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《Acta Geodaetica et Cartographica Sinica》 2017-01
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Improvement of Narrow-lane Fractional Cycle Bias Estimation and Analysis of Its Time-varying Property

LI Linyang;CUI Yang;WANG Yupu;L Zhiping;School of Surveying and Mapping,Information Engineering University;  
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 IGGⅢscheme 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.
【Fund】: 国家重点研发计划(2016YFB0501701);; 国家自然科学基金(41674019;41274015)~~
【CateGory Index】: P228.4
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