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    題名: Study of higher order ionospheric refraction effects on precise point positioning accuracy
    作者: 林老生
    Hung, Wanchi
    Lin, Laosheng
    貢獻者: 地政系
    關鍵詞: Communication satellites;Errors;Ionosphere;Navigation systems;Refraction;Remote sensing;Surveying;Tracking (position);Deformation monitoring;Dual-frequency data;Duel frequency;Experiment methods;Global Navigation Satellite Systems;Ionospheric refraction;Precise point positioning;Technical universities;Global positioning system
    日期: 2015-10
    上傳時間: 2017-08-14 15:54:31 (UTC+8)
    摘要: The precise point positioning (PPP) accuracy can reach centimeter level using global positioning system (GPS) dual-frequency data. However, centimeter level accuracy is insufficient for high accuracy applications, such as control surveying, deformation monitoring, and etc. To improve the accuracy of PPP, higher order ionospheric refraction effects must be taken into account. The purpose of this research is to investigate the effects on PPP caused by higher order ionospheric refraction errors. The first step is to estimate the higher order ionospheric refraction terms of GPS dual-frequency data. And then, correcting the GPS RINEX file accordingly. At last, evaluating the accuracy of PPP after higher order ionospheric refraction errors are corrected. Two programs are applied in this paper: RINEX-HO and gLAB (global navigation satellite system-LABoratory). RINEX-HO, developed by São Paulo State University in Brazil, can estimate higher order ionospheric refraction terms and produce a corresponding corrected GPS observation file. gLAB, developed by gAGE(Research group of Astronomy and GEomatics Technical University of Catalonia in Spain), can perform precise point positioning and calculate position errors. Experiment data are the GPS observation data, precise ephemeris and other data of international global navigation satellite system service (IGS) station on the day of the spring equinox, summer solstice, autumn equinox and winter solstice in several years. The preliminary results show that the position accuracy of summer solstice observation data in 2011 is improved after the correction of higher order ionospheric refraction errors. The detailed theory, experiment methods and preliminary result will be presented in this paper.
    關聯: ACRS 2015 - 36th Asian Conference on Remote Sensing: Fostering Resilient Growth in Asia, Proceedings
    36th Asian Conference on Remote Sensing: Fostering Resilient Growth in Asia, ACRS 2015; Crowne Plaza Manila GalleriaQuezon City, Metro Manila; Philippines; 24 October 2015 到 28 October 2015; 代碼 118634
    資料類型: conference
    顯示於類別:[地政學系] 會議論文

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