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http://dx.doi.org/10.12652/Ksce.2013.33.6.2601

Accuracy Analysis of Absolute Positioning by GNSS  

Lee, Yong Chang (Incheon National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.33, no.6, 2013 , pp. 2601-2610 More about this Journal
Abstract
The main limiting factors of Precise Point Positioning(PPP) accuracy are errors in broadcast satellite orbits, clock errors, and the others, which are receiver-dependent errors(ionospheric, tropospheric refraction, multipath, and tides, etc.). Therefore, to facilitate high precision PPP, precise orbits/clocks corrections, the receiver-dependent errors corrections have to apply to multi frequency GNSS measurements for an ionosphere free combination and integer ambiguity resolution in real-time. Currently, there are many Analysis Centers, which offer the precise corrections stream computed in real-time using the global or regional GNSS tracking network. The goles of this research considered performances of the real-time static PPP with using RTCM corrections from NTRIP casters. For this, the corrections streams of Analysis Centers received via NTRIP does apply to GNSS data of check points individually, as well as jointly, in accordance with various session lengths. After that, have compared the PPP results from the corrections streams with each other, and with Standard Point Positioning(SPP) results.
Keywords
PPP; Integer ambiguity; The precise corrections streams; RTCM; NTRIP;
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