PLUMEX I: Coincident Radar and Rocket Observations of Equatorial Spread-F.
NAVAL RESEARCH LAB WASHINGTON DC
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Coordinated measurements of equatorial spread-F conducted during July 1979 at the Kwajalein Atoll have yielded the first definitive space and time coincident radar and rocket observations of small scale irregularities and large scale plasma depletions. The results have shown that a Within a large-scale topside F-layer depletion radar backscatter energy is at a level much lower than that observed on the depletions topside. The same is true of in situ irregularity observations, and b Ion composition within a topside depletion can provide signatures of its bottomside source domain and estimates of average maximum vertical drift velocity. For long-lived depletions, molecularion signatures NO and O2 can be lost while bottomside levels of N can be maintained when O approximately equals N sub e much greater than NO O2, and finally, c Large scale fluctuations of O accompanied by a near-constant level of NO and O2 on the bottomside F-layer gradient suggests that neutral atmospheric turbulence is not a major source for bottomside ionospheric plasma irregularities.
- Atmospheric Physics
- Plasma Physics and Magnetohydrodynamics