Instantaneous Ionospheric Scintillation Mapping over the East African Region by use of GPS Derived Amplitude Scintillation Proxy
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Asian Journal of Research and Reviews in Physics
Abstract
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 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.
Description
Keywords
Amplitude scintillation proxy, Scintillation maps, Kriging
Citation
Ssenyunzi, R. C., Andima, G., & Amabayo, E. B. (2021). 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, 4(2), 6-20. DOI: 10.9734/AJR2P/2021/v4i230138