In Situ Data and Effect Correlation During September 2017 Solar Particle Event

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • P. Jiggens
  • C. Clavie
  • H. Evans
  • T. P. O'Brien
  • O. Witasse
  • A. L. Mishev
  • P. Nieminen
  • E. Daly
  • V. Kalegaev
  • N. Vlasova
  • S. Borisov
  • S. Benck
  • C. Poivey
  • M. Cyamukungu
  • J. Mazur
  • D. Heynderickx
  • I. Sandberg
  • T. Berger
  • I. G. Usoskin
  • M. Paassilta
  • R. Vainio
  • U. Straube
  • D. Müller
  • B. Sánchez-Cano
  • D. Hassler
  • H. Leppinen
  • A. Punkkinen
  • S. Aminalragia-Giamini
  • T. Nagatsuma

Research units

  • ESTEC - European Space Research and Technology Centre
  • Aerospace Corporation
  • University of Oulu
  • Lomonosov Moscow State University
  • Universite Catholique de Louvain
  • DH Consultancy BVBA
  • Space Applications and Research Consultancy (SPARC)
  • German Aerospace Center
  • University of Turku
  • European Space Agency - ESA
  • University of Leicester
  • Southwest Research Institute
  • Space Systems Finland Oy
  • Japan National Institute of Information and Communications Technology

Abstract

Solar energetic particles are one of the main sources of particle radiation seen in space. In the first part of September 2017 the most active solar period of cycle 24 produced four large X-class flares and a series of (interplanetary) coronal mass ejections, which gave rise to radiation storms seen over all energies and at the ground by neutron monitors. This paper presents comprehensive cross comparisons of in situ radiation detector data from near-Earth satellites to give an appraisal on the state of present data processing for monitors of such particles. Many of these data sets have been the target of previous cross calibrations, and this event with a hard spectrum provides the opportunity to validate these results. As a result of the excellent agreement found between these data sets and the use of neutron monitor data, this paper also presents an analytical expression for fluence spectrum for the event. Derived ionizing dose values have been computed to show that although there is a significant high-energy component, the event was not particularly concerning as regards dose effects in spacecraft electronics. Several sets of spacecraft data illustrating single event effects are presented showing a more significant impact in this regard. Such a hard event can penetrate thick shielding; human dose quantities measured inside the International Space Station and derived through modeling for aircraft altitudes are also presented. Lastly, simulation results of coronal mass ejection propagation through the heliosphere are presented along with data from Mars-orbiting spacecraft in addition to data from the Mars surface.

Details

Original languageEnglish
Pages (from-to)99-117
Number of pages19
JournalSpace Weather
Volume17
Issue number1
Publication statusPublished - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • dose, GLE, radiation, SEEs, SEP, SPE

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