0000000000422910

AUTHOR

Jesper Schou

showing 3 related works from this author

The polarimetric and helioseismic imager on solar orbiter

2020

This paper describes the Polarimetric and Helioseismic Imager on the Solar Orbiter mission (SO/PHI), the first magnetograph and helioseismology instrument to observe the Sun from outside the Sun-Earth line. It is the key instrument meant to address the top-level science question: How does the solar dynamo work and drive connections between the Sun and the heliosphere? SO/PHI will also play an important role in answering the other top-level science questions of Solar Orbiter, as well as hosting the potential of a rich return in further science. SO/PHI measures the Zeeman effect and the Doppler shift in the FeI 617.3nm spectral line. To this end, the instrument carries out narrow-band imaging…

Solar Telescope010504 meteorology & atmospheric sciencesphotosphere [Sun]FiltegramsHighly elliptical orbitFOS: Physical sciencesAstrophysics01 natural scienceslaw.inventionTelescopeOrbiterPhotospherelaw0103 physical sciencesAstrophysics::Solar and Stellar AstrophysicsHelioseismologySolar dynamo010303 astronomy & astrophysicsSun: magnetic fieldsInstrumentation and Methods for Astrophysics (astro-ph.IM)0105 earth and related environmental sciencesSun: helioseismologyPhysics[PHYS]Physics [physics]PhotosphereEllipsometrypolarimeters [Instrumentation]Spacecraftbusiness.industryAstrophysics::Instrumentation and Methods for AstrophysicsAstronomyinstrumentation: polarimetersSun: photosphereHeliosismologiaAstronomy and AstrophysicsAstrophysics - Astrophysics of Galaxiestechniques: polarimetricmagnetic fields [Sun]Space and Planetary Sciencetechniques: imaging spectroscopyAstrophysics of Galaxies (astro-ph.GA)Physics::Space PhysicsHelioseismologyAstrophysics::Earth and Planetary AstrophysicsbusinessAstrophysics - Instrumentation and Methods for Astrophysics[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]HeliosphereEl·lipsometria
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Autonomous on-board data processing and instrument calibration software for the SO/PHI

2018

The extension of on-board data processing capabilities is an attractive option to reduce telemetry for scientific instruments on deep space missions. The challenges that this presents, however, require a comprehensive software system, which operates on the limited resources a data processing unit in space allows. We implemented such a system for the Polarimetric and Helioseismic Imager (PHI) on-board the Solar Orbiter (SO) spacecraft. It ensures autonomous operation to handle long command-response times, easy changing of the processes after new lessons have been learned and meticulous book-keeping of all operations to ensure scientific accuracy. This contribution presents the requirements a…

Flexibility (engineering)Scientific instrumentData processing010504 meteorology & atmospheric sciencesSpacecraftComputer sciencebusiness.industryFrame (networking)FOS: Physical sciencescomputer.software_genre01 natural sciencesData processing systemSoftware frameworkSoftware0103 physical sciencesSystems engineeringSoftware systemAstrophysics - Instrumentation and Methods for AstrophysicsbusinessInstrumentation and Methods for Astrophysics (astro-ph.IM)010303 astronomy & astrophysicscomputer0105 earth and related environmental sciencesSoftware and Cyberinfrastructure for Astronomy V
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Helioseismology with Solar Orbiter

2014

The Solar Orbiter mission, to be launched in July 2017, will carry a suite of remote sensing and in-situ instruments, including the Polarimetric and Helioseismic Imager (PHI). PHI will deliver high-cadence images of the Sun in intensity and Doppler velocity suitable for carrying out novel helioseismic studies. The orbit of the Solar Orbiter spacecraft will reach a solar latitude of up to 21 deg (up to 34 deg by the end of the extended mission) and thus will enable the first local helioseismology studies of the polar regions. Here we consider an array of science objectives to be addressed by helioseismology within the baseline telemetry allocation (51 Gbit per orbit, current baseline) and wi…

Point spread functionPhysicsSunspotSpacecraftbusiness.industryPolarimetryAstronomyFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicslaw.inventionOrbiterAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary SciencelawPhysics::Space PhysicsRadiative transferOrbit (dynamics)Astrophysics::Solar and Stellar AstrophysicsHelioseismologyAstrophysics::Earth and Planetary AstrophysicsbusinessSolar and Stellar Astrophysics (astro-ph.SR)
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