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Sponsored AI AM CLAUDE, A Beginner's Guide: Learn the basics of working with AI AI AM CLAUDE, A Beginner's Guide: Learn the basics of working with AI

Author

Zhi-Bo Fang

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2 papers indexed here

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Open access Sep 2026

Structured Innovation-Based Covariance Calibration for TLE-Driven dSGP4–EKF Orbit Determination

Reliable orbit estimation from position observations depends on both nominal propagation and the specification of process and measurement uncertainty. An offline covariance calibration framework is presented for a TLE-driven differentiable SGP4 extended Kalman filter (dSGP4–EKF). dSGP4 supplies the fixed nominal trajec...

Jia-Yu Zhang, Yi-Fan Li, Jian-Kun Peng et al. · 0 citations
Open access Sep 2026

Adaptive Weighting-Based Multi-Station Doppler Orbit Determination for Noncooperative LEO Satellites

Precise orbit information is generally unavailable to users of noncooperative low Earth orbit (LEO) communication satellites such as Iridium NEXT, making publicly available two-line element (TLE) data the primary source of orbital states. However, TLE-derived orbital-state errors degrade Doppler positioning performance...

Ming Lei, Yue Liu, Zhi-Hao Yang et al. · 0 citations

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