Characteristics of Low-latitude Signal Fading Across the GPS Frequency Bands

Yu Jiao, Yu Morton, Steve Taylor, Mark Carroll

Abstract:	Deep signal fading occurring during ionospheric scintillation poses threat to GNSS signal processing and positioning accuracy. In this paper, multi-band raw intermediate-frequency GPS data collected at Ascension Island in March 2013 are processed to characterize signal fading across GPS signal bands. Several software algorithms were developed to ensure robust tracking of GPS signals throughout strong scintillation events. Based on high-rate measurements of the signal intensity and carrier-to-noise ratio, statistical results have been obtained concerning the relationships of scintillation indices and signal intensity across different GPS bands. A variety of fading features under different fading levels are analyzed. The discussion of fading on L2C and L5 is the highlight of this study, and fading overlaps across frequency bands are addressed for the first time in this paper.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	1203 - 1212
Cite this article:	Jiao, Yu, Morton, Yu, Taylor, Steve, Carroll, Mark, "Characteristics of Low-latitude Signal Fading Across the GPS Frequency Bands," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 1203-1212.
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