Improvement of Narrow-lane Fractional Cycle Bias Estimation and Analysis of Its Time-varying Property

doi:10.11947/j.AGCS.2017.20160222

Abstract

Abstract: The length of narrow-lane FCB is short, and it's seriously influenced by the quality of observation data and inaccurate models, narrow-lane FCB estimates of different reference station are significantly biased, thus the stability is relatively poor. Aiming at those biased narrow-lane FCB estimates, narrow-lane FCB robust estimation method based on robust initial value is proposed, the median of narrow-lane FCB estimates of all reference stations at current epoch is utilized as the robust initial value, and IGGⅢ scheme is applied to decrease the contribution of biased narrow-lane FCB estimates. Data from IGS global tracking stations are used in the experiment, the accuracy and stability of narrow-lane FCB are improved, the need of narrow-lane ambiguity fixing can be satisfied based on a group of daily estimated satellite narrow-lane FCB. Meanwhile, the success rate of narrow-lane ambiguity fixing and imitated dynamic positioning accuracy are improved.

Key words: narrow-lane ambiguity, fractional cycle bias, median, robust estimation, time-varying property

CLC Number:

P228

LI Linyang, CUI Yang, WANG Yupu, LÜ Zhiping. Improvement of Narrow-lane Fractional Cycle Bias Estimation and Analysis of Its Time-varying Property[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(1): 34-43.

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