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Comparison of Dust Impact and Solitary Wave Signatures Detected by Multiple Electric Field Antennas Onboard the MMS Spacecraft
Author(s) -
Vaverka Jakub,
Nakamura Takuji,
Kero Johan,
Mann Ingrid,
De Spiegeleer Alexandre,
Hamrin Maria,
Norberg Carol,
Lindqvist PerArne,
PellinenWannberg Asta
Publication year - 2018
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1029/2018ja025380
Subject(s) - spacecraft , electric field , physics , remote sensing , antenna (radio) , spacecraft charging , millimeter , field (mathematics) , aerospace engineering , environmental science , computer science , telecommunications , astronomy , geology , engineering , mathematics , quantum mechanics , pure mathematics
Dust impact detection by electric field instruments is a relatively new method. However, the influence of dust impacts on electric field measurements is not completely understood and explained. A better understanding is very important for reliable dust impact identification, especially in environments with low dust impact rate. Using data from Earth‐orbiting Magnetospheric Multiscale mission (MMS) spacecraft, we present a study of various pulses detected simultaneously by multiple electric field antennas in the monopole (probe‐to‐spacecraft potential measurement) and dipole (probe‐to‐probe potential measurement) configurations. The study includes data obtained during an impact of a millimeter‐sized object. We show that the identification of dust impacts by a single antenna is a very challenging issue in environments where solitary waves are commonly present and that some pulses can be easily misinterpreted as dust impacts. We used data from multiple antennas to distinguish between changes in the spacecraft potential (dust impact) and structures in the ambient plasma or electric field. Our results indicate that an impact cloud is in some cases able to influence the potential of the electric field antenna during its expansion.