Affiliation:
1. Institute of Solar Terrestrial Physics SB RAS
Abstract
We present a scheme for modeling HF radio signal characteristics along paths of different lengths, which is based on the waveguide approach — the normal mode method. We use a representation of the recorded signal field in the form of Green function products of the angular operator, excitation coefficients, and reception coefficients of individual normal modes. Algorithms have been developed for calculating distance-frequency, frequency-angular, and amplitude characteristics of signals in large spatial regions through analysis and numerical summation of normal mode series. We have implemented a complex algorithm for simulating propagation conditions of HF radio signals, which includes a medium model, algorithms for calculating signal characteristics, and operational diagnostics of radio channel. We have compared the results of the HF signal propagation characteristic modeling and the experimental oblique sounding data obtained along paths of different lengths and orientation. To analyze experimental ionograms, determine the maximum usable frequencies for propagation modes along radio paths, we employ the method of automatic processing and interpretation of oblique sounding ionograms.
Publisher
Infra-M Academic Publishing House
Reference43 articles.
1. Anderson S. Cognitive HF radar. J. Eng. 2019, vol. 2019, iss. 20, pp. 6772–6776. DOI: 10.1049/joe.2019.0537., Anderson S. Cognitive HF radar. J. Eng. 2019, vol. 2019, iss. 20, pp. 6772–6776. DOI: 10.1049/joe.2019.0537.
2. Anyutin A.P., Orlov Yu.I. Space-time geometrical theory of diffraction of frequency-modulated radio signals in a homogeneous dispersive medium. J. Commun. Technol. Electron. 1977, vol. 22, no. 10, pp. 2082–2090., Anyutin A.P., Orlov Yu.I. Space-time geometrical theory of diffraction of frequency-modulated radio signals in a homogeneous dispersive medium. J. Commun. Technol. Electron. 1977, vol. 22, no. 10, pp. 2082–2090.
3. Avdeev V.B., Demin A.V., Kravtsov Yu.A., Tinin M.V., Yarygin A.P. The interferential integral method (review) Radiophys Quantum Electron. 1988, vol. 31, pp. 907–921., Avdeev V.B., Demin A.V., Kravtsov Yu.A., Tinin M.V., Yarygin A.P. The interferential integral method (review) Radiophys Quantum Electron. 1988, vol. 31, pp. 907–921.
4. Ayliffe J.K., Durbridge L.J., Gordon J.F., Gardiner-Garden R. The DST Group High-Fidelity, Multichannel Oblique Incidence Ionosonde. Radio Sci. 2019, vol. 54, no. 1, pp. 104–114. DOI: 10.1029/2018RS006681., Ayliffe J.K., Durbridge L.J., Gordon J.F., Gardiner-Garden R. The DST Group High-Fidelity, Multichannel Oblique Incidence Ionosonde. Radio Sci. 2019, vol. 54, no. 1, pp. 104–114. DOI: 10.1029/2018RS006681.
5. Baranov V.A., Karpenko A.L., Popov A.V. Evolution of Gaussian beams in the nonuniform Earth-ionosphere waveguide. Radio Sci. 1992, vol. 27, no. 2, pp. 307–314. DOI: 10.1029/ 91RS02639., Baranov V.A., Karpenko A.L., Popov A.V. Evolution of Gaussian beams in the nonuniform Earth-ionosphere waveguide. Radio Sci. 1992, vol. 27, no. 2, pp. 307–314. DOI: 10.1029/ 91RS02639.