Physics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15.1259c&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 15, Oct. 1988, p. 1259-1262. DFG-supported research.
Physics
41
Atmospheric Turbulence, Mesopause, Radar Measurement, Radar Scattering, Norway, Radar Echoes, Sensitivity, Summer
Scientific paper
A mobile VHF (53.5 MHz) radar on the island of Andoya in northern Norway was used to measure the aspect sensitivity of the very strong radar returns obtained from near the summer polar mesopause. This polar mesopause summer echo exhibits substantial aspect sensitivity, with angular polar diagrams of the backscatter of 2-10 degrees half-width for a 2-day average. The grating lobes of the antenna polar diagram were used as additional beams during a 3-h period in which the power recieved in the antenna vertical beam was particularly intense. In this case, the power returned at angles of 35 and 38 degrees off-zenith was obtained. The measurements are used to estimate the ratio of the specular to the turbulent contributions to the backscatter.
Czechowsky Peter
Reid Iain M.
Ruester Ruediger
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