Sources of ionospheric variability at Mars

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Title: Sources of ionospheric variability at Mars
Authors: Mendillo, M
Narvaez, C
Vogt, MF
Mayyasi, M
Forbes, J
Galand, M
Thiemann, E
Benna, M
Eparvier, F
Chamberlin, P
Mahaffy, P
Andersson, L
Item Type: Journal Article
Abstract: During the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission's deep-dip #2 campaign of 17–22 April 2015, spacecraft instruments observed all of the physical parameters needed to assess the photo-chemical-equilibrium (PCE) explanation for ionospheric variability at a fixed altitude (135 km) near the peak of the Martian ionosphere. MAVEN measurements of electron density, electron temperature, neutral CO2 density, and solar irradiance were collected during 28 orbits. When inserted into the PCE equation, the measurements of varying PCE drivers correlated with the observed electron density variations to within instrumental uncertainty levels. The dominant source of this positive correlation was the variability of CO2 densities associated with the longitudinal wave-2 component of nonmigrating tides in the Martian thermosphere.
Issue Date: 19-Sep-2017
Date of Acceptance: 7-Jul-2017
URI: http://hdl.handle.net/10044/1/56687
DOI: https://dx.doi.org/10.1002/2017JA024366
ISSN: 2169-9380
Publisher: American Geophysical Union
Start Page: 9670
End Page: 9684
Journal / Book Title: Journal of Geophysical Research: Space Physics
Volume: 122
Issue: 9
Copyright Statement: ©2017. American Geophysical Union. All Rights Reserved. This is the accepted version of the following article, which has been published in final form athttp://onlinelibrary.wiley.com/doi/10.1002/2017JA024366/abstract
Sponsor/Funder: Imperial College Trust
Science and Technology Facilities Council (STFC)
Funder's Grant Number: N/A
ST/N000692/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
PEAK ELECTRON-DENSITIES
SURVEYOR ACCELEROMETER DATA
MARTIAN IONOSPHERE
UPPER-ATMOSPHERE
MGS ACCELEROMETER
RADAR SOUNDINGS
SOLAR-CYCLE
MAVEN
TIDES
MODEL
Publication Status: Published
Appears in Collections:Space and Atmospheric Physics
Physics
Faculty of Natural Sciences



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