Observations of field-aligned density fluctuations in the inner solar wind

摘要: This paper reports the results of radio wave scattering observations which show highly anisotropic density microstructure in inner solar wind. These were made October 1983 and 1985, using National Radio Astronomy Observatory's Very Large Array. Heliocentric distances ranged from 2.2. to about 13 radii. The axial ratio fluctuations, projected onto plane sky, increased 4 at 10 radii 14 2.2 major axis appeared be field aligned; that is, irregularities stretched out approximately along radial. are, general, consistent with earlier observations. present differ they taken closer sun, sensitive larger scale structures (up 35 km), showed much higher anisotropy. Combining these data previously strongly indicates anisotropy is dependent; scales greater than km appear more those less 2 km. 22 refs.