Date of Award
Program or Major
Doctor of Philosophy
Measurements of the ion distribution function, electron density, wave activity, and convection electric field have been made in situ by a sounding rocket flown through the artificially heated F layer ionosphere over Arecibo, Puerto Rico. The ion distributions show the effect of the HF heater through elevated effective temperatures, superthermal fluctuation level, and a plume-like population of energetic ions drifting out of the HF reflection region. The electron density, from a Langmuir probe, shows meter-scale depletions of $\sim$10% in the immediate vicinity of the reflection height, both above and below (Kelley et al., 1995). A shear in the convection electric field observed at the reflection layer can be interpreted as the return current at the westward edge of a heater driven current system.
The payload also passed within 2.2 km of the Arecibo 430 MHz incoherent scatter radar (ISR) beam, where a burst of energetic ions was observed, preceded by coherent wave activity in both the Langmuir and electric field double-probe. A cross spectral analysis indicates that the waves originate from the ISR beam.
Peria, William James, "Rocket observations of the HF heated ionosphere" (1996). Doctoral Dissertations. 1897.