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Directionality of the Martian Surface Radiation and Derivation of the Upward Albedo Radiation

Guo, Jingnan and Khaksarighiri, Salman and Wimmer‐Schweingruber, Robert F. and Hassler, Donald M. and Ehresmann, Bent and Zeitlin, Cary and Löffler, Sven and Matthiä, Daniel and Berger, Thomas and Reitz, Günther and Calef, Fred (2021) Directionality of the Martian Surface Radiation and Derivation of the Upward Albedo Radiation. Geophysical Research Letters, 48 (15), e2021GL093912. Wiley. doi: 10.1029/2021GL093912. ISSN 0094-8276.

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Official URL: https://doi.org/10.1029/2021GL093912

Abstract

Since 2012 August, the Radiation Assessment Detector (RAD) on the Curiosity rover has been characterizing the Martian surface radiation field which is essential in preparation for future crewed Mars missions. RAD observed radiation dose is influenced by variable topographical features as the rover traverses through the terrain. In particular, while Curiosity was parked near a butte in the Murray Buttes area, we find a decrease of the dose rate by (5+1)% as 19% of the sky was obstructed, versus 10% in an average reference period. Combining a zenith-angle-dependent radiation model and the rover panoramic visibility map leads to a predicted reduction of the downward dose by ~12% due to the obstruction, larger than the observed decrease. With the hypothesis that this difference is attributable to albedo radiation coming from the butte, we estimate the (flat-terrain) albedo radiation to be about 19% of the total surface dose.

Item URL in elib:https://elib.dlr.de/143278/
Document Type:Article
Title:Directionality of the Martian Surface Radiation and Derivation of the Upward Albedo Radiation
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Guo, JingnanSchool of Earth and Space Sciences, University of Science and Technology of China, Hefei, PR China and CAS Center for Excellence in Comparative Planetology, USTC, Hefei, PR China and Institute of Experimental and Applied Physics, CAU Kiel, Kiel, GermanyUNSPECIFIED
Khaksarighiri, SalmanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Wimmer‐Schweingruber, Robert F.Institute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, Germanyhttps://orcid.org/0000-0002-7388-173X
Hassler, Donald M.Planetary Science Division, Southwest Research Institute, Boulder, CO, USAUNSPECIFIED
Ehresmann, BentPlanetary Science Division, Southwest Research Institute, Boulder, CO, USAUNSPECIFIED
Zeitlin, CaryLeidos Corporation, Houston, TX, USAUNSPECIFIED
Löffler, SvenInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Matthiä, DanielUNSPECIFIEDhttps://orcid.org/0000-0003-1507-0143
Berger, ThomasUNSPECIFIEDhttps://orcid.org/0000-0003-3319-5740
Reitz, GüntherUNSPECIFIEDhttps://orcid.org/0000-0001-5045-0761
Calef, FredJet Propulsion Laboratory, California Institute of Technology, Pasadina, CA, USAUNSPECIFIED
Date:16 July 2021
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:48
DOI:10.1029/2021GL093912
Page Range:e2021GL093912
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Radiation Assessment Detector (RAD), Curiosity rover, Mars, radiation dose
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Moon and Mars Exploration Studies (MosES)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:31 Aug 2021 12:53
Last Modified:31 Aug 2021 12:53

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