Correlation Lengths, the Ultrascale, and the Spatial Structure of Interplanetary Turbulence
W. H. Matthaeus, C. W. Smith and J. W. Bieber
Solar Wind 9, submitted (1999)
Characteristic length scales can be employed to describe the large scale structure and statistical features of solar wind turbulence. At least two outer scales of interplanetary turbulence, the correlation scale and an independent quantity that has been called the ``Ultra scale,'' have application in the theory of field line random walk and charged particle diffusion. This paper discusses interpretation of the outer scales, and presents some preliminary observational results concerning their radial evolution.
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