Author

Long-Jiang Li

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Open access 2026

RODTI: A Method for Extracting Ionospheric Scintillation-Related Index Based on DORIS Dual-Frequency Observations and Its Verification on a Global Scale

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

Open access Oct 2026

Robust Real-Time Orbit Determination After GNSS Outages via Uncertainty-Aware Predicted-Orbit Constraints

Accurate and continuous onboard real-time orbit determination (RTOD) is essential for Low Earth Orbit (LEO) satellites, but temporary interruptions of onboard Global Navigation Satellite Systems (GNSS) observations can degrade orbit continuity and delay filter re-convergence. Although predicted-orbit constraints can ac...

Ding-Yi Liu, Chun-Tao Chang, Long-Jiang Li et al. · Electronics · 0 citations

Open access 2026

ARIMA-KOA-CNN-GRU-Attention Model for Improving GNSS Water Vapor Prediction

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