Title :
Extraction, analysis and interpretation of digital ionograms
Author :
Bartlett, A. ; Gallagher, M. ; Darnell, M.
Author_Institution :
Hull-Lancaster Commun. Res. Group, UK
Abstract :
A digital ionogram is constructed from the impulse responses of sampled channels. If each sampled channel is processed in isolation, random channel noise is often interpreted as a true propagation mode. To overcome this problem, several adjacent channels can be processed together. The improvement of the impulse response and displayed ionogram by the application of median filters and low pass spatial filters is presented
Keywords :
filtering and prediction theory; ionospheric electromagnetic wave propagation; low-pass filters; radiowave propagation; signal processing; spatial filters; telecommunication channels; transient response; adjacent channels; digital ionograms; impulse responses; ionograms analysis; ionograms extraction; ionograms interpretation; low pass spatial filters; median filters; propagation mode; random channel noise; sampled channels;
Conference_Titel :
HF Radio Systems and Techniques, 1994., Sixth International Conference on
Conference_Location :
York
Print_ISBN :
0-85296-616-4
DOI :
10.1049/cp:19940507
