Journal
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume 68, Issue 5, Pages 4391-4403Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2019.2903988
Keywords
Ionospheric scintillation; mitigation; precise point positioning (PPP); scintillation-induced error
Categories
Funding
- European Commission (EC)
- FAPESP [06/04008-2]
- National Institute of Science and Technology GNSS Technology to Support Air Navigation (INCT GNSS-NavAer)
- CNPq (National Council for Scientific and Technological Development) [465648/2014-2]
- FAPESP (Sao Paulo Research Foundation) [2017/01550-0]
- CAPES (Coordination for the Improvement of Higher Education Personnel)
- Federal Institute of Education, Science and Technology of Sao Paulo (IFSP)
- CAPES (Research Grant at the University of Bath) [19-2016/Process 88881.134266/2016-01]
- CNPq [314043/2018-7]
Ask authors/readers for more resources
At equatorial latitudes, ionospheric scintillation is the major limitation in achieving high-accuracy GNSS positioning. This is because scintillation affects the tracking ability of GNSS receivers causing losses of lock and degradation on code pseudo-range and carrier phase measurements, thus degrading accuracy. During strong ionospheric scintillation, such effects are more severe and GNSS users cannot rely on the integrity, reliability, and availability required for safety-critical applications. In this paper, we propose a novel approach able to greatly reduce these effects of scintillation on precise point positioning (PPP). Our new approach consists of three steps: 1) a new functional model that corrects the effects of range errors in the observables; 2) a new stochastic model that uses these corrections to generate more accurate positioning; and 3) a new strategy to attenuate the effects of losses of lock and consequent ambiguities re-initializations that are caused by the need to re-initialize the tracking. We demonstrate the effectiveness of our method in an experiment using a 30-day static dataset affected by different levels of scintillation in the Brazilian southeastern region. Even with limitations imposed by data gaps, our results demonstrate improvements of up to 80% in the positioning accuracy. We show that, in the best cases, our method can completely negate the effects of ionospheric scintillation and can recover the original PPP accuracy that would have existed without any scintillation. The significance of this paper lies in the improvement it offers in the integrity, reliability, and availability of GNSS services and applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available