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Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

From: Atmospheric modes excited by the 2021 August eruption of the Fukutoku-Okanoba volcano, Izu–Bonin Arc, observed as harmonic TEC oscillations by QZSS

Fig. 7

a High-pass filtered slant TEC time series5:20–8:50 at the 2007 station observed using J07 satellite calculated with three different combinations of L1, L2, and L5 carrier phases. b Standard deviations of slant TEC σtot obtained by the three combinations as a function of the frequency factor F in Eq. (1). Three curves correspond to Period 1 (5:20–6:20), Period 2 (6:20–7:20) and Period 3 (7:20–8:20). c Receiver noises σrx remain nearly constant, while ionospheric scintillation σion decays rapidly with time. The receiver noise σrx is scaled with the frequency factor for the L1–L2 combination

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