Currently, solar activity is in its 25th peak year, with frequent occurrences of ionospheric scintillation, resulting in a significant increase in cycle slip events in Global Navigation Satellite System (GNSS) observation data and significantly affecting the reliability of precise positioning services. Accurate cycle s...
Dong-Sheng Zhao, Ai-Jia Zhang, Shuang-Lei Cui et al.· GPS Solutions· 0 citations
The advent of the peak year of the 25th solar cycle has led to a notable intensification of ionospheric disturbances, resulting in frequent occurrences of ionospheric scintillation. Ionospheric scintillation has emerged as a critical factor compromising the stability of global navigation satellite system (GNSS) positio...
Dong-Sheng Zhao, Huai-Ke Liu, Ke-Fei Zhang et al.· IEEE Transactions on Geoscie...· 0 citations
Experimental results demonstrated that decomposing PWV into linear and nonlinear components via wavelet transform can enhance prediction accuracy and among all the schemes tested, ARIMA-KOA-CNN-GRU-Attention performed the best, achieving a 52% RMSE reduction in comparison with the ARIMA-KOA-GRU method.
Xiangrong Yan, Wei-Fang Yang, Ke-Fei Zhang et al.· IEEE Journal of Selected Top...· 0 citations
This analysis provides an initial indication that DeepTomo, by producing physically consistent GNSS-constrained moisture analyses from ERA5 background fields, has the potential to improve initial conditions and forecast performance in next-generation AI weather forecasting systems, such as GraphCast, bridging GNSS obse...
Saeid Haji-Aghajany, Benedikt Soja, Ke-Fei Zhang et al.· IEEE Transactions on Geoscie...· 1 citation
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