
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spelling	oai:doaj.org-article:75f5e633f1d143069d671330d8722cfd2021-12-02T17:16:28ZORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications2115-725110.1051/swsc/2021039https://doaj.org/article/75f5e633f1d143069d671330d8722cfd2021-01-01T00:00:00Zhttps://www.swsc-journal.org/articles/swsc/full_html/2021/01/swsc210035/swsc210035.htmlhttps://doaj.org/toc/2115-7251Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ejections (CMEs) and in quiescent active regions. Combining space-borne and ground-based radio spectrographs allows one to track disturbances between the low corona, near or at the sites of particle acceleration, and the spacecraft. Radio observations are, therefore, a significant tool in probing the solar origin of heliospheric disturbances, which is a central research topic as witnessed by the Parker Solar Probe and Solar Orbiter missions. The full scientific return of these projects needs vigorous ground-based support, which at radio wavelengths covers altitudes up to about a solar radius above the photosphere. Besides research in solar and heliospheric physics, monitoring solar radio bursts also supports space weather services. On occasion, radio bursts can themselves be a space weather hazard. The Nançay radio astronomy station in central France has a long tradition of monitoring radio emission at decimetre-to-meter wavelengths. This article describes the radio spectrograph ORFEES (Observations Radiospectrographiques pour FEDOME et l’Etude des Eruptions Solaires). It observes the whole-Sun flux density between 144 and 1004 MHz, pertaining to regions between the low corona and about half a solar radius above the photosphere. ORFEES results from a partnership between Observatoire de Paris and the French Air Force, which operates the experimental space weather service FEDOME. The primary use of the instrument at the Paris Observatory is astrophysical observation. Low-resolution data with rapid availability are presently produced for the French Air Force. Similar information can be made available to a broader range of space weather service providers. This article gives an overview of the instrument design and access to the data and shows a few illustrative observations.Hamini AbdallahAuxepaules GabrielBirée LionelKenfack GuyKerdraon AlainKlein Karl-LudwigLespagnol PatriceMasson SophieCoutouly LucileFabrice ChristianRomagnan RenaudEDP Sciencesarticleastronomical instrumentationmethods and techniquessun: activitysun: coronasun: coronal mass ejections (cmes)sun: radio radiationMeteorology. ClimatologyQC851-999ENJournal of Space Weather and Space Climate, Vol 11, p 57 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	astronomical instrumentation methods and techniques sun: activity sun: corona sun: coronal mass ejections (cmes) sun: radio radiation Meteorology. Climatology QC851-999
spellingShingle	astronomical instrumentation methods and techniques sun: activity sun: corona sun: coronal mass ejections (cmes) sun: radio radiation Meteorology. Climatology QC851-999 Hamini Abdallah Auxepaules Gabriel Birée Lionel Kenfack Guy Kerdraon Alain Klein Karl-Ludwig Lespagnol Patrice Masson Sophie Coutouly Lucile Fabrice Christian Romagnan Renaud ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
description	Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ejections (CMEs) and in quiescent active regions. Combining space-borne and ground-based radio spectrographs allows one to track disturbances between the low corona, near or at the sites of particle acceleration, and the spacecraft. Radio observations are, therefore, a significant tool in probing the solar origin of heliospheric disturbances, which is a central research topic as witnessed by the Parker Solar Probe and Solar Orbiter missions. The full scientific return of these projects needs vigorous ground-based support, which at radio wavelengths covers altitudes up to about a solar radius above the photosphere. Besides research in solar and heliospheric physics, monitoring solar radio bursts also supports space weather services. On occasion, radio bursts can themselves be a space weather hazard. The Nançay radio astronomy station in central France has a long tradition of monitoring radio emission at decimetre-to-meter wavelengths. This article describes the radio spectrograph ORFEES (Observations Radiospectrographiques pour FEDOME et l’Etude des Eruptions Solaires). It observes the whole-Sun flux density between 144 and 1004 MHz, pertaining to regions between the low corona and about half a solar radius above the photosphere. ORFEES results from a partnership between Observatoire de Paris and the French Air Force, which operates the experimental space weather service FEDOME. The primary use of the instrument at the Paris Observatory is astrophysical observation. Low-resolution data with rapid availability are presently produced for the French Air Force. Similar information can be made available to a broader range of space weather service providers. This article gives an overview of the instrument design and access to the data and shows a few illustrative observations.
format	article
author	Hamini Abdallah Auxepaules Gabriel Birée Lionel Kenfack Guy Kerdraon Alain Klein Karl-Ludwig Lespagnol Patrice Masson Sophie Coutouly Lucile Fabrice Christian Romagnan Renaud
author_facet	Hamini Abdallah Auxepaules Gabriel Birée Lionel Kenfack Guy Kerdraon Alain Klein Karl-Ludwig Lespagnol Patrice Masson Sophie Coutouly Lucile Fabrice Christian Romagnan Renaud
author_sort	Hamini Abdallah
title	ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
title_short	ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
title_full	ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
title_fullStr	ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
title_full_unstemmed	ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications
title_sort	orfees – a radio spectrograph for the study of solar radio bursts and space weather applications
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/75f5e633f1d143069d671330d8722cfd
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ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications

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