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Dilution of Precision and Clock of Simulated Pseudolites Augmented GPS Signals

To improve insufficiently available satellite and solve the anomaly geometry, normal GPS system and its mentioned drawbacks are simulated. Based on the analysis of anomaly examples, singular value decomposition (SVD) is applied to settle the anomaly and its effect on precision is investigated. Then pseudolites with proper geometry are laid to increase the number of measurements and advance the geometry to compare with the only GPS normal and anomaly system. The results show that added pseudolites not only solve the problem of no or not good navigation and position solution without enough available measurements, but resolve the lower precision and clock bias because of the anomaly geometry to obtain the required dilution of precision and right clock value.