THE EVOLUTION OF AN ARTIFICIAL IONOSPHERIC PLASMA CLOUD AS STUDIED BY HF AND VHF RADAR
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
A plasma cloud was created at an altitude of 94 km over Wallops Island by exploding a canister of a cesium compound, which had been fired from a 7-in. gun. This cloud was illuminated from NRL by hf and vhf radar. The results of coherent pulse doppler analysis of the cesium cloud signature indicate that the cloud evolved in a billowy manner, with turbulent eddies of about 10,000 sq m cross section appearing at several times within the nominal 70-sec duration of the signature. It was the presence of large-amplitude, specular echo components in the cloud signature that led to the suggested behavior of a cloud evolving in a billowy manner. The fact that these could be due instead to transient resonances in the plasma cloud cannot be completely discounted.
- Atmospheric Physics
- Plasma Physics and Magnetohydrodynamics