Cassini RPWS Dust Observation Near the Janus/Epimetheus Orbit

S. -Y. Ye; W. S. Kurth; G. B. Hospodarsky; A. M. Persoon; D. A. Gurnett; M. Morooka; J. -E. Wahlund; H. -W. Hsu; M. Seiss; R. Srama

doi:10.1029/2017JA025112

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Cassini RPWS Dust Observation Near the Janus/Epimetheus Orbit

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Cassini RPWS Dust Observation Near the Janus/Epimetheus Orbit

S. -Y. Ye, W. S. Kurth, G. B. Hospodarsky, A. M. Persoon, D. A. Gurnett, M. Morooka, J. -E. Wahlund, H. -W. Hsu, M. Seiss and R. Srama

Journal of geophysical research. Space physics, Vol.123(6), pp.4952-4960

06/01/2018

DOI: 10.1029/2017JA025112

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Abstract

During the Ring Grazing orbits near the end of Cassini mission, the spacecraft crossed the equatorial plane near the orbit of Janus/Epimetheus (similar to 2.5 Rs). This region is populated with dust particles that can be detected by the Radio and Plasma Wave Science (RPWS) instrument via an electric field antenna signal. Analysis of the voltage waveforms recorded on the RPWS antennas provides estimations of the density and size distribution of the dust particles. Measured RPWS profiles, fitted with Lorentzian functions, are shown to be mostly consistent with the Cosmic Dust Analyzer, the dedicated dust instrument on board Cassini. The thickness of the dusty ring varies between 600 and 1,000 km. The peak location shifts north and south within 100 km of the ring plane, likely a function of the precession phase of Janus orbit.

Astronomy & Astrophysics

Physical Sciences

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Details

Title: Subtitle: Cassini RPWS Dust Observation Near the Janus/Epimetheus Orbit
Creators: S. -Y. Ye - University of Iowa
W. S. Kurth - University of Iowa
G. B. Hospodarsky - University of Iowa
A. M. Persoon - University of Iowa
D. A. Gurnett - University of Iowa
M. Morooka - Swedish Institute of Space Physics
J. -E. Wahlund - Swedish Institute of Space Physics
H. -W. Hsu - Laboratory for Atmospheric and Space Physics
M. Seiss - University of Potsdam
R. Srama - University of Stuttgart
Resource Type: Journal article
Publication Details: Journal of geophysical research. Space physics, Vol.123(6), pp.4952-4960
DOI: 10.1029/2017JA025112
ISSN: 2169-9380
eISSN: 2169-9402
Publisher: Amer Geophysical Union
Number of pages: 9
Grant note: OH 1401 / Deutsches Zentrum fur Luft-und Raumfahrt; Helmholtz Association; German Aerospace Centre (DLR) 1415150 / NASA; National Aeronautics & Space Administration (NASA) Jet Propulsion Laboratory; National Aeronautics & Space Administration (NASA)
Language: English
Date published: 06/01/2018
Academic Unit: Physics and Astronomy
Record Identifier: 9984455285102771

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