Comparison of the Radio Frequency Interference (RFI) in the Region of Solar Burst Type III Data at Selected CALLISTO Network

Hamidi, Zety Sharizat; Shariff, N.N.M.; Monstein, C.

doi:10.18052/www.scipress.com/ILCPA.29.38

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Comparison of the Radio Frequency Interference (RFI) in the Region of Solar Burst Type III Data at Selected CALLISTO Network

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Abstract:

Compact Astronomical Low-frequency, Low-cost Instrument for Spectroscopy in Transportable Observatories (CALLISTO) is a global network of spectrometer system with the purpose to observe the Sun’s activities. There are 25 stations that are used for this purpose. Radio Frequency Interference (RFI) is a major obstacle when performing observation with CALLISTO. We have confirmed at least 2 stations out of 10 stations with a complete overview spectral (OVS) made available to us showed clear detection of these consistent types of RFI for each specific region. In Malaysia, these RFI are also clearly detected. The major RFI affecting CALLISTO within radio astronomical windows below 1 GHz are local electronic system specifically radio navigation (at 73.1 MHz and 75.2 MHz), broadcasting (at (i) 151 MHz, (ii) 151.8 MHz and 152 MHz), aeronautical navigation (at (i) 245.5 MHz, (ii) 248.7 MHz and (iii) 249 MHz and fixed mobile at (i) 605 MHz, (ii) 608.3 MHz, (iii) 612.2 MHz, (iv) 613.3 MHz). It is obviously showed that all sites within this region are free from interference at 320-330 MHz and is the best specific region to be considered for solar burst monitoring. We also investigate the effect of RFI on detection of solar burst. We have considered type III solar bursts on 9th March 2012 in order to measure the percentage of RFI level during the solar burst. The RFI level is as low as 6.512% to 80.769% above solar burst detection.

Info:

Periodical:

International Letters of Chemistry, Physics and Astronomy (Volume 29)

Pages:

38-45

DOI:

https://doi.org/10.18052/www.scipress.com/ILCPA.29.38

Citation:

Z. S. Hamidi et al., "Comparison of the Radio Frequency Interference (RFI) in the Region of Solar Burst Type III Data at Selected CALLISTO Network", International Letters of Chemistry, Physics and Astronomy, Vol. 29, pp. 38-45, 2014

Online since:

March 2014

Authors:

Zety Sharizat Hamidi, N.N.M. Shariff, C. Monstein

Keywords:

CALLISTO, Low Frequency, Radio Frequency Interference (RFI), Solar Burst, Type III

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Creative Commons Attribution 4.0 International License

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