Abstract
We report observations of electromagnetic wave-induced 557.7-nm emission in correspondence with a sporadic low-altitude plasma layer (the sporadic- layer, ). We show that the structure of 557.7-nm emission seen for some events results from a transformation of transmitted energy by ionization clouds, compiling the patchy type , and presents a projection of the sporadic- layer structure on the emission altitude. This allows us to propose the first method for visualizing a horizontal structure of sporadic- layers.
- Received 23 August 1999
DOI:https://doi.org/10.1103/PhysRevLett.85.218
©2000 American Physical Society