Observations of fine scale structure in the mesosphere and lower thermosphere

Details Observations of fine scale structure in the mesosphere and lower thermosphere Observations of fine scale structure in the mesosphere and lower thermosphere

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..179t&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 43, Mar. 1981, p. 179-189.

Computer Science

Sound

54

Electrostatic Probes, Fine Structure, Mesosphere, Rocket Sounding, Space Plasmas, Thermosphere, Gas Density, Magnetohydrodynamic Stability, Neutral Gases, Power Spectra

Scientific paper

The measurements made by the electrostatic probe designed to measure ion density with high time resolution and accuracy that was flown on a Nike-Apache rocket on Mar. 1, 1978, are discussed. Spectra of the spatial density fluctuations are derived from the measurements in 1 km height intervals from 65 to 127 km. It is found that the power spectra below 95 km have a slope of approximately -5/3, as expected for isotropic turbulence. The relationship between the observed fluctuations in ion density and the corresponding fluctuations in neutral gas density is discussed. The fluctuations above 95 km are found to be stronger and to exhibit a white noise power spectrum. These fluctuations are thought to derive from plasma instabilities.

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