The effect of elevation-based stochastic modeling on PPP convergence period

Galala, Muhammad Abou; Kaloop, Mosbeh R.; Rabah, Mostafa; Zidan, Zaki M.

doi:10.21608/iccae.2016.43466

The effect of elevation-based stochastic modeling on PPP convergence period

Document Type : Original Article

Authors

¹ Department of public works Enginering, Faculty of Engineering, Mansoura University, Egypt.

² The National Research Institute of Astronomy and Geophysics (NRIAG), Egypt.

10.21608/iccae.2016.43466

Abstract

Abstract
The major limitation of precise point positioning (PPP) is that it requires a long convergence time about 30 min for that the solution reaches the steady state. Pseudorange multipath and noise have a large impact that weakens the performance of the PPP solution to converge rapidly. By mitigating this impact, improved PPP performance in the convergence will be obtained. The stochastic modelling based on the elevation angle of the satellite is used to mitigate the multipath and noise in pseudorange observations. A set of 522 daily observation files from 75 IGS stations within one week is used. An improvement in the rate of the convergence for 23.4% of the data is achieved by the elevation weighting scheme against the standard PPP solution with equal weights.

Keywords