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|Title:||Ionospheric Modelling during the Past Decades|
|Abstract:||Starting with oversimplified models (e.g. reflecting mirror) geometrical optics in a parabolic layer achieved a satisfactory explanation of the most important phenomena in ionospheric hf-propagation. Later, more detailed descriptions of the electron-density profile were developed, e.g. the International Reference Ionosphere. These are based on ground and space observations. The C.C.I.R. 'numerical maps' describing the world-wide behaviour of the peak data are rediscussed now. Sophisticated theoretical models based on aeronomic theory have been developed during the last 15 years. These need an enormous computing effort.|
|ISSN:||0975-105X (Online); 0367-8393 (Print)|
|Appears in Collections:||IJRSP Vol.15(5&6) [October & December 1986]|
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