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  A Multi-purpose Heliophysics L4 Mission

Posner, A., Arge, C. N., Staub, J., StCyr, O. C., Folta, D., Solanki, S. K., et al. (2021). A Multi-purpose Heliophysics L4 Mission. Space Weather, 19(9): e2021SW002777. doi:10.1029/2021SW002777.

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 Creators:
Posner, A., Author
Arge, C. N., Author
Staub, Jan1, Author              
StCyr, O. C., Author
Folta, D., Author
Solanki, Sami K.1, Author              
Strauss, R. D. T., Author
Effenberger, F., Author
Gandorfer, Achim M.1, Author              
Heber, B., Author
Henney, C. J., Author
Hirzberger, Johann1, Author              
Jones, S. I., Author
Kühl, P., Author
Malandraki, O., Author
Sterken, V. J., Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: The Earth-Sun Lagrangian point 4 is a meta-stable location at 1 au from the Sun, 60° ahead of Earth's orbit. It has an uninterrupted view of the solar photosphere centered on W60, the Earth's nominal magnetic field connection to the Sun. Such a mission on its own would serve as a solar remote sensing observatory that would oversee the entire solar radiation hemisphere with significant relevance for protecting Moon and Mars explorers from radiation exposure. In combination with appropriately planned observatories at L1 and L5, the three spacecraft would provide 300° longitude coverage of photospheric magnetic field structure, and allow continuous viewing of both solar poles, with >3.6° elevation. Ideally, the L4 and L5 missions would orbit the Sun with a 7.2° inclination out of the heliographic equator, 14.5° out of the ecliptic plane. We discuss the impact of extending solar magnetic field observations in both longitude and latitude to improve global solar wind modeling and, with the development of local helioseismology, the potential for long-term solar activity forecasting. Such a mission would provide a unique opportunity for interplanetary and interstellar dust science. It would significantly add to reliability of operational observations on fast coronal mass ejections directed at Earth and for human Mars explorers on their round-trip journey. The L4 mission concept is technically feasible, and is scientifically compelling.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2021SW002777
 Degree: -

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Title: Space Weather
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 19 (9) Sequence Number: e2021SW002777 Start / End Page: - Identifier: ISSN: 1539-4956
CoNE: https://pure.mpg.de/cone/journals/resource/991042728134110