The influence of sunspot number on high frequency radio propagation

R. A. Malik, Mardina Abdullah, Abdullah Sabirin, M. J. Homam

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

1 Citation (Scopus)

Abstract

This paper aims to study the influence of sunspot number on High Frequency (HF) radio communications in Peninsular Malaysia for the years 2009 to 2011. Sunspots, which are a natural phenomenon that occurs due to magnetic activities on the Sun's surface, can be counted using smoothed sunspot number (SSN). HF signal propagates through the ionosphere where the ionospheric properties have been ionized by flares and prominences from sunspot number. This has significant effect on the stability of the ionosphere, resulting in the frequencies that can be used for HF communications to vary depending on the time of day, season, year and the 11-year solar cycle. This study was carried out during a period when the sunspot values rose from a low level in 2009 to a much higher level in 2011, making it suitable to observe the influence of sunspot number values on the HF frequencies employed. Maximum Usable Frequency (MUF) was determined based on HF transmission tests that were conducted from April 2009 to September 2011. It was observed that as the SSN values increase, the range of the operating HF frequencies and the numbers of frequencies that can be used also increase. This will, therefore, affect the median frequency that can be used for daily and monthly HF communications.

Original languageEnglish
Title of host publication2014 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Proceeding
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages107-110
Number of pages4
ISBN (Print)9781479966035
DOIs
Publication statusPublished - 17 Feb 2015
Event2014 6th IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Johor Bahru
Duration: 8 Dec 201410 Dec 2014

Other

Other2014 6th IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014
CityJohor Bahru
Period8/12/1410/12/14

Fingerprint

Radio transmission
Ionosphere
Radio communication
Communication
Sun

Keywords

  • High frequency
  • ionosphere
  • maximum usable frequency
  • radio propagation
  • sunspot number

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Malik, R. A., Abdullah, M., Sabirin, A., & Homam, M. J. (2015). The influence of sunspot number on high frequency radio propagation. In 2014 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Proceeding (pp. 107-110). [7043753] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APACE.2014.7043753

The influence of sunspot number on high frequency radio propagation. / Malik, R. A.; Abdullah, Mardina; Sabirin, Abdullah; Homam, M. J.

2014 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Proceeding. Institute of Electrical and Electronics Engineers Inc., 2015. p. 107-110 7043753.

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

Malik, RA, Abdullah, M, Sabirin, A & Homam, MJ 2015, The influence of sunspot number on high frequency radio propagation. in 2014 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Proceeding., 7043753, Institute of Electrical and Electronics Engineers Inc., pp. 107-110, 2014 6th IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014, Johor Bahru, 8/12/14. https://doi.org/10.1109/APACE.2014.7043753
Malik RA, Abdullah M, Sabirin A, Homam MJ. The influence of sunspot number on high frequency radio propagation. In 2014 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Proceeding. Institute of Electrical and Electronics Engineers Inc. 2015. p. 107-110. 7043753 https://doi.org/10.1109/APACE.2014.7043753
Malik, R. A. ; Abdullah, Mardina ; Sabirin, Abdullah ; Homam, M. J. / The influence of sunspot number on high frequency radio propagation. 2014 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2014 - Proceeding. Institute of Electrical and Electronics Engineers Inc., 2015. pp. 107-110
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