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Time variation of the tracking jitter variance estimated using the formula of Conker et al. (2003) for GPS L1C/A from satellite PRN3 on 11 March 2011. Middle panel: Variation of the tracking jitter variance as a function of the amplitude scintillation index, S4. Bottom panel: Variation of the tracking jitter variance as a function of the phase scintillation index, σϕ.
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