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Session A3: Atmospheric Effects, GNSS Remote Sensing and Scientific Applications

Ionospheric Scintillation Effects across Multiple Carrier Frequency Bands Transmitted from LEO Satellites
Andrew K. Sun, Korea Advanced Institute of Science and Technology; Y. Jade Morton, University of Colorado Boulder; Jiyun Lee, Korea Advanced Institute of Science and Technology
Location: Seaview Ballroom
Date/Time: Wednesday, Jan. 24, 4:23 p.m.

Peer Reviewed

Prior simulation studies have indicated that signals from LEO satellites exhibit higher signal dynamics and more significant scintillation effects compared to those transmitted from MEO satellites. This study employs a physics-based simulation model initiated with real GPS scintillation data. It extends the analysis to assess scintillation effects transmitted from LEO satellites across various carrier frequencies in the L band (L1, L2, and L5) and other bands (VHF, UHF, and S). The results provide quantitative evidence that signals at lower frequencies experience more frequent fades and higher phase dynamics. Analyses across various frequency bands validate that distinct signal dynamics determine the time scale of scintillation, resulting in temporal characteristics of frequency-dependent signal fading. The simulation also demonstrates a consistent rate of selective fading among different L-band signals across different signal dynamics. This frequency-selective fading allows the adaptation of inter-frequency aiding techniques in receivers to improve the robustness of LEO signal processing.

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