Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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Opening New Horizons with the L4 Mission: Vision and Plan

  • Received : 2023.11.19
  • Accepted : 2023.12.04
  • Published : 2023.12.30
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Abstract

The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.

Keywords

Acknowledgement

This work was supported the Korea Astronomy and Space Science Institute under the R&D program (KASI2022E90190). KSC thanks to Arik Posner, Young-Deuk Park, Yu Yi, Kyoung Wook Min, Jae-Hung Han, Hong-Bae Kim, Maria Majeska, and Valery Nakariakov for their constructive comments and suggestions for the L4 missions. RSK acknowledges a support from the National Research Foundation of Korea (NRF2020K2A9AH06102061). SHP was supported by basic research funding from the Korea Astronomy and Space Science Institute (KASI2023185007). VJS received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement (N851544-ASTRODUST).

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