Physics – Plasma Physics
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2881k&link_type=abstract
Geophysical Research Letters, Volume 24, Issue 22, p. 2881-2884
Physics
Plasma Physics
1
Space Plasma Physics: Nonlinear Phenomena, Radio Science: Radio Wave Propagation, Solar Physics, Astrophysics, And Astronomy: Corona
Scientific paper
Structure functions of arbitrary order are analyzed using differential phase scintillation data obtained during the fourth solar conjunction of the Ulysses spacecraft in February-March 1995. The scaling features of these structure functions clearly discriminate between electron density fluctuations observed in coronal holes versus coronal streamers. The second order structure function, which is related to the power spectrum, shows essentially a scaling exponent ζ(p)=α-2, where p=2 and α is the spectral index of the three-dimensional wavenumber spectrum of electron density fluctuations. Higher-order structure functions provide evidence that these fluctuations are scale dependent and do not follow Gaussian statistics.
Bird Michael K.
Karl J.
Pätzold Martin
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