Variation of galactic cosmic rays near earth equator based on selected neutron monitors

Wayan Suparta, Siti Katrina Zulkeple, Mhd Fairos Asillam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Razaksat-1 is Malaysia's second remote sensing satellite that orbits at altitude of 685 km and at 9° inclination. A year after its launch, communication to the satellite was lost. Hence, this study is part of a research aimed to investigate whether space radiation is the cause behind its failure by focusing on the variation of galactic cosmic ray (GCRs) particles within the equatorial region. Study on GCR was based on real measurements taken in three years period (14 July 2009-14 July 2012) from selected neutron monitors (NM) in four different regions with satellite data from Cosmic Ray Isotope Spectrometer (CRIS) onboard Advanced Composition Explorer (ACE). The regions included North/East, North/West, South/East and the South Pole. The NM represented them were respectively Princess Sirindhorn NM (PSNM), Newark NM, Kingston NM and South Pole NM. Results showed that PSNM, as being the closest to the equator, had the highest neutron counts but the lowest cosmic ray variations in comparison with those at the higher latitude. There was a sudden neutron drop in March 2012 where no GCR flux was detected by ACE/CRIS for 10 days. More ACE/CRIS data were absent in certain times in 2011 and 2012. Comparison with OMNI data revealed that there was an increase of solar activity during these times. Prior to communication loss, it is found that solar protons are not responsible for the loss while high neutron peaks were detected in late 2009 to early 2010, indicating possible GCRs influence.

Original languageEnglish
Title of host publicationInternational Conference on Space Science and Communication, IconSpace
PublisherIEEE Computer Society
Pages323-328
Number of pages6
Volume2015-September
ISBN (Print)9781479919406
DOIs
Publication statusPublished - 29 Sep 2015
Event4th International Conference on Space Science and Communication, IconSpace 2015 - Langkawi, Malaysia
Duration: 10 Aug 201512 Aug 2015

Other

Other4th International Conference on Space Science and Communication, IconSpace 2015
CountryMalaysia
CityLangkawi
Period10/8/1512/8/15

Fingerprint

Cosmic rays
Neutrons
Earth (planet)
Pole
communication
Isotopes
Malaysia
Spectrometers
Satellites
cause
Poles
Chemical analysis
Communication
time
Remote sensing
Protons
Orbits
Fluxes
Radiation

Keywords

  • advanced composition explorer
  • galactic cosmic rays
  • near equator
  • neutron monitor

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Communication

Cite this

Suparta, W., Zulkeple, S. K., & Asillam, M. F. (2015). Variation of galactic cosmic rays near earth equator based on selected neutron monitors. In International Conference on Space Science and Communication, IconSpace (Vol. 2015-September, pp. 323-328). [7283746] IEEE Computer Society. https://doi.org/10.1109/IconSpace.2015.7283746

Variation of galactic cosmic rays near earth equator based on selected neutron monitors. / Suparta, Wayan; Zulkeple, Siti Katrina; Asillam, Mhd Fairos.

International Conference on Space Science and Communication, IconSpace. Vol. 2015-September IEEE Computer Society, 2015. p. 323-328 7283746.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Suparta, W, Zulkeple, SK & Asillam, MF 2015, Variation of galactic cosmic rays near earth equator based on selected neutron monitors. in International Conference on Space Science and Communication, IconSpace. vol. 2015-September, 7283746, IEEE Computer Society, pp. 323-328, 4th International Conference on Space Science and Communication, IconSpace 2015, Langkawi, Malaysia, 10/8/15. https://doi.org/10.1109/IconSpace.2015.7283746
Suparta W, Zulkeple SK, Asillam MF. Variation of galactic cosmic rays near earth equator based on selected neutron monitors. In International Conference on Space Science and Communication, IconSpace. Vol. 2015-September. IEEE Computer Society. 2015. p. 323-328. 7283746 https://doi.org/10.1109/IconSpace.2015.7283746
Suparta, Wayan ; Zulkeple, Siti Katrina ; Asillam, Mhd Fairos. / Variation of galactic cosmic rays near earth equator based on selected neutron monitors. International Conference on Space Science and Communication, IconSpace. Vol. 2015-September IEEE Computer Society, 2015. pp. 323-328
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