A real-time decimeter-level positioning method based on Beidou tri-frequency signals at long distances
A positioning method and decimeter-level technology, applied in the field of global navigation satellite positioning, can solve the problems of timeliness of positioning, difficulty in meeting application requirements, and low accuracy of ranging codes, and achieve the effect of saving construction and maintenance costs
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[0055] Such as figure 1 As shown, the present invention provides a real-time decimeter-level positioning method based on Beidou tri-frequency signals at a long distance from a single reference station. Based on the principle of minimum noise impact, the optimal combined observations Φ(0,-1,1) and Φ(1,4,-5) for ultra-wide lane ambiguity resolution are constructed, and the single-epoch fixed correspondence is based on the rounding method Ambiguity Then, the initial value of the ionospheric error is estimated according to the fixed integer ambiguity, and the idea of smoothing is introduced to further optimize the ionospheric error through Hatch filtering. It is to make full use of the linear correlation characteristics of the combined wide-lane observations, and based on the condition that the comprehensive influence of the ionospheric error and the combined observation noise of the carrier wave is the minimum, to construct the optimal wide-lane combined observations Φ(-14,10...
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