Title
PPP Performance with Large TEC Gradient and Mitigation Methods
Abstract
During high-level solar activity time, frequent ionospheric irregularities lead to large total electron content (TEC) gradient. precise point positioning (PPP) performance can be significantly degraded under the unfavorable ionosphere conditions. We analyze the causes and effects of the ionosphere potential impacts on uncombined PPP (UPPP) performance in terms of the ionospheric stochastic model, blunders, and frequent cycle slips. Results show that a large enough stochastic variance is beneficial for better positioning solutions; blunders detection could improve the accuracy; a proper threshold to detect cycle slips could improve the accuracy significantly. Taking these effects into consideration, we can achieve a centimeter accuracy at each direction under the disturbed ionosphere conditions.
Year
DOI
Venue
2020
10.23919/ENC48637.2020.9317526
2020 European Navigation Conference (ENC)
Keywords
DocType
ISBN
Uncombined PPP (UPPP),Unfavorable or disturbed ionosphere,larger TEC gradient,ionosphere irregularity,Stochastic Ionosphere Parameter (SIP)
Conference
978-1-7281-4430-6
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Xiang Yan16617.39
Wei Wang220258.31
Xi Chen333370.76
Wenxian Yun400.34