| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 87 === In order to improve the positioning precision, the carrier-phase observable with less noise are applied during the data process of relative satellite positioning. However, the phase ambiguity in carrier-phase observable needs to be calculated , rather than in pseudorange observable, the integral phase ambiguity can be eliminated through the single-difference carrier-phase cosine model without the problem of cycle slips and compensation.
Compared with the plane components, the high components resulted from GPS is two to three times in difference. The factor that influences the precision in the high components is mainly the tropospheric zenith path delays are used to describe the tropospheric effects by way of empirical formula. The purpose of this paper is aimed at reducing the correlation between the station heights and clock offsets. In collaboration with analysis on the theories of time series, the Gauss-Markov process model is employed to predict the time-varying clock offsets. Also, the sequential least-squares adjustment is used to sequentially solve the single-difference carrier-phase cosine and Gauss-Markov models. In so doing, we could reduce the high correlation between the high components and the clock offsets, and the position precision in the high components is thus improved.
|
|---|
