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Shanghai Jiao Tong University team proposes PASS precision approach simulation system

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A research team at Shanghai Jiao Tong University proposes PASS, a precision approach simulation system for the development of CAT III integrity algorithms for fixed-wing aircraft. Within a unified spatiotemporal geometric framework, it integrates a configurable airport environment, prescribed trajectories, inertial simulation, calibrated stereo images, and continuous runway-relative ground truth, supporting research on navigation and integrity algorithms under controllable sensor errors and environmental variations. The team also proposes SRST (Sim-to-Real Scene Trustworthiness), a sim-to-real scene trustworthiness metric that quantifies how close simulated and real scenes are based on DINOv2 feature distributions and UMAP. The authors state that experiments with representative stereo-inertial estimators verified the usability of the generated sequences and quantified localization errors under different algorithms and environments.