Physics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38..449r&link_type=abstract
(International Union of Radio Sciences, General Assembly, 18th, Lima, Peru, Aug. 8-19, 1975.) Journal of Atmospheric and Terrest
Physics
5
Atmospheric Scattering, Atmospheric Turbulence, Mesosphere, Radio Echoes, Radio Scattering, Energy Dissipation, Gravity Waves, Turbulence Effects, Upper Atmosphere
Scientific paper
Strong intermittency of coherent VHF radio echoes from 70-80 km height, observed at Jicamarca, Peru, suggests the existence of sudden bursts in the rate at which energy is dissipated per unit mass by turbulence. It is shown that the observed correlation between the power and correlation time of these echoes implies that stronger turbulence occurs in thinner layers. A detailed analysis of the autocorrelation function of the echoes shows the presence of discrete layers of turbulence, with a minimum thickness of a few tens of meters, and a minimum separation of about 1 km. The horizontal size of these layers is estimated from echoes observed simultaneously from mesospheric regions separated by about 4.5 km, and is compared with the horizontal wavelength of gravity waves observed in the mesosphere.
Bowhill S. A.
Rastogi Pramod K.
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