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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: On the determination of the atmospheric outer scale length of turbulence using GPS phase difference observations: the Seewinkel network

Fig. 9

Processing steps to identify atmospheric noise. Left: \(\log_{2}\) variances of the IMF versus the IMF index. The red straight line corresponds to the fGn with H = 0.6, i.e. the best fit for \({\text{IMF}}_{2 - 4}\). The magenta line defines the domain of exclusion. The discrete blue dotted line represents the \(\log_{2}\) variance for the original observations. Right: top: the filtered time series as combination of the IMFs kept and at the bottom, its corresponding psd with the expected atmospheric slopes − 2/3 and − 8/3

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