Instantaneous Ionospheric Scintillation Mapping over the East African Region by use of GPS Derived Amplitude Scintillation Proxy
Asian Journal of Research and Reviews in Physics,
Ionospheric scintillation activity over the East African region is often monitored using measurements from the SCIntillation Network Decision Aid (SCINDA) receivers. Many of the SCINDA receivers over East Africa are currently not archiving data and therefore a large part of the region remain un sampled. We investigated the possibility to use dual frequency receivers of the Global Navigation Satellite System (GNSS) network for scintillation mapping. A proxy for amplitude scintillation was first derived by scaling the rate of change of total electron content index (ROTI). The proxy was validated against S4 derived from nearly collocated SCINDA receivers over the region. A good correlation was observed between the proxy and S4. The proxy was then used to map the occurrence of amplitude scintillation over East Africa based on semivariogram modeling and Kriging interpolation technique. The results indicate that the S4 values had a good positive correlation with *Corresponding author: E-mail: firstname.lastname@example.org; Amabayo et al.; AJR2P, 4(2): 6-20, 2021; Article no.AJR2P.66815 the simulated S4p from the Kriging interpolation. This observation suggests that data from the dual frequency receivers of GNSS may be used to map scintillation over East Africa. These maps can in turn be used to study the evolution of ionospheric scintillation patterns over the region.
- Amplitude scintillation proxy
- Scintillation maps
How to Cite
Mengyang Z, Baowei L, Wenmiao S. A method for dual frequency ionospheric time delay correcting using a C/A code GPS receiver. Journal of electronics. 1999;16:66–72.
Hofmann-Wellenhof B, Lichtenegge H, Wasle E. Global Navigation Satellite Systems, GPS, GLONASS, Galileo and More. Springer Wien New York; 2008.
Kintner P, Ledvina B M, de Paula ER. GPS and ionospheric scintillation. Space Weather. 2007;5:S09003.
Iyer KN, Souza JR, Pathan BM, Abdu MA, Jivani MN, Joshi HP. A model of equatorial and low latitude VHF scintillation in India. Ind. J. Radio and Space Phys. 2006;35:98-104.
Frernouw EJ, Secan JA. Modeling and scientific application of scintillation result. Radio Sci. 1984;19:687-694.
Rino CL. A power law phase screen model for ionospheric scintillation: 1. weak scatter. Radio Sci. 1979;14:1135-1145.
Priyadarshi S. A review of ionospheric scintillation models. Surv. Geophys. 2015;36:295–324.
Caton RG, McNeil WJ. GPS proxy model for real-time UHF satellite communications scintillation maps from the Scintillation Network Decision Aid (SCINDA). Radio Sci. 2004;39:RS1S22.
Pi X, Mannucci AJ, Lindqwister UJ, Ho CM. Monitoring of global ionospheric irregularities using the worldwide GPS network. Geophys. Res. Lett. 1997;24:2283-2286.
Basu S, Groves KM, Quinn JM, Doherty P. A comparison of TEC fluctuations and scintillations at Ascension Island. J. Atmos. Sol.-Terr. Phys. 1999;61:1219-1226.
Du J, Wilkinson P, Thomas R, Cerver M. Determination of equatorial ionospheric scintillation S4 dual frequency GPS. URSI Commission G, Workshop, La Trobe University, Australia; 2000.
Prikryl P, Ghoddousi-Fard R, Kunduri BSR, Thomas EG, Coster AJ, Jayachandran PT, Spanswick E, Danskin DW. GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm. Ann. Geophys. 2013;31:805–816.
Amabayo EB, Jurua E, Cilliers PJ. Validating the use of scintillation proxies to study ionospheric scintillation over the Ugandan region. J. Atmos. Sol.-Terr. Phys. 2015;128: 84-91.
Andima G, Amabayo EB, Jurua E, Cilliers PJ. GPS derived amplitude scintillation proxy model: A case over a low latitude station in east africa. J. Atmos. Sol.-Terr. Phys. 2020;211. Available:https://doi.org/10.1016/j.jastp.2020.105461
Seemala GK, Valladares C. Statistics of total electron content depletions observed over the south american continent for the year 2008. Radio Sci. 2011;46:RS5019.
Carrano CS, Groves KM, Rino CL. On the relationship between the rate of change of total electron content index (ROTI), irregularity strength (CkL), and the scintillation index (S4). J. Geophys. Res.: Space Phys. 2019;124:2099-2112.
Krige D G. A statistical approach to some basic mine valuation problems on the witwatersrand. Journal of the Chemical and Metallurgical Society of South Africa. 1951;52:119-139.
Oliver MA, Webster R. Basic Steps in Geostatistics: The Variogram and Kriging. Springer Science and Business Media; 2015.
Huang L, Zhang H, Xu P, Geng J, Wang C, Liu J. Kriging with unknown variance components for regional ionospheric reconstruction. Sensors. 2017;17(3):468.
Amabayo et al.; AJR2P, 4(2): 6-20, 2021; Article no.AJR2P.66815
Abe O, Rabiu A, Bolaji O, Oyeyemi E. Modeling African equatorial ionosphere using ordinary kriging interpolation technique for gnss applications. Astrophys Space Sci. 2018;363(168). Available:https://doi.org/10.1007/s10509-018-3387-x
Hamel P, Sambou DC, Darces M, Beniguel Y, Helier M. Kriging method to perform scintillation maps based on measurement and gism model. Radio Sci. 2014;49:746-752.
Harsha PBS, Ratnam DV, Nagasri ML, Sridhar M, Raju KP. Kriging-based ionospheric tec, roti and amplitude scintillation index (s4) maps for india. IET Radar Sonar Navig. 2020;14:1827- 1836.
Geng W. Huang W, Liu G, Aa E, Liu S, Chen Y, Luo B. Generation of ionospheric scintillation maps over southern china based on kriging method. Adv. Space Res. 2020;65:2808-2820.
Kintner PM, Ledvina BM, de Paula ER, Kantor IJ. Size, shape, orientation, speed, and duration of gps equatorial anomaly scintillations. Radio Sci. 2004;39:RS2012.
Rishbeth H. Thermospheric winds and the f-region: A review. J. Atmos. Terr. Phys. 1972;34:1- 47.
Heelis R. Electrodynamics in the low and middle latitude ionosphere:a tutorial: J. Atmos. Sol.- Terr. Phys. 2004;66:825-838.
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