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A correlation study of solar activity index and amplitude of VLF trans-equatorial propagation

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Abstract

Diurnal and seasonal behavior of amplitude of NWC 22.3 kHz signal transmitted from Australia (22049/S, 114023/E), and received at Kolkata (22034/N, 88024/E), India have been investigated The signal amplitude is remarkably low in October. The variations of daily maximum and daily minimum of signal amplitude have been analyzed. The signal on the present propagation path showed non-correlation with A p index, but showed a moderate but negative correlation with 10.7 cm solar flux.

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Authors and Affiliations

  1. Department of Physics, M B B College, Agartala, Tripura, 799 004, India

    P. Pal

  2. Department of Physics, Tripura University, Suryamaninagar, 799 130, Tripura, India

    A. Bhowmik, R. Roy, R. Ali, A. Choudhury, A. Guha & B. K. De

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  1. P. Pal
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  2. A. Bhowmik
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  3. R. Roy
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  4. R. Ali
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  5. A. Choudhury
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  6. A. Guha
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  7. B. K. De
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Correspondence to P. Pal.

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Pal, P., Bhowmik, A., Roy, R. et al. A correlation study of solar activity index and amplitude of VLF trans-equatorial propagation. Indian J Phys 84, 641–645 (2010). https://doi.org/10.1007/s12648-010-0064-5

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  • DOI: https://doi.org/10.1007/s12648-010-0064-5

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