Paper Info
Title
Cycle Slip Detection during High Ionospheric Activities Based on Combined Triple-Frequency GNSS Signals.
Abstract
The current cycle slip detection methods of Global Navigation Satellite System (GNSS) were mostly proposed on the basis of assuming the ionospheric delay varying smoothly over time. However, these methods can be invalid during active ionospheric periods, e.g., high Kp index value and scintillations, due to the significant increase of the ionospheric delay. In order to detect cycle slips during high ionospheric activities successfully, this paper proposes a method based on two modified Hatch-Melbourne-Wubbena combinations. The measurement noise in the Hatch-Melbourne-Wubbena combination is minimized by employing the optimally selected combined signals, while the ionospheric delay is detrended using a smoothing technique. The difference between the time-differenced ambiguity of the combined signal and this estimated ionospheric trend is adopted as the detection value, which can be free from ionospheric effect and hold the high precision of the combined signal. Five threshold determination methods are proposed and compared to decide the cycle slip from the magnitude aspect. This proposed method is tested with triple-frequency Global Navigation Satellite System observations collected under high ionospheric activities. Results show that the proposed method can correctly detect and fix cycle slips under disturbed ionosphere.
Year
DOI
Venue
2019
10.3390/rs11030250
REMOTE SENSING
Keywords
Field
DocType
GNSS ionospheric bias mitigation,cycle slip,combined signals,HMW combination
Cycle slip,Magnitude (mathematics),Monad (category theory),Ionosphere,Satellite system,Remote sensing,Smoothing,GNSS applications,Geology
Journal
Volume
Issue
ISSN
11
3
2072-4292
Citations 
PageRank 
References 
0
0.34
1
Authors
4
Name
Order
Citations
PageRank
Dongsheng Zhao100.34
Craig M. Hancock2113.60
Gethin Wyn Roberts382.00
Shuanggen Jin43727.19