Physics
Scientific paper
Mar 1965
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965jatp...27..309w&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 27, no. 3, pp. 309-320
Physics
1
Scientific paper
Observations of ionisation elongated along the earth's magnetic field have been carried out with a sensitive radar at a frequency of 300 Mc/s. A very weak signal was detected from a height of about 104 km and this was found to be present almost continuously even during very quiet magnetic conditions. The weak signals are believed to originate from field-aligned ionisation of meteoric origin. This means that in certain parts of the E-region there is a radar noise level much greater than that set by incoherent backscatter from the free electrons of the ionosphere.
Sutcliffe H. K.
Watkins C. D.
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