Solar Orbiter reaches a minimum perihelion of 0.28 AU after a series of gravity assists from Venus and Earth, which will also raise the inclination of the orbital plane to at least 30° from the ecliptic plane ( García-Marirrodriga et al. Together, the ten Solar Orbiter instruments will provide a complete description of the plasma making up the solar wind – its origin, transport, and composition –, vastly improving on the Helios mission ( Schwenn & Marsch 1990) launched in 1974. 2013, 2020), currently scheduled to launch in February 2020, will study the solar corona and inner heliosphere with a set of remote-sensing instruments observing the Sun and solar corona and a set of in-situ instruments measuring the solar wind around the spacecraft. The Solar Orbiter mission ( Müller et al. Key words: Sun: corona / zodiacal dust / space vehicles: instruments / telescopes / instrumentation: miscellaneous SoloHI is poised to take its place as a vital contributor to the science success of the Solar Orbiter mission. The performance measurements of the various instrument parameters meet or exceed the requirements derived from the mission science objectives. Finally, a list of planned data products is also presented.Ĭonclusions. The paper discusses the science objectives, including the SoloHI-specific aspects, before presenting the design concepts, which include the optics, mechanical, thermal, electrical, and ground processing. The goal of this paper is to provide details of the SoloHI instrument concept, design, and pre-flight performance to give the potential user of the data a better understanding of how the observations are collected and the sources that contribute to the signal. We present the design and pre-launch performance of the Solar Orbiter Heliospheric Imager (SoloHI) which is an instrument prepared for inclusion in the ESA/NASA Solar Orbiter mission, currently scheduled for launch in 2020. NASA Goddard Space Flight Center, Greenbelt, MD 22070, USAĪSRC Federal Space and Defense, Beltsville, MD 20705, USAĪims. Institut de Recherche en Astrophysique et Planétologie, 31028 Toulouse, France Rutherford Appleton Laboratory, Harwell, Oxford, UK Institut d’Astrophysique Spatiale, Orsay, France Laboratoire Atmosphères, Milieux, Observations Spatiales, Guyancourt, France University of Gottingen, Gottingen, GermanyĬentre Spatiale de Liege, University of Liege, Liege, BelgiumĮuropean Space Research and Technology Centre, Noordwijk, The Netherlands Predictive Sciences Inc., San Diego, CA 92121, USA University of California Los Angeles, Los Angeles, CA 90095, USA Jet Propulsion Laboratory, Pasadena, CA 91011, USA SGT Technologies, Greenbelt MD 20770, USA SRI International, Princeton, NJ 08540, USA Silver Engineering, Inc., Melbourne, FL 32904, USA Space Systems Research Corporation, Alexandria, VA 22314, USA Naval Research Laboratory, Washington, DC 20375, USAĮ-mail: Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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