Carrier Phase Measurement in Ultra - tight Integration Tracking Loops Based on EKF
نویسندگان
چکیده
Abstract—There is a problem that the accuracy and stability of the carrier phase measurements cannot meet the requirement of the short baseline attitude determination, ultra-tight integration tracking loop for the carrier phase measurement is raised. In this paper, the mathematical model for carrier phase measurements is derived. The factors affecting the accuracy and stability of carrier phase measurements are analyzed. The EKF is proposed as the filter of the ultra-tightly integration carrier tracking loop and to obtain the carrier phase measurement. The filter model is designed. These experiment results show that, the EKF-based ultra-tight integration tracking loop can inhibit the noise of the carrier phase tracking, improve the tracking loop stability, and enhance the accuracy and reliability of carrier phase measurement. The carrier phase measurement noises are inhibited about 30%.
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