Positioning performance of GNSS-PPP and PPP-AR methods for determining the vertical displacements

Abstract

This study investigates the accuracy of vertical displacements monitored by Global Navigation Satellite Systems (GNSS) precise point positioning (PPP) with float-ambiguity solution and with ambiguity resolution (PPP-AR). For this purpose, a simulation was designed. The static GNSS observations were collected at a test point during different observation times over seven periods involving vertical displacements produced with a precision of less than one mm. Each set of GNSS observations was processed with both GNSS-PPP and PPP-AR methods. The results revealed that RMS values of PPP-AR solutions are about twice better than RMS values of PPP solution for all observation times and all vertical displacement values.

Keywords:

• GNNS
• PPP
• PPP-AR
• Vertical displacements

Additional information

Notes on contributors

Burak Akpınar

Burak Akpınar received the bachelor's, the master's, and the Ph.D. degree in Geomatics Engineering from Yildiz Technical University in 2000, 2003, and 2009, respectively. He worked as a research assistant from 2002 to 2014, as an assistant professor from 2014 to 2016 in the Department of Geomatics Engineering, Yildiz Technical University, Istanbul. Since 2016, he has been serving as a an associate professor in the same department.