Por |
Chau Chong Shing, Jorge Luis; Kudeki, E.
(American Geophysical Union, 2013-08-24)
We show here that VHF signals scattered from the 150 km region above Jicamaca exhibit two distinct types of features. In one type (type A), the Doppler spectral width increases with the echo strength and the corresponding signal-to-noise ratio (SNR). A second type (type B) of higher SNR echoes exhibits ...