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Solar cosmic ray dose rate assessments during GLE 72 using MIRA and PANDOCA

Matthiä, Daniel and Copeland, Kyle and Meier, Matthias M. (2018) Solar cosmic ray dose rate assessments during GLE 72 using MIRA and PANDOCA. Space Weather Workshop 2018, 16.-20. April 2018, Westminster, Colorado, USA.

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Abstract

Exposure from cosmic radiation at aviation altitudes can be elevated during solar energetic particle events compared to the omnipresent galactic cosmic ray background. The largest of these events can be measured on ground as so-called Ground Level Enhancements (GLE). GLE 72, which occurred 10 Sept. 2017, was the more recent of the two solar particle induced ground level enhancements in solar cycle 24 in which GLEs have been unusually rare. Larger GLEs can significantly increase ionizing radiation dose rates at aviation altitudes for hours to days, leading to concern among crewmembers. One way to provide real time monitoring and preliminary evaluation of solar particle events, including GLEs, in regard to effective dose rates at aviation altitudes is to use real time measurements of the cosmic ray intensity, for instance GOES proton measurements, in combination with numerical models for the calculation of radiation exposure at aviation altitudes. In this work, the PANDOCA and MIRA models which have been developed for this purpose are compared. PANDOCA has been developed by the German Aerospace Center (DLR) and can be applied both to galactic cosmic radiation and solar energetic particle events. MIRA is based on CARI-7A and part of the latest Solar Radiation Alert System (SRAS) of the U.S. Federal Aviation Administration. For GLE72, the models consistently predict increases in the radiation exposure at aviation altitudes, i.e. below 50000 ft, which were on the order of or below the galactic cosmic ray background. Increases in dose rate were limited to high latitudes as the primary solar particles were strongly suppressed by the geomagnetic shielding.

Item URL in elib:https://elib.dlr.de/120265/
Document Type:Conference or Workshop Item (Poster)
Title:Solar cosmic ray dose rate assessments during GLE 72 using MIRA and PANDOCA
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Matthiä, DanielRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; Daniel.Matthiae (at) dlr.dehttps://orcid.org/0000-0003-1507-0143
Copeland, KyleFederal Aviation Administration Civil Aerospace Medical Institute, Oklahoma City, Oklahoma, USA.UNSPECIFIED
Meier, Matthias M.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; Matthias.Meier (at) dlr.dehttps://orcid.org/0000-0003-0918-6473
Date:17 April 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:cosmic radiation, aviation altitudes, PANDOCA and MIRA models
Event Title:Space Weather Workshop 2018
Event Location:Westminster, Colorado, USA
Event Type:Workshop
Event Dates:16.-20. April 2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:29 Jun 2018 10:16
Last Modified:31 Jul 2019 20:17

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