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Precise Positioning from GPS Carrier Phase Measurement Applying Stochastic Models for Ionospheric Delay  

Yang, Hyo-Jin (서울시립대학교 대학원 공간정보공학과)
Kwon, Jay-Hyoun (서울시립대학교 도시과학대학 공간정보공학과)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.25, no.4, 2007 , pp. 319-325 More about this Journal
Abstract
In case of more than 50km baseline length, the correlation between receivers is reduced. Therefore, there are still some rooms for improvement of its positional accuracy. In this paper, the stochastic modeling of the ionospheric delay is applied and its effects are analyzed. The data processing has been performed by constructing a Kalman filter with states of positions, ambiguities, and the ionospheric delays in the double differenced mode. Considering the medium or long baseline length, both double differenced GPS phase and code observations are used as observables and LAMBDA has been applied to fix the ambiguities. The ionospheric delay is stochastically modeled by well-known 1st order Gauss-Markov process. And the correlation time and variation of 1st order Gauss-Markov process are calculated. This paper gives analyzed results of developed algorithm compared with commercial software and Bernese.
Keywords
GPS; medium baseline; Ionospheric effect; stochastic model; LAMBDA;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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