We performed experiments using the 50-MHz Jicamarca radar to study the equatorial 3-m scale plasma irregularities which are responsible for the radar backscatter called 15-km echoes observed at upper E-region heights from approximately 140 to 170 km. These studies were motivated by the search for a ...

Millions of meteoroids strike and disintegrate in the Earth's upper atmosphere every day and may be seen as visible or radar meteors. Although very few of the these foreign bodies actually make it to the surface of the Earth, they have been known to cause damage to satellites and are also the only ...