Time Syntonization and Frequency Stabilizing Using GPS Carrier Phase with Extension Controller

This study discusses time syntonization and frequency stability calibration using GPS carrier phase measurements. Thus far most papers on this subject discussed using two GPS receiver measurements, and performing frequency stabilizing and vehicle positioning with the double differences. This paper proposes using a dual frequency GPS receiver and a novel extension controller neural network algorithm that can achieve the frequency stabilizing and coordinate positioning. The oscillation frequency of the rubidium atom clock is selected first as the satellite atom clock oscillation frequency as the criterion for adjusting the GPS receiver oscillator's frequency. The receiver’s oscillation frequency is synchronized with the reference atomic clock oscillation frequency using the designed extension controller and extension neural network. To finish the frequency stabilizing and time syntonization, the time can be calibrated and the position precision on the vehicle improved. The position precision can be improved from about 3.5 meters to about 1.5 meters using the extension controller. The time error is improved from about 7 4.85 10 × seconds to about 8 2 .8 5 1 0 − × seconds. Using the extension neural network to verify the position precision allows improvement from about 3.5 meters to about 1.3 meters. The time error is improved from about 7 4.85 10 × seconds to about 8 2 .8 1 0 − × seconds. The system was verified experimentally as satisfying the exactness, feasibility and robustness of the initial concept. Key-Words: GPS, Carrier Phase, Extension Controller, Extension Neural Network