The processing and interpretation of vertical and oblique sounding ionograms for ionosphere diagnostics on the base of chirp-ionosonde

In the paper the authors consider techniques and algorithms for secondary processing and interpretation of iono-grams obtained with the help of chirp ionosonde operating in vertical and oblique sounding mode (VS and OS). The secondary processing of experimental ionograms is carried out on the base of primary data filtering with subsequent compression with a help of cellular automaton technique. Ionogram interpretation methods is based on modeling results for frequency dependences of propagation characteristics in the regime of long-term forecast and on results of experimental data processing. We also develop the algorithm for electron concentration profile restoration on the base of HFC selected tracks.