Plasma Wave Investigation (PWI) Aboard BepiColombo Mio on the Trip to the First Measurement of Electric Fields, Electrom
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Plasma Wave Investigation (PWI) Aboard BepiColombo Mio on the Trip to the First Measurement of Electric Fields, Electromagnetic Waves, and Radio Waves Around Mercury Yasumasa Kasaba1 · Hirotsugu Kojima2 · Michel Moncuquet3 · Jan-Erik Wahlund4 · Satoshi Yagitani5 · Fouad Sahraoui6 · Pierre Henri7,8 · Tomas Karlsson9 · Yoshiya Kasahara5 · Atsushi Kumamoto10 · Keigo Ishisaka11 · Karine Issautier3 · Gaëtan Wattieaux12 · Tomohiko Imachi5 · Shoya Matsuda13 · Janos Lichtenberger14,15 · Hideyuki Usui16 Received: 11 December 2019 / Accepted: 12 May 2020 © Springer Nature B.V. 2020
Abstract The Plasma Wave Investigation (PWI) aboard the BepiColombo Mio (Mercury Magnetospheric Orbiter, MMO) will enable the first observations of electric fields, plasma waves, and radio waves in and around the Hermean magnetosphere and exosphere. The The BepiColombo mission to Mercury Edited by Johannes Benkhoff, Go Murakami and Ayako Matsuoka
B Y. Kasaba
[email protected]
1
Planetary Plasma and Atmospheric Research Center, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
2
Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan
3
LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5, Place Jules Janssen 92195 Meudon, France
4
Swedish Institute of Space Physics, Box 537, 751 21 Uppsala, Sweden
5
Advanced Research Center for Space Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
6
Laboratoire de Physique des Plasmas, CNRS, Ecole Polytechnique, Sorbonne Université, Observatoire de Paris-Meudon & Université Paris-Saclay, Route de Saclay, 91120 France
7
LPC2E, CNRS, Université d’Orléans, CNES, Orléans, France
8
Laboratoire Lagrange, OCA, CNRS, UCA, Nice, France
9
Alfven Laboratory, Royal Institute of Technology, 10044 Stockholm, Sweden
10
Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
11
Department of Electronics and Informatics, Toyama Prefectural University, Imizu, Toyama 939-0398, Japan
12
LAPLACE, Université de Toulouse, Toulouse, France
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PWI has two sets of receivers (EWO with AM2 P, SORBET) connected to two electric field sensors (MEFISTO and WPT) and two magnetic field sensors (SCM: LF-SC and DB-SC). After the launch on October 20, 2018, we began initial operations, confirmed that all receivers were functioning properly, and released the launch locks on the sensors. Those sensors are not deployed during the cruising phase, but the PWI is still capable performing magnetic field observations. After full deployment of all sensors following insertion into Mercury orbit, the PWI will start its measurements of the electric field from DC to 10 MHz using two dipole antennae with a 32-m tip-to-tip length in the spin plane and the magnetic field from 0.3 Hz to 20 kHz using a three-axis sensor and from 2.5 kHz to 640 kHz using a single-axis sensor at the tip of a 4.5-m solid boom e
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