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The ADAHELI solar mission: Investigating the structure of Sun’s lower atmosphere

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Title: The ADAHELI solar mission: Investigating the structure of Sun’s lower atmosphere
Authors: Berrilli, F.1 berrilli@roma2.infn.it, Bigazzi, A.2 alberto.bigazzi@roma2.infn.it, Roselli, L.3 roselli@diei.unipg.it, Sabatini, P.4 psabatini@cgspace.it, Velli, M.5 velli@arcetri.astro.it, Alimenti, F.3 alimenti@diei.unipg.it, Cavallini, F.6 fabio@arcetri.astro.it, Greco, V.7 vincenzo.greco@inoa.it, Moretti, P.F.8 pierfrancesco.moretti@cnr.it, Orsini, S.9 stefano.orsini@ifsi-roma.inaf.it, Romoli, M.10 romoli@arcetri.astro.it, White, S.M.11 white@astro.umd.edu
Source: Advances in Space Research. May2010, Vol. 45 Issue 10, p1191-1202. 12p.
Subjects: Heliosphere, Atmospheric boundary layer, Solar photosphere, Solar chromosphere, Near infrared spectroscopy, Particle acceleration, Solar telescopes, Fabry-Perot interferometers
Abstract: Abstract: ADAHELI (ADvanced Astronomy for HELIophysics) is a small-class (500kg) low-budget (50 MEuro) satellite mission for the study of the solar photosphere and the chromosphere and for monitoring solar flare emission. ADAHELI’s design has completed its Phase-A feasibility study in December 2008, in the framework of ASI’s (Agenzia Spaziale Italiana) 2007 “Small Missions” Program (calling for two missions at 50 MEeuros each, plus the launch budget). ADAHELI’s main purpose is to explore Sun’s lower atmosphere in the near-infrared, a region so far unexplored by solar observations from space. ADAHELI will carry out observations of the solar photosphere and of the chromosphere at high-temporal rate and high spatial and spectral resolutions. ADAHELI will contribute to the understanding of Space Weather through the study of particle acceleration during flares. A radiometer operating in the millimeter radio band will continuously monitor the solar disk, throughout the spacecraft’s life time. ADAHELI’s baseline instruments are a 50-cm high-resolution telescope operating in the visible and the near-infrared, and a lightweight full-disk radiometer operating at millimeter wavelengths (90GHz). The core of the telescope’s focal plane suite is the spectral imager based on two Fabry-Perot interferometers, flying for the first time on a solar mission. The instrument will return fast-cadence, full bi-dimensional spectral images at high-resolution, thus improving on current slit-scan, mono-dimensional architectures. Moreover, the possibility of working in polarized light will enable full 3D magnetic field reconstruction on the photosphere and the chromosphere. An optional instrumental package is also being proposed to further extend ADAHELI’s scope: a full-disk telescope for helioseismology based on a double Magneto-Optical Filter, a Neutral Particle Analyzer for magnetospheric research, an Extreme Ultraviolet imaging and spectro-radiometry instrument. These options fall outside the prescribed budget. ADAHELI, flying a Sun-Synchronous orbit at 800km, will perform continuous, long-duration (4-h), daily acquisitions, with the possibility of extending them up to 24h. ADAHELI’s operating life is two years, plus one extension year. Launch would be nominally planned for 2014. [Copyright &y& Elsevier]
Copyright of Advances in Space Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The ADAHELI solar mission: Investigating the structure of Sun’s lower atmosphere
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  Data: <searchLink fieldCode="AR" term="%22Berrilli%2C+F%2E%22">Berrilli, F.</searchLink><relatesTo>1</relatesTo><i> berrilli@roma2.infn.it</i><br /><searchLink fieldCode="AR" term="%22Bigazzi%2C+A%2E%22">Bigazzi, A.</searchLink><relatesTo>2</relatesTo><i> alberto.bigazzi@roma2.infn.it</i><br /><searchLink fieldCode="AR" term="%22Roselli%2C+L%2E%22">Roselli, L.</searchLink><relatesTo>3</relatesTo><i> roselli@diei.unipg.it</i><br /><searchLink fieldCode="AR" term="%22Sabatini%2C+P%2E%22">Sabatini, P.</searchLink><relatesTo>4</relatesTo><i> psabatini@cgspace.it</i><br /><searchLink fieldCode="AR" term="%22Velli%2C+M%2E%22">Velli, M.</searchLink><relatesTo>5</relatesTo><i> velli@arcetri.astro.it</i><br /><searchLink fieldCode="AR" term="%22Alimenti%2C+F%2E%22">Alimenti, F.