Cited by 54Planetary Science and ExplorationAstro and Planetary ScienceRadiation Therapy and Dosimetry

MODELING THE VARIATIONS OF DOSE RATE MEASURED BY RAD DURING THE FIRST MSL MARTIAN YEAR: 2012–2014

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Guo, Jingnan, Zeitlin, Cary, Wimmer-Schweingruber, Robert F., Rafkin, Scot, Hassler, Donald M., Posner, Arik, Heber, Bernd, Köhler, Jan +10 more·2015·The Astrophysical Journal

Abstract

The Radiation Assessment Detector (RAD), on board Mars Science Laboratory 's ( MSL ) rover Curiosity, measures the energy spectra of both energetic charged and neutral particles along with the radiation dose rate at the surface of Mars. With these first-ever measurements on the Martian surface, RAD observed several effects influencing the galactic cosmic-ray (GCR) induced surface radiation dose concurrently: (a) short-term diurnal variations of the Martian atmospheric pressure caused by daily thermal tides, (b) long-term seasonal pressure changes in the Martian atmosphere, and (c) the modulation of the primary GCR flux by the heliospheric magnetic field, which correlates with long-term solar activity and the rotation of the Sun. The RAD surface dose measurements, along with the surface pressure data and the solar modulation factor, are analyzed and fitted to empirical models that quantitatively demonstrate how the long-term influences ((b) and (c)) are related to the measured dose rates. Correspondingly, we can estimate dose rate and dose equivalents under different solar modulations and different atmospheric conditions, thus allowing empirical predictions of the Martian surface radiation environment.

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  1. Boynton, W., Feldman, W., Mitrofanov, I., et al. 2004, in 2001 Mars Odyssey, ed. C. T. Russell (Berlin: Springer)
  2. Heber, B., Fichtner, H., & Scherer, K. 2007, Solar Variability and Planetary Climates, ed. Y. Calisesi et al. (Berlin: Springer)

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Authors
Guo, J., Zeitlin, C., Wimmer-Schweingruber, R. F., Rafkin, S., Hassler, D. M., Posner, A., Heber, B., Köhler, J., Ehresmann, B., Appel, J. K., Böhm, E., Böttcher, S., Burmeister, S., Brinza, D. E., Lohf, H., Martin, C., Kahanpää, H., & Reitz, G.
Affiliations
  • Christian-Albrechts-Universität zu Kiel (DE)
  • Southwest Research Institute (US)
  • National Aeronautics and Space Administration (US)
  • Jet Propulsion Laboratory (US)
  • Finnish Meteorological Institute (FI)
  • Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) (DE)
Corresponding author
Guo, Jingnan
Venue
The Astrophysical Journal
Published
2015-08-27
Volume
810
Issue
1
Pages
24
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W1907687381
Cited by
54
References
44
Citations by year
2025: 3 · 2024: 5 · 2023: 4 · 2022: 4 · 2021: 5 · 2020: 7 · 2019: 6 · 2018: 6 · 2017: 10 · 2016: 4
FWCI
3.79
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal (publishedVersion)
  • elib (German Aerospace Center) (acceptedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Aeronautics and Space Administration (50QM1201, 50QM0501, 1273039)
  • California Institute of Technology
  • Southwest Research Institute (1273039)
  • Oulun Yliopisto
  • Jet Propulsion Laboratory (1273039)
  • University of California, Los Angeles
  • Human Exploration and Operations Mission Directorate
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Radiation Therapy and Dosimetry
Keywords
galactic cosmic rays, Radiation Assessment Detector, Curiosity rover, Mars Science Laboratory, radiation dose rate, solar modulation, heliospheric magnetic field, atmospheric pressure variation, thermal tides, dose equivalent, empirical model, Mars radiation environment

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