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Detection algorithm of ionospheric delay anomaly based on multi-reference stations for ionospheric scintillationDetection algorithm of ionospheric delay anomaly based on multi-reference stations for ionospheric scintillation

Other Titles
Detection algorithm of ionospheric delay anomaly based on multi-reference stations for ionospheric scintillation
Authors
유윤자조득재박상현신미영
Issue Date
2011
Publisher
한국항해항만학회
Keywords
GPS anomaly; solar storm; ionospheric delay anomaly; integrity monitoring
Citation
한국항해항만학회지, v.35, no.9, pp 701 - 706
Pages
6
Journal Title
한국항해항만학회지
Volume
35
Number
9
Start Page
701
End Page
706
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1101
ISSN
1598-5725
2093-8470
Abstract
Radio waves including GPS signals, various TV communications, and radio broadcasting can be disturbed by a strong solar storm, which may occur due to solar flares and produce an ionospheric delay anomaly in the ionosphere according to the change of total electron content. Electron density irregularities can cause deep signal fading, frequently known as ionospheric scintillation, which can result in the positioning error using GPS signal. This paper proposes a detection algorithm for the ionosphere delay anomaly during a solar storm by using multi-reference stations. Different TEC grid which has irregular electron density was applied above one reference station. Then the ionospheric delay in zenith direction applied different TEC will show comparatively large ionospheric zenith delay due to the electron irregularity. The ionospheric slant delay applied an elevation angle at reference station was analyzed to detect the ionospheric delay anomaly that can result in positioning error. A simulation test was implemented and a proposed detection algorithm using data logged by four reference stations was applied to detect the ionospheric delay anomaly compared to a criterion.
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