Estimates of Eq. (2) (filled blue circles for positive ϵ, and white circles for negative ϵ) using LPDE. The horizontal line is the average value (solid for positive, dashed for negative). The isotropic estimate from Eq. (3) (solid green lines for positive values, and dashed lines for negative values). The ion inertial length d_i and the correlation length λ_c are indicated in each panel. The different estimates of the isotropic cascade rate were obtained within the shaded green areas between 1.2d_i and 0.8λ_c. Panels (a)-(e) correspond to intervals I-V, respectively.