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

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.

Inspec keywords: ionospheric electromagnetic wave propagation; solar flares; Global Positioning System; radio receivers; Hilbert transforms; radiowave propagation; total electron content (atmosphere); wavelet transforms; satellite navigation

Other keywords: RTISM model; real-time ionospheric scintillation monitoring model; distended Sun's illumination; solar radiations; Surat; Indian regional navigation satellite system; natural event; navigation system; Indian Space Research Organisation; ionospheric TEC; IRNSS receiver; solar flare events; IRNSS signals; analysing impact; 22 July 2016; India; ionosphere; 23 July 2016; 24 July 2016; SVNIT

Subjects: Instrumentation and techniques for geophysical, hydrospheric and lower atmosphere research; Other topics in statistics; Radionavigation and direction finding; Ionospheric structure; Satellite communication systems; Radiowave propagation; Probability theory, stochastic processes, and statistics; Solar flares, bursts, and related phenomena; Ionospheric electromagnetic wave propagation

References

    1. 1)
      • 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.
    2. 2)
      • 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.
    3. 3)
      • 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.
    4. 4)
      • 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.
    5. 5)
      • 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.
    6. 6)
      • 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.
    7. 7)
      • 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.
    8. 8)
      • 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.
    9. 9)
      • 22. Mohguen, W., hadiBekka, R., 2017 J. Phys.: Conf. Ser. 787 012014.
    10. 10)
      • 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.
    11. 11)
      • 4. Xiaoqing, P., Iijima, B., Wenwen, L.: ‘Effects of ionospheric scintillation on GNSS-based positioning’, Navig., J. Inst. Navig., 2017, 64, pp. 322.
    12. 12)
      • 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.
    13. 13)
      • 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.
    14. 14)
      • 15. Aaron, J., Basu, S.: ‘Ionospheric amplitude & phase fluctuations at the GPS frequencies’. ION94, Sat. Div., Salt Lake City, Utah, 1994, pp. 15691578.
    15. 15)
      • 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.
    16. 16)
      • 2. Kintner, P.M., Ledvina, B.M., de Paula, E.R.: ‘GPS and ionospheric scintillations’, Space. Weather., 2007, 5, pp. 123.
    17. 17)
      • 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.
    18. 18)
      • 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.
    19. 19)
      • 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.
    20. 20)
      • 7. Misra, P., Enge, P.: ‘Global positioning system, signals, measurements, and performance’ (Ganga Jamuna Press, Lincoln, Massachusetts, 2001).
    21. 21)
      • 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.
    22. 22)
      • 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.
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