</searchLink><relatesTo>3</relatesTo><i> alimenti@diei.unipg.it</i><br /><searchLink fieldCode="AR" term="%22Cavallini%2C+F%2E%22">Cavallini, F.</searchLink><relatesTo>6</relatesTo><i> fabio@arcetri.astro.it</i><br /><searchLink fieldCode="AR" term="%22Greco%2C+V%2E%22">Greco, V.</searchLink><relatesTo>7</relatesTo><i> vincenzo.greco@inoa.it</i><br /><searchLink fieldCode="AR" term="%22Moretti%2C+P%2EF%2E%22">Moretti, P.F.</searchLink><relatesTo>8</relatesTo><i> pierfrancesco.moretti@cnr.it</i><br /><searchLink fieldCode="AR" term="%22Orsini%2C+S%2E%22">Orsini, S.</searchLink><relatesTo>9</relatesTo><i> stefano.orsini@ifsi-roma.inaf.it</i><br /><searchLink fieldCode="AR" term="%22Romoli%2C+M%2E%22">Romoli, M.</searchLink><relatesTo>10</relatesTo><i> romoli@arcetri.astro.it</i><br /><searchLink fieldCode="AR" term="%22White%2C+S%2EM%2E%22">White, S.M.</searchLink><relatesTo>11</relatesTo><i> white@astro.umd.edu</i>
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  Data: <searchLink fieldCode="DE" term="%22Heliosphere%22">Heliosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+boundary+layer%22">Atmospheric boundary layer</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+photosphere%22">Solar photosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+chromosphere%22">Solar chromosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Near+infrared+spectroscopy%22">Near infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+acceleration%22">Particle acceleration</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+telescopes%22">Solar telescopes</searchLink><br /><searchLink fieldCode="DE" term="%22Fabry-Perot+interferometers%22">Fabry-Perot interferometers</searchLink>
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  Data: Abstract: ADAHELI (ADvanced Astronomy for HELIophysics) is a small-class (500kg) low-budget (50 MEuro) satellite mission for the study of the solar photosphere and the chromosphere and for monitoring solar flare emission. ADAHELI’s design has completed its Phase-A feasibility study in December 2008, in the framework of ASI’s (Agenzia Spaziale Italiana) 2007 “Small Missions” Program (calling for two missions at 50 MEeuros each, plus the launch budget). ADAHELI’s main purpose is to explore Sun’s lower atmosphere in the near-infrared, a region so far unexplored by solar observations from space. ADAHELI will carry out observations of the solar photosphere and of the chromosphere at high-temporal rate and high spatial and spectral resolutions. ADAHELI will contribute to the understanding of Space Weather through the study of particle acceleration during flares. A radiometer operating in the millimeter radio band will continuously monitor the solar disk, throughout the spacecraft’s life time. ADAHELI’s baseline instruments are a 50-cm high-resolution telescope operating in the visible and the near-infrared, and a lightweight full-disk radiometer operating at millimeter wavelengths (90GHz). The core of the telescope’s focal plane suite is the spectral imager based on two Fabry-Perot interferometers, flying for the first time on a solar mission. The instrument will return fast-cadence, full bi-dimensional spectral images at high-resolution, thus improving on current slit-scan, mono-dimensional architectures. Moreover, the possibility of working in polarized light will enable full 3D magnetic field reconstruction on the photosphere and the chromosphere. An optional instrumental package is also being proposed to further extend ADAHELI’s scope: a full-disk telescope for helioseismology based on a double Magneto-Optical Filter, a Neutral Particle Analyzer for magnetospheric research, an Extreme Ultraviolet imaging and spectro-radiometry instrument. These options fall outside the prescribed budget. ADAHELI, flying a Sun-Synchronous orbit at 800km, will perform continuous, long-duration (4-h), daily acquisitions, with the possibility of extending them up to 24h. ADAHELI’s operating life is two years, plus one extension year. Launch would be nominally planned for 2014. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Advances in Space Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Solar photosphere
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