Analysis of ionospheric scintillation and its impact on PPP at low latitudes

Kai Guo, Marcio Aquino, Sreeja Vadakke Veettil, Zhizhao Liu, Wu Chen, Haroldo Antonio Marques

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)


Ionospheric scintillation refers to the random and rapid fluctuations in the amplitude and phase of radio signals that occur due to their propagation through plasma density irregularities in the ionosphere. For Global Navigation Satellite System (GNSS), scintillation can seriously degrade satellite signal quality and consequently the positioning accuracy, particularly at high and low latitude regions, where ionospheric disturbances are more frequent. This study analyzes the effects of scintillation on Global Positioning System (GPS) Precise Point Positioning (PPP), by making use of scintillation data recorded in Hong Kong during the solar maximum of 2014. Significant positioning error values of as much as 1.34 m in the up direction are observed with kinematic PPP processing under strong scintillation. The variations in the standard deviations of the carrier phase residuals in relation to satellite elevations and scintillation levels are investigated for the first time in this region. It is found that the standard deviation of carrier phase residuals increases depending on scintillation intensity. This study is important to help better understand the scintillation characteristics and its effects on GPS-based positioning in the Hong Kong region. It can also help in modelling the relationship between scintillation and carrier phase residuals, which can be of use in the development of scintillation mitigation approaches for PPP processing.

Original languageEnglish
Title of host publicationION 2019 Pacific PNT Meeting Proceedings
PublisherThe Institute of Navigation
Number of pages11
ISBN (Electronic)0936406224, 9780936406220
Publication statusPublished - 2019
EventInstitute of Navigation 2019 Pacific Positioning, Navigation and Timing Meeting, PACIFIC PNT 2019 - Honolulu, United States
Duration: 8 Apr 201911 Apr 2019

Publication series

NameProceedings of the Institute of Navigation Pacific Positioning, Navigation and Timing Meeting, Pacific PNT
ISSN (Print)2331-6284


ConferenceInstitute of Navigation 2019 Pacific Positioning, Navigation and Timing Meeting, PACIFIC PNT 2019
Country/TerritoryUnited States


  • Carrier phase residuals
  • GPS
  • Ionospheric scintillation
  • Kinematic PPP

ASJC Scopus subject areas

  • Transportation
  • Ocean Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Computer Science Applications


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