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Dependence of the Martian radiation environment on atmospheric depth: Modeling and measurement

Guo, Jingnan and Slaba, Tony C. and Zeitlin, Cary and Wimmer-Schweingruber, Robert F. and Badavi, Francis F. and Böhm, Eckart and Böttcher, Stephan and Brinza, David E. and Ehresmann, Bent and Hassler, Donald M. and Matthiä, Daniel and Rafkin, Scot (2017) Dependence of the Martian radiation environment on atmospheric depth: Modeling and measurement. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 122, pp. 329-341. Wiley. DOI: 10.1002/2016JE005206 ISSN 2169-9097

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2016JE005206/abstract

Abstract

The energetic particle environment on the Martian surface is influenced by solar and heliospheric modulation and changes in the local atmospheric pressure (or column depth). The Radiation Assessment Detector (RAD) on board the Mars Science Laboratory rover Curiosity on the surface of Mars has been measuring this effect for over four Earth years (about two Martian years). The anticorrelation between the recorded surface Galactic Cosmic Ray-induced dose rates and pressure changes has been investigated by Rafkin et al. (2014) and the long-term solar modulation has also been empirically analyzed and modeled by Guo et al. (2015). This paper employs the newly updated HZETRN2015 code to model the Martian atmospheric shielding effect on the accumulated dose rates and the change of this effect under different solar modulation and atmospheric conditions. The modeled results are compared with the most up-to-date (from 14 August 2012 to 29 June 2016) observations of the RAD instrument on the surface of Mars. Both model and measurements agree reasonably well and show the atmospheric shielding effect under weak solar modulation conditions and the decline of this effect as solar modulation becomes stronger. This result is important for better risk estimations of future human explorations to Mars under different heliospheric and Martian atmospheric conditions.

Item URL in elib:https://elib.dlr.de/111514/
Document Type:Article
Title:Dependence of the Martian radiation environment on atmospheric depth: Modeling and measurement
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Guo, Jingnaninstitute for experimental and applied physics, christian albrechts university kiel, kiel, germanyUNSPECIFIED
Slaba, Tony C.NASA Langley, Research Center, Hampton, Virginia, USAUNSPECIFIED
Zeitlin, CaryLockheed Martin IS and GS, Oakland, California, USAUNSPECIFIED
Wimmer-Schweingruber, Robert F.institute for experimental and applied physics, christian albrechts university kiel, kiel, germanyUNSPECIFIED
Badavi, Francis F.Old Dominion University Research Foundation, Norfolk, Virginia, USAUNSPECIFIED
Böhm, Eckartinstitute for experimental and applied physics, christian albrechts university kiel, kiel, germanyUNSPECIFIED
Böttcher, Stephaninstitute for experimental and applied physics, christian albrechts university kiel, kiel, germanyUNSPECIFIED
Brinza, David E.Jet Propulsion Laboratory, California Institute of Technology, Pasadena California, USAUNSPECIFIED
Ehresmann, BentSpace Science and Engineering Division, Southwest Research Institute, Boulder, Colorado, USAUNSPECIFIED
Hassler, Donald M.Space Science and Engineering Division, Southwest Research Institute, Boulder, Colorado, USA and L’institut D’astrophysique Spatiale, Orsay, FranceUNSPECIFIED
Matthiä, Danielgerman aerospace center, institute of aerospace medicine, linder höhe, 51147 köln, germanyhttps://orcid.org/0000-0003-1507-0143
Rafkin, ScotSpace Science and Engineering Division, Southwest Research Institute, Boulder, Colorado, USAUNSPECIFIED
Date:2017
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:122
DOI :10.1002/2016JE005206
Page Range:pp. 329-341
Publisher:Wiley
ISSN:2169-9097
Status:Published
Keywords:Radiation Assessment Detector (RAD), Mars Science Laboratory, rover Curiosity, Mars: atmosphere, GCR: solar modulations, space exploration: Radiation, space vehicles: instruments, instrumentation: detectors, planetary atmospheres
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben MSL-Radiation, R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:05 Apr 2017 16:46
Last Modified:31 Jul 2019 20:08

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