지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Precise Point Positioning (PPP) is an increasingly recognized precisely the GPS/GNSS positioning technique. In order to improve the accuracy of PPP, the error sources in PPP measurements should be reduced as much as possible and the ambiguities should be correctly resolved. The correct ambiguity resolution requires a careful control of residual errors that are normally categorized into random and systematic errors. To understand effects from two categorized errors on the PPP ambiguity resolution, those two GPS datasets are simulated by generating in locations in South Korea (denoted as SUWN) and Hong Kong (PolyU). Both simulation cases are studied for each dataset; the first case is that all the satellites are affected by systematic and random errors, and the second case is that only a few satellites are affected. In the first case with random errors only, when the magnitude of random errors is increased, L1 ambiguities have a much higher chance to be incorrectly fixed. However, the size of ambiguity error is not exactly proportional to the magnitude of random error. Satellite geometry has more impacts on the L1 ambiguity resolution than the magnitude of random errors. In the first case when all the satellites have both random and systematic errors, the accuracy of fixed ambiguities is considerably affected by the systematic error. A pseudorange systematic error of 5 cm is the much more detrimental to ambiguity resolutions than carrier phase systematic error of 2 mm. In the 2nd case when only a portion of satellites have systematic and random errors, the L1 ambiguity resolution in PPP can be still corrected. The number of allowable satellites varies from stations to stations, depending on the geometry of satellites.
Through extensive simulation tests under different schemes, this paper sheds light on how the PPP ambiguity resolution (more precisely L1 ambiguity resolution) is affected by the characteristics of the residual errors in PPP observations. The numerical examples recall the PPP data analysts that how accurate the error correction models must achieve in order to get all the ambiguities resolved correctly.
Through extensive simulation tests under different schemes, this paper sheds light on how the PPP ambiguity resolution (more precisely L1 ambiguity resolution) is affected by the characteristics of the residual errors in PPP observations. The numerical examples recall the PPP data analysts that how accurate the error correction models must achieve in order to get all the ambiguities resolved correctly.
목차
Abstract
1. Introduction
2. GPS Data Simulation and Random and Systematic Error Generation
3. PPP Model and Ambiguity Fixing
4. Numerical Result and Analysis
5. Conclusions
References
참고문헌 (19)
참고문헌 신청
1. [학위논문] - Abdel-salam, M. / 2005 / Precise Point Positioning Using Un-differenced Code and Carrier Phase Observations / 박사 / University of Calgary
2. [학술지(정기간행물)] - Bertiger, W. / 2010 / Single receiver phase ambiguity resolution with GPS data / Journal of Geodesy 84 (5) : 327 ~ 337
3. [학술지(정기간행물)] - Bisnath, S. B. / 2009 / Current state of precise point positioning and future prospects and limitations / Observing our Changing Earth 133 : 615 ~ 623
4. [단행본] - Brown, R. G / 1997 / Introduction to random signals and applied Kalman filtering / Wiley
5. [학술대회논문] - Collins, P. / 2008 / Isolating and estimating undifferenced GPS integer ambiguities / Proceedings of the 2008National Technical Meeting of The Institute of Navigation : 720 ~ 732
2. [학술지(정기간행물)] - Bertiger, W. / 2010 / Single receiver phase ambiguity resolution with GPS data / Journal of Geodesy 84 (5) : 327 ~ 337
3. [학술지(정기간행물)] - Bisnath, S. B. / 2009 / Current state of precise point positioning and future prospects and limitations / Observing our Changing Earth 133 : 615 ~ 623
4. [단행본] - Brown, R. G / 1997 / Introduction to random signals and applied Kalman filtering / Wiley
5. [학술대회논문] - Collins, P. / 2008 / Isolating and estimating undifferenced GPS integer ambiguities / Proceedings of the 2008National Technical Meeting of The Institute of Navigation : 720 ~ 732
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UCI(KEPA) : I410-ECN-0101-2015-530-002847043