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The Solar Orbiter Heliospheric Imager (SoloHI)

R. A. Howard 1 A. Vourlidas 2 R. C. Colaninno 1 C. M. Korendyke 1 S. P. Plunkett 1 M. T. Carter 1 D. Wang 1 N. Rich 1 S. Lynch 1 A. Thurn 1 D. G. Socker 1 A. F. Thernisien 1 D. Chua 1 M. G. Linton 1 S. Koss 1 S. Tun-Beltran 1 H. Dennison 1 G. Stenborg 1 D. R. Mcmullin 3 T. Hunt 3 R. Baugh 3 G. Clifford 4 D. Keller 5 J. R. Janesick 5 J. Tower 5 M. Grygon 5 R. Farkas 5 R. Hagood 6 K. Eisenhauer 6 A. Uhl 6 S. Yerushalmi 6 L. Smith 6 P. C. Liewer 7 M. C. Velli 8 J. Linker 9 V. Bothmer 10 P. Rochus 11 J.-P. Halain 12 Philippe Lamy 13 F. Auchère 14 R. A. Harrison 15 A. Rouillard 16 S. Patsourakos 17 O. C. St. Cyr 18 H. Gilbert 18 H. Maldonado 18 C. Mariano 18 J. Cerullo 19
Abstract : Aims. 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. Methods. 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. Results. 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. Finally, a list of planned data products is also presented. Conclusions. The performance measurements of the various instrument parameters meet or exceed the requirements derived from the mission science objectives. SoloHI is poised to take its place as a vital contributor to the science success of the Solar Orbiter mission.
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R. A. Howard, A. Vourlidas, R. C. Colaninno, C. M. Korendyke, S. P. Plunkett, et al.. The Solar Orbiter Heliospheric Imager (SoloHI). Astronomy and Astrophysics - A&A, EDP Sciences, 2020, 642, A13 (23p.). ⟨10.1051/0004-6361/201935202⟩. ⟨insu-03019623⟩

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