Improving dgnss performance through the use of network rtk corrections

Duojie Weng, Shengyue Ji, Yangwei Lu, Wu Chen, Zhihua Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The differential global navigation satellite system (DGNSS) is an enhancement system that is widely used to improve the accuracy of single-frequency receivers. However, distancedependent errors are not considered in conventional DGNSS, and DGNSS accuracy decreases when baseline length increases. In network real-time kinematic (RTK) positioning, distance-dependent errors are accurately modelled to enable ambiguity resolution on the user side, and standard Radio Technical Commission for Maritime Services (RTCM) formats have also been developed to describe the spatial characteristics of distance-dependent errors. However, the network RTK service was mainly developed for carrier-phase measurements on professional user receivers. The purpose of this study was to modify the local-area DGNSS through the use of network RTK corrections. Distancedependent errors can be reduced, and accuracy for a longer baseline length can be improved. The results in the low-latitude areas showed that the accuracy of the modified DGNSS could be improved by more than 50% for a 17.9 km baseline during solar active years. The method in this paper extends the use of available network RTK corrections with high accuracy to normal local-area DGNSS applications.

Original languageEnglish
Article number1621
JournalRemote Sensing
Volume13
Issue number9
DOIs
Publication statusPublished - 1 May 2021

Keywords

  • Accuracy
  • DGNSS
  • Distance-dependent errors
  • Network RTK

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this