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


Akpınar B.

SURVEY REVIEW, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1080/00396265.2021.2010018
  • Journal Name: SURVEY REVIEW
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Environment Index, Geobase, INSPEC
  • Keywords: GNNS, PPP, PPP-AR, Vertical displacements, GPS, DEFORMATION, RESOLUTION, ACCURACY, SERVICES, STATION

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.