Fig. 7
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Reduced ACF of the low pass Altered map in three different directions. Blue line: x-direction (y = 0). Purple line: y-direction (x = 0). Red line: π/4 or x = y-direction. Green line: exponential pro Ale giving an estimate of the rate of decay (here λ/L 5 × 10–2). A strong anisotropy is present in the x direction at large scales (x/L ≥ 2 × 10–2).
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