The reduction of ionograms from the bottomside and topside

Details The reduction of ionograms from the bottomside and topside The reduction of ionograms from the bottomside and topside

Aug 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965jatp...27..917d&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 27, no. 8, pp. 917-936, IN3, 937-941

Physics

2

Scientific paper

A method is discussed for reducing ionograms to electron density height profiles on a modern digital computer by a representation in terms of parabolic laminations. This provides good accuracy without an excessive number of scaled points. Since no precomputed coefficients are used, ionograms may be scaled at any frequency and from any location. It is shown how a least squares joint ordinary and extraordinary analysis enable a correction to be made for underlying ionization, and reduces sensitivity to scaling errors. Some special features of topside ionograms are discussed. Formulation in terms of segments parabolic in log (plasma frequency) is especially efficient in terms of matching layer shape without discontinuity of slope. Techniques for incorporating the variation of gyrofrequency with altitude are discussed. It is particularly emphasized that significant errors in the deduced electron scale height can be made if this is not done adequately.

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