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Wave-Number Spectra and Intermittency in the Terrestrial Foreshock Region
2006
Physical Review Letters
Wave-number spectra of magnetic field fluctuations are directly determined in the terrestrial foreshock region (upstream of a quasiparallel collisionless shock wave) using four-point Cluster spacecraft measurements. The spectral curve is characterized by three ranges reminiscent of turbulence: energy injection, inertial, and dissipation range. The spectral index for the inertial range spectrum is close to Kolmogorov's slope, ÿ5=3. On the other hand, the fluctuations are highly anisotropic and
doi:10.1103/physrevlett.97.191101
pmid:17155608
fatcat:y4nfjraxp5aodgvt6f63oemtvi