The analysis of regional GPS network with precise poin positioning

Details The analysis of regional GPS network with precise poin positioning The analysis of regional GPS network with precise poin positioning

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001acasn..42..248h&link_type=abstract

Acta Astronomica Sinica, Vol.42, no.3, p.248-258.

Statistics

Computation

2

Gps, Precise Point Positioning, No-Fiducial

Scientific paper

The scheme PPP of GPS analysis, precise point positioning, determines the position of individual receiver using both the carrier phase and pseudo-range data, with the precise ephemerides and clocks fixed. No parameter common to any two receivers helps to eliminate the correlation, and consequently the computation burden is reduced considerably. We apply the GIPSY, a GPS analysis software developed at the Jet Propulsion Laboratory, USA, to the analysis of the APSG (Asia-Pacific Space Geodynamics Program) GPS campaigns. The repeatability of PPP solutions is at the same level of that obtained with GAMIT, which is popular in China and uses double-difference data. For maintaining the better site configuration, the no-fiducial method is used. After transforming to ITRF96, the errors of PPP are at the same level of that obtained with GAMIT. However, about 3.5 hours is needed to process data of 100 sites with PPP method while it take 18-20 hours to process the same data with double-difference (d-d) method. With the coming deployment of more than 2000 GPS receivers in China, PPP will prove to be the proper scheme in the sense that it saves computation resources and time under the same precision as d-d method.

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