The Research on the Fast Static Precise Point Position Based on Ridged Estimation

Details The Research on the Fast Static Precise Point Position Based on Ridged Estimation The Research on the Fast Static Precise Point Position Based on Ridged Estimation

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009acasn..50..438l&link_type=abstract

Acta Astronomica Sinica, vol. 50, no. 4, p.438-444

Astronomy and Astrophysics

Astronomy

Astrometry, Earth, Techniques: Miscellaneous

Scientific paper

Precise Point Positioning (PPP) has been reported to have a precision at centimeter level in static mode and at centimeter to decimeter level in kinematic mode. However, the application of PPP to real-time is still limited by its long convergence time, typically 30 minutes, which is necessary for the float carrier phase ambiguity resolution. The ambiguity free model of PPP can eliminate the initial phase ambiguities through epoch-difference of phase observations. However, this mode only estimates coordinate differences between two sequential epochs. Therefore, the station coordinates need to be derived with additional methods, e.g., combined with noised range observations. In this paper, based on the phase epoch-difference, a fast static PPP algorithm is developed, where parameters estimation is based on the ridged estimation. The coordinates can be estimated by observations only at two epochs, assuring the fast PPP. Using the 1 hour-data collected on the 295th day of 2007 in Tongji University, a test was carried out. Results show that the coordinate precision can be at centimeter to decimeter level when the initial values are different.

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