Physics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..541c&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 40, May 1978, p. 541-548. Research supported by the Australian Research Gr
Physics
2
D Region, Data Recording, Ionospheric Drift, Signal Fading, Signal Processing, Statistical Correlation, Autocorrelation, Cross Correlation, Data Smoothing, Ionospheric Propagation, Mathematical Models, Signal Reflection, Wave Dispersion
Scientific paper
It is shown mathematically that the 'true' velocity V derived by full correlation analysis must change if the fading records are filtered unless the random fading parameter is zero. Therefore these changes of V cannot necessarily be attributed to dispersion in the records. The theory is confirmed by applying a numerical filter to fading records of D-region partial reflections, and then recomputing the parameters of the full correlation analysis. These parameters vary in the manner predicted by the theory. The significance of the results is discussed, with particular reference to the amount of instrumental smoothing which is allowable in ionospheric drift recording.
Briggs B. H.
Chandra Harish
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