Variasi jumlah kandungan elektron ionosfera di Malaysia ketika solar minimum

Translated title of the contribution: Variations total electron content of ionospheric in Malaysia during minimum solar

Siti Aminah Bahari, Mardina Abdullah, Baharudin Yatim

Research output: Contribution to journalArticle

Abstract

The ionosphere is a layer in the Earth's atmosphere where free electrons exist in sufficient numbers to affect the propagation of electromagnetic waves especially the Global Positioning System (GPS) signals. The ionosphere is also known as 'space weather laboratory' as it is directly affected by any activity in space. The influence of the total electron content (TEC) and physical phenomenon regarding the sun-magnetosphere-ionosphere-thermosphere system on satellite and radio communication is constantly changing. The study of the TEC variation in ionosphere and structures is important to ensure the security of radio communication systems, to enhance the currently restricted global ionospheric mapping and accurate space weather forecasting. This paper focused on the variation of TEC during solar minimum. The main objective of this research was to study the variation of TEC over Malaysia on diurnal, seasonal solar and geomagnetic activity using GPS. Since the GPS signals are broadcasted in two widely spread L-band frequency channels L1 and L2 consisting of code and phase, it is possible to determine the TEC using GPS. To achieve this objective, GPS data for year 2007 was obtained from the Department of Survey and Mapping Malaysia (JUPEM) were used in this research. The results over South East Asia showed that the mean TEC during equinox was higher than solstice, whereby 35 TECU was recorded during the equinoxes but only 25 TECU was observed during solstice. It was found that solar variation had more effects on the variation of TEC as compared to the geomagnetic variation. The correlation factor for solar variation was higher, that is 0.64 but yielded only 0.34 for geomagnetic variation. This research was carried out during solar minimum and quiet geomagnetic conditions. Therefore, the results from this research can be used as a reference for the characterization of ionosphere in Malaysia.

Original languageIndonesian
Pages (from-to)1987-1995
Number of pages9
JournalSains Malaysiana
Volume46
Issue number10
DOIs
Publication statusPublished - 1 Oct 2017

Fingerprint

Ionosphere
Electrons
Global positioning system
Radio communication
Weather forecasting
Magnetosphere
Earth atmosphere
Sun
Electromagnetic waves
Frequency bands
Communication systems
Satellites

Keywords

  • GPS
  • Ionosphere
  • Minimum solar

ASJC Scopus subject areas

  • General

Cite this

Variasi jumlah kandungan elektron ionosfera di Malaysia ketika solar minimum. / Bahari, Siti Aminah; Abdullah, Mardina; Yatim, Baharudin.

In: Sains Malaysiana, Vol. 46, No. 10, 01.10.2017, p. 1987-1995.

Research output: Contribution to journalArticle

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