Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39.1023b&link_type=abstract
(IUGG, IAGA, COSPAR, URSI, NOAA, USAF, Australian Academy of Science, and Australian Institute of Physics, International Symposi
Physics
4
Ionospheric Drift, Radio Observation, Reception Diversity, Signal Fading, Drift Rate, Electrojets, Gravity Waves, Propagation Velocity, Radio Echoes, Wind Profiles
Scientific paper
Three closely spaced aerials operating on frequencies between 2 and 6 MHz, were employed to analyze time shifts of fading radio waves reflected from the ionosphere. Attention is given to the various velocity components of ionospheric drift: neutral air, ionization, ionized irregularities, and gravity waves. For the purposes of the study, the ionosphere is divided into three discrete areas: the D-region, in which the partial reflection drift technique (PRD) is used to obtain time resolution of gravity waves, and to measure wind profiles; the E-region (both electrojet and non-electrojet); and the F-region, where drift velocity was seen to decrease in proportion to sunspot activity, and small-scale irregularities were observed. A Fourier analysis is used to obtain a velocity for each frequency studied; and by using more than one frequency, vertical drift velocities could also be measured.
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