Search Results - "Morooka, Michiko"
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Estimating the optical depth of Saturn’s main rings using the Cassini Langmuir Probe
Published in Monthly notices of the Royal Astronomical Society (20-10-2023)“…Abstract A Langmuir Probe (LP) measures currents from incident charged particles as a function of the applied bias voltage. While onboard a spacecraft the…”
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In situ measurements of Saturn's ionosphere show that it is dynamic and interacts with the rings
Published in Science (American Association for the Advancement of Science) (05-01-2018)“…The ionized upper layer of Saturn's atmosphere, its ionosphere, provides a closure of currents mediated by the magnetic field to other electrically charged…”
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The MEFISTO and WPT Electric Field Sensors of the Plasma Wave Investigation on the BepiColombo Mio Spacecraft: Measurements of Low and High Frequency Electric Fields at Mercury
Published in Space science reviews (2020)“…This paper describes the design of MEFISTO (Mercury Electric Field In-Situ Tool) and WPT (Wire Probe Antenna) electric field sensors for Plasma Wave…”
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Enceladus and Titan: emerging worlds of the Solar System
Published in Experimental astronomy (2022)“…Some of the major discoveries of the recent Cassini-Huygens mission have put Titan and Enceladus firmly on the Solar System map. The mission has revolutionised…”
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Science return of probing magnetospheric systems of ice giants
Published in Frontiers in astronomy and space sciences (13-03-2024)“…The magnetospheric systems of ice giants, as the ideal and the unique template of a typical class of exoplanets, have not been sufficiently studied in the past…”
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Dust–plasma interaction through magnetosphere–ionosphere coupling in Saturn’s plasma disk
Published in Planetary and space science (01-01-2013)“…The ion bulk speeds in the equatorial region of Saturn’s inner magnetosphere, according to data from the Langmuir Probe (LP) on board the Cassini spacecraft,…”
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Magnetic Holes in the Solar Wind and Magnetosheath Near Mercury
Published in Journal of geophysical research. Space physics (01-05-2021)“…We present a comprehensive statistical study of magnetic holes, defined as localized decreases of the magnetic field strength of at least 50%, in the solar…”
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Investigating Mercury's Environment with the Two-Spacecraft BepiColombo Mission
Published in Space science reviews (2020)“…The ESA-JAXA BepiColombo mission will provide simultaneous measurements from two spacecraft, offering an unprecedented opportunity to investigate…”
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Nonconjugacy of pulsating auroral patches near L=6
Published in Geophysical research letters (15-10-1998)“…Simultaneous TV data of pulsating auroras were obtained at two nearly conjugate stations, Husafell in Iceland and Syowa in Antarctica on September 9–10, 1994…”
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10
Chemical interactions between Saturn's atmosphere and its rings
Published in Science (American Association for the Advancement of Science) (05-10-2018)“…The Pioneer and Voyager spacecraft made close-up measurements of Saturn's ionosphere and upper atmosphere in the 1970s and 1980s that suggested a chemical…”
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Ion‐Acoustic Waves Associated With Interplanetary Shocks
Published in Geophysical research letters (28-08-2024)“…Ion‐acoustic waves (IAWs) commonly occur near interplanetary (IP) shocks. These waves are important because of their potential role in the dissipation required…”
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Models of Saturn's Equatorial Ionosphere Based on In Situ Data From Cassini's Grand Finale
Published in Geophysical research letters (28-09-2018)“…We present new models of Saturn's equatorial ionosphere based on the first in situ measurements of its upper atmosphere. The neutral spectrum measured by…”
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Re‐Analysis of the Cassini RPWS/LP Data in Titan's Ionosphere: 1. Detection of Several Electron Populations
Published in Journal of geophysical research. Space physics (01-08-2021)“…Current models of Titan's ionosphere have difficulties in explaining the observed electron density and/or temperature. In order to get new insights, we…”
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Re‐Analysis of the Cassini RPWS/LP Data in Titan's Ionosphere: 2. Statistics on 57 Flybys
Published in Journal of geophysical research. Space physics (01-08-2021)“…The ionosphere of Titan hosts a complex ion chemistry leading to the formation of organic dust below 1,200 km. Current models cannot fully explain the observed…”
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The low-frequency source of Saturn's kilometric radiation
Published in Science (American Association for the Advancement of Science) (05-10-2018)“…Understanding how auroral radio emissions are produced by magnetized bodies requires in situ measurements within their source region. Saturn's kilometric…”
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Saturn's Dusty Ionosphere
Published in Journal of geophysical research. Space physics (01-03-2019)“…Measurements of electrons and ions in Saturn's ionosphere down to 1,500‐km altitudes as well as the ring crossing region above the ionosphere obtained by the…”
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Saturn's Ionosphere: Electron Density Altitude Profiles and D‐Ring Interaction From The Cassini Grand Finale
Published in Geophysical research letters (28-08-2019)“…We present the electron density (ne) altitude profiles of Saturn's ionosphere at near‐equatorial latitudes from all 23 orbits of Cassini's Grand Finale. The…”
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Cassini‐Plasma Interaction Simulations Revealing the Cassini Ion Wake Characteristics: Implications for In‐Situ Data Analyses and Ion Temperature Estimates
Published in Journal of geophysical research. Space physics (01-08-2021)“…We have used Spacecraft Plasma Interaction Software (SPIS) simulations to study the characteristics (i.e., dimensions, ion depletion, and evolution with the…”
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The Structure of Planetary Period Oscillations in Saturn's Equatorial Magnetosphere: Results From the Cassini Mission
Published in Journal of geophysical research. Space physics (01-11-2019)“…Saturn's magnetospheric magnetic field, planetary radio emissions, plasma populations, and magnetospheric structure are all known to be modulated at periods…”
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Dusty plasma in the vicinity of Enceladus
Published in Journal of Geophysical Research (01-12-2011)“…We present in situ Cassini Radio Plasma Wave Science observations in the vicinity of Enceladus and in the E ring of Saturn that indicate the presence of dusty…”
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