Study of Physical and Dynamical Processes in the Ionosphere at Equatorial Anomaly Crest Region during Magnetic Storm for High and Low Solar Activity Period

Chetia, Bornali; Barman, M.K.; Devi, M.; Barbara, A. K.

doi:10.1007/978-3-319-18663-4_133

Cited by 1 publication

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“…Owing to the large spatial scale of the ionosphere and the many factors affecting its internal changes, various complex physical and chemical processes occur in the ionosphere [5,6]. At the middle and low latitudes, the presence of equatorial ionization anomaly region greatly impacts the local physical electrodynamics, making it so difficult to accurately develop a model for the region [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for High-Precision Ionospheric VTEC Estimation and Prediction at the Equatorial Ionization Anomaly Region: A Case Study over Haikou Station

Wang

Zhu²,

Sheng³

et al. 2023

Remote Sensing

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This paper introduces a novel technique that uses observation data from GNSS to estimate the ionospheric vertical total electron content (VTEC) using the Kriging–Kalman method. The technique provides a method to validate the accuracy of the Ionospheric VTEC analysis within the Equatorial Ionization anomaly region. The technique developed uses GNSS VTEC alongside solar parameters, such as solar radio flux (F10.7 cm), Disturbance Storm Time (Dst) and other data, and Long Short Term Memory (LSTM) Networks to predict the occurrence time of the ionospheric equatorial anomaly and ionospheric VTEC changes. The LSTM method was applied to GNSS data from Haikou Station. A comparison of this technique with the neural network (NN) model and International Reference Ionosphere model shows that the LSTM outperforms all of them at VTEC estimation and prediction. The results, which are based on the root mean square error (RMSE) between GNSS VTEC and GIM VTEC outside the equatorial anomaly region, was 1.42 TECU, and the results of GNSS VTEC and VTEC from Beidou geostationary orbit satellite, which lies inside the equatorial ionization anomaly region, was 1.92 TECU. The method developed can be used in VTEC prediction and estimation in real time space operations.

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