Analysing impact of major solar flares on ionospheric TEC with RTISM model using IRNSS receiver, at SVNIT, Surat, India

Analysing impact of major solar flares on ionospheric TEC with RTISM model using IRNSS receiver, at SVNIT, Surat, India

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Indian regional navigation satellite system (IRNSS) is a navigation system developed by the Indian Space Research Organisation (ISRO), India. The IRNSS receiver granted by Space Application Centre (SAC), ISRO, Ahmedabad is installed at SVNIT, Surat, India. A solar flare is a natural event that occurs when an unpredicted flash of distended Sun's illumination is observed near its surface. The ionosphere is greatly ionised by solar radiations. Hence it is a current challenge to investigate effects of ionospheric scintillation on IRNSS signals. This study examines impact of major solar flare events like Class ‘C’ solar flare happened on 22 July 2016 and class ‘M’ solar flare occurred on 23 and 24 July 2016, on IRNSS signals with measurement of total electron content (TEC). Real-time ionospheric scintillation monitoring (RTISM) model based on empirical mode decomposition (EMD) and second-order Daubechies (db2) wavelet is used for comparing measured and denoised TEC. The RTISM model is also used for determining automatic threshold using Neyman–Pearson detector, probability of detection and probability of false alarm. It is proven with analysis that EMD is giving more sharp results as compared to db2 wavelet for determining fluctuations in TEC during the solar flare events.


    1. 1)
      • 1. Thombre, S., Bhuiyan, M.Z.H., Soderholm, S., et al: ‘A software multi-GNSS receiver implementation for the Indian regional navigation satellite system’, IETE J. Res., 2016, 62, (2), pp. 246256.
    2. 2)
      • 2. Kintner, P.M., Ledvina, B.M., de Paula, E.R.: ‘GPS and ionospheric scintillations’, Space. Weather., 2007, 5, pp. 123.
    3. 3)
      • 3. Bhattacharya, S., Purohit, P.K., Tiwari, R., et al: ‘Study of GPS based ionospheric scintillation and its effects on dual frequency receiver’, J. Eng., Sci. Manag. Educ., 2010, 1, pp. 5561.
    4. 4)
      • 4. Xiaoqing, P., Iijima, B., Wenwen, L.: ‘Effects of ionospheric scintillation on GNSS-based positioning’, Navig., J. Inst. Navig., 2017, 64, pp. 322.
    5. 5)
      • 5. Lee, J., Morton, Y.T.J., Lee, J., et al: ‘Monitoring and mitigation of ionospheric anomalies for GNSS-based safety critical systems: a review of up-to-date signal processing techniques’, IEEE Signal Process. Mag., 2017, 34, (5), pp. 96110.
    6. 6)
      • 6. Park, B., Lim, C., Yun, Y., et al: ‘Optimal divergence-free hatch filter for GNSS single-frequency measurement’, Sensors (Basel), 2017, 17, (3), p. 448.
    7. 7)
      • 7. Misra, P., Enge, P.: ‘Global positioning system, signals, measurements, and performance’ (Ganga Jamuna Press, Lincoln, Massachusetts, 2001).
    8. 8)
      • 8. Tanna, H.J., Karia, S.P., Pathak, K.N.: ‘A study of L band scintillations during the initial phase of rising solar activity at an Indian low latitude station’, Adv. Space Res., 2013, 52, pp. 412421.
    9. 9)
      • 9. Bagiya, M., Joshi, H.P., Iyer, K.N., et al: ‘TEC variations during low solar activity period (2005–2007) near the equatorial ionospheric anomaly crest region in India’, Ann. Geophys., 2009, 27, pp. 10471057.
    10. 10)
      • 10. Hazarika, R., Kalita, B.R., Bhuyan, K.P.: ‘Ionospheric response to X-class solar flares in the ascending half of the subdued solar cycle 24’, J. Earth Syst. Sci., 2016, 25, (6), pp. 12351244.
    11. 11)
      • 11. Kumar, S., Singh, A.K.: ‘Effect of solar flares on ionospheric TEC at Varanasi, near EIA crest during solar minimum period’, Indian J. Radio Space Phys., 2012, 41, pp. 141147.
    12. 12)
      • 12. Kumar, S., Singh, A.K.: ‘Storm time response of GPS-derived total electron content (TEC) during low solar active period at Indian low latitude station Varanasi’, Astrophys. Space Sci., 2011, 331, (2), pp. 447458.
    13. 13)
      • 13. Zhang, D.H., Mo, X.H., Cai, L., et al: ‘Impact factor for the ionospheric total electron content response to solar flare irradiation’, J. Geophys. Res., 2011, 116, p. A04311.
    14. 14)
      • 14. Guyer, S., Can, Z.: ‘Solar flare effects on the ionosphere’. 2013 6th Int. Conf. on Recent Advances in Space Technologies (RAST), Istanbul, 2013, pp. 729733.
    15. 15)
      • 15. Aaron, J., Basu, S.: ‘Ionospheric amplitude & phase fluctuations at the GPS frequencies’. ION94, Sat. Div., Salt Lake City, Utah, 1994, pp. 15691578.
    16. 16)
      • 16. Ahmed, A., Tiwari, R., Strangeways, H.J., et al: ‘Wavelet-based analogous phase scintillation index for high latitudes’, Space. Weather., 2015, 13, pp. 119.
    17. 17)
      • 17. Ratnam, D.V., Sivavaraprasad, G., Lee, J.: ‘Automatic ionospheric scintillation detector for global navigation satellite system receivers’, IET Radar Sonar Navig., 2015, 9, (6), pp. 702711.
    18. 18)
      • 18. Huang, N.E., Shen, Z., Long, S.R., et al: ‘The empirical mode decomposition and the Hilbert spectrum for nonlinear and nonstationary time series analysis’, Proc. R. Soc. London, Ser. A, 1998, 454, pp. 903993.
    19. 19)
      • 19. Huang Norden, E., Wu, Z.: ‘A review on Hilbert-Huang transform: method and its applications to geophysical studies’, Rev. Geophys., 2008, 46, (2), pp. 19449208.
    20. 20)
      • 20. Qin, Z., Chen, H., Chang, J.: ‘Signal-to-noise ratio enhancement based on empirical mode decomposition in phase sensitive optical time domain reflectometry systems’, Sensors, 2017, 17, pp. 110.
    21. 21)
      • 21. Ayenu-Prah, A., Attoh-Okine, N.: ‘A criterion for selecting relevant intrinsic mode functions in empirical mode decomposition’, Adv. Adapt. Data Anal., Theory Appl., 2010, 2, (1), pp. 124.
    22. 22)
      • 22. Mohguen, W., hadiBekka, R., 2017 J. Phys.: Conf. Ser. 787 012014.

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