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Forecasting 3-dimensional ionospheric disturbances during Hurricane Matthew using ConvLSTM neural network

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Abstract

The uneven distribution of GNSS observations and the scarcity of satellite data pose challenges for the continuous detection of traveling ionospheric disturbances (TIDs) induced by gravity waves (GWs). This paper proposes a short-term TID forecasting method based on the convolutional long short-term memory (ConvLSTM) neural network. This method utilizes 3-D electron density disturbance information from 3-dimensional computerized ionospheric tomography (3DCIT) results to predict the 3-D characteristics of ionospheric disturbances during Hurricane Matthew. A multi-channel forecasting pattern combining disturbance feature labels is used to improve the forecast accuracy. The results show that the ConvLSTM network can effectively identify the spatiotemporal features of TIDs. The inclusion of the labels greatly enhances the forecast performance, as shown by the reduction of the mean absolute error (MAE) and root mean square error (RMSE) over longer forecast durations, along with the increase in correlation. Additionally, the horizontal phase velocities of the TIDs at 200 and 300 km altitudes calculated using the 5-minute forecast results (∼150-173.33 m/s) are comparable to the original 3DCIT estimation (∼166.67-170 m/s).

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (42104009), China Postdoctoral Science Foundation (2022M720988), Fundamental Research Funds for the Central Universities (B230201012). The authors gratefully acknowledge the CEDAR Madrigal open database for GNSS line-of-sights and the National Hurricane Center (NHC) for track data of Hurricane Matthew. The GNSS line-of-sight TEC can be accessed from CEDAR Madrigal Database via http://cedar.openmadrigal.org, and the track of Hurricane Matthew is available from National Hurricane Center (NHC) at https://www.nhc.noaa.gov.

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Y.C. and D.Y. contributed to the conception of the study. Y.C. and C.Z. programmed and verified the model. Y.C. and D.Y. contributed significantly to the data analysis and manuscript preparation. All authors reviewed the manuscript.

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Correspondence to Dongjie Yue.

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The authors declare no competing interests.

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Chen, Y., Yue, D. & Zhai, C. Forecasting 3-dimensional ionospheric disturbances during Hurricane Matthew using ConvLSTM neural network. Astrophys Space Sci 368, 99 (2023). https://doi.org/10.1007/s10509-023-04258-3

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  • DOI: https://doi.org/10.1007/s10509-023-04258-3

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