V.P. Uryadov1, G.G. Vertogradov2, F.I. Vybornov3

1,3 Research Radiophysical Institute of Nizhny Novgorod State University n.a. N.I. Lobachevsky
(Nizhny Novgorod, Russia)
2 Southern Federal University (Rostov-on-Don, Russia)
3 Volga State University of Water Transport (Nizhny Novgorod, Russia)
 

Setting the problem. Currently, interest remains in over-the-horizon HF radar systems with the use of different configurations of ionosondes for detecting and positioning ionospheric irregularities. Compared to traditional monostatic (active) radars, the advantages of passive HF radars are significantly lower cost, high resistance to electronic suppression and higher survivability and recovery from disturbances.

Purpose. To consider the possibility of observing the use of a standard chirp ionosonde and chirp ionosonde - radio direction finder as a receiver of a passive over-the-horizon bistatic radar on paths for detecting and positioning ionospheric irregularities responsible for the appearance of anomalous (scattered) signals.

Results. The results of observations and simulations are presented, illustrating the possibilities of using a standard chirp ionosonde and chirp ionosonde – radio direction finder as a receiver of a passive over-the-horizon bistatic radar on the long paths Inskip (England) – Rostov-on-Don, Cyprus – Rostov-on-Don and Laverton (Australia) – Rostov-on-Don for the detection and positioning of ionospheric irregularities.

Practical significance. The use of wideband chirp ionosonde - radio direction finder allows to control the entire mode structure of the received signal, including abnormal signals, and to determine all key characteristics of HF signals scattered/reflected from air objects in frequency-range-azimuth-angle coordinates.

Uryadov V.P., Vertogradov G.G., Vybornov F.I. Passive over-the-horizon HF radiolocation using chirp ionosondes of different configurations for detecting and positioning ionospheric irregularities. Science Intensive Technologies. 2022. V. 23. № 5. P. 25−33. DOI: https://doi.org/10.18127/j19998465-202205-04 (in Russian)

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