Inspec keywords: distance measurement; satellite navigation; state estimation; nonlinear filters; probability; velocity measurement; sensor fusion; Kalman filters; reliability

Other keywords: sensor-specific distributed extended Kalman filters; continuous spot train distance measurements; train distance estimation; noise characteristics; speed measurements; high-speed train system; tunnel; wheel sensor; speed sensing; Global Navigation Satellite System; multisensor data fusion; probabilistic weighted fusion algorithm; reliability; GNSS; state estimation; speed estimation algorithm

Subjects: Reliability; Spatial variables measurement; Velocity, acceleration and rotation measurement; Velocity, acceleration and rotation measurement; Spatial variables measurement; Other topics in statistics; Probability theory, stochastic processes, and statistics; Radionavigation and direction finding