Search Results - "Vertogradov, V. G."

Oblique Chirp Sounding and Prediction of the Maximum Usable Frequency on the Middle- and Long-Distance Paths by Vertogradov, G. G., Vertogradov, V. G.

“…We present the results of experimental studies of the maximum observed frequency (MOF) variations in 2016–2019 on the middle- (Cyprus—Rostov-on-Don) and…”
Get full text

Generation of the Super Small-Scale Artificial Ionospheric Irregularities in the Ionosphere Pumped by High-Power HF Radio Waves by Frolov, V. L., Bolotin, I. A., Vertogradov, G. G., Vertogradov, V. G.

“…We present the results of experimental studies of generation of super small-scale plasma-density irregularities in the ionospheric F 2 region pumped by a…”
Get full text

Probing of medium-scale traveling ionospheric disturbances using HF-induced scatter targets by Blagoveshchenskaya, N. F., Borisova, T. D., Kornienko, V. A., Moskvin, I. V., Rietveld, M. T., Frolov, V. L., Uryadov, V. P., Kagan, L. M., Yampolski, Yu. M., Galushko, V. L., Koloskov, A. V., Kasheev, S. B., Zalizovski, A. V., Vertogradov, G. G., Vertogradov, V. G., Kelley, M. C.

“…Experimental results from the Tromsø and Sura heating experiments at high and mid-latitudes are examined. It is shown that the combination of HF-induced target…”
Get full text

Chirp Ionosonde–Radiodirection Finder as a New Tool for Studying the Ionosphere and Radio-Wave Propagation by Vertogradov, G. G., Uryadov, V. P., Vertogradova, E. G., Vertogradov, V. G., Kubatko, S. V.

“…Hardware of a chirp ionosonde–radiodirection finder, which, along with the conventional parameters, measures angular frequency characteristics on oblique…”
Get full text

Drift Velocity of Small-Scale Artificial Ionospheric Irregularities According to a Multifrequency HF Doppler Radar. II. Observation and Modeling Results by Vertogradov, G. G., Uryadov, V. P., Vertogradov, V. G., Vertogradova, E. G., Kubatko, S. V.

“…We present the results of observations of the Doppler frequency shift for the radar radio signals of broadcast and exact-time RWM stations, which are scattered…”
Get full text

Drift Velocity of Small-Scale Artificial Ionospheric Irregularities According to Multifrequency HF Doppler Radar. I. Method of Calculation and Its Hardware Implementation by Vertogradov, G. G., Uryadov, V. P., Vertogradov, V. G., Vertogradova, E. G., Kubatko, S. V.

“…The method of calculating the total drift velocity vector of small-scale artificial ionospheric irregularities as measured by the effective Doppler frequency…”
Get full text

Generation of Artificial Ionospheric Irregularities in the Midlatitude Ionosphere Modified by High-Power High-Frequency X-Mode Radio Waves by Frolov, V. L., Bolotin, I. A., Komrakov, G. P., Pershin, A. V., Vertogradov, G. G., Vertogradov, V. G., Vertogradova, E. G., Kunitsyn, V. E., Padokhin, A. M., Kurbatov, G. A., Akchurin, A. D., Zykov, E. Yu

“…We consider the properties of the artificial ionospheric irregularities excited in the ionospheric F 2 region modified by high-power high-frequency X-mode…”
Get full text

On specific features of diurnal variations in characteristics of the diagnostic stimulated electromagnetic emission and their relation to the evolution of artificial ionospheric irregularities by Frolov, V. L., Vertogradov, G. G., Vertogradov, V. G.

“…We analyze variations in characteristics of the diagnostic stimulated electromagnetic emission of the ionosphere in the evening hours including the times of…”
Get full text

Monitoring of wave-like disturbances by means of oblique sounding of the ionosphere by Vertogradov, G G, Vertogradov, V G, Uryadov, V P

“…We present the results of experimental studies of ionospheric wave-like disturbances on the basis of oblique chirp sounding data for the mid-latitude paths…”
Get full text

Splitting of the Doppler frequency shift of bi-static backscatter signals during the Sura experiments by Borisova, T. D., Blagoveshchenskaya, N. F., Kornienko, V. A., Frolov, V. L., Vertogradov, G. G., Vertogradov, V. G.

“…The experimental studies of the specific behavior of small-scale artificial ionospheric irregularities at midlatitudes, performed using the Sura HF heating…”
Get full text

The wideband attenuation of short radio waves on mid-latitude paths during X-ray flares in January 2005 by Vertogradov, G G, Uryadov, V P, Vertogradov, V G

“…We present the results of the ionosphere oblique chirp sounding on the Cyprus--Nizhny Novgorod, Cyprus--Rostov-on-Don, and Moscow--Rostov-on-Don mid-latitude…”
Get full text

Field-aligned scattering of HF radio waves under conditions of action of high-power oblique radio waves on the ionosphere by Uryadov, V. P., Vertogradov, G. G., Vertogradov, V. G., Komrakov, G. P., Cherkashin, Yu. N., Vas’kov, V. V.

“…We present the results of experimental studies of the features of field-aligned scattering of HF radio waves for different angles of incidence of high-power…”
Get full text

Oblique Sounding and Modeling of the Ionospheric HF Channel by Vertogradov, G.G., Uryadov, V.P., Vertogradov, V.G.

“…We present the results of experimental studies of the distance-frequency and amplitude-frequency characteristics of the ionospheric HF channel on mid-latitude…”
Get full text

Prediction of the maximum observed frequency of the ionospheric HF radio channel using the method of artificial neural networks by Barkhatov, N. A., Revunov, S. E., Vertogradov, G. G., Vertogradov, V. G., Valov, V. A., Uryadov, V. P.

“…The algorithm for predicting one of the main parameters of the ionospheric HF radio channel--maximum observed frequency (MOF)--for the interval 0.5-3 h has…”
Get full text

Results of integrated studies of the perturbed ionosphere region using short-wave ranging in a wide frequency band and stimulated electromagnetic emission of the ionosphere by Sergeev, E. N., Zykov, E. Yu, Akchurin, A. D., Nasyrov, I. A., Vertogradov, G. G., Vertogradov, V. G., Kim, V. Yu, Polimatidi, V. P., Grach, S. M.

“…We present the results of studying simultaneously the dynamics of artificial plasma irregularities in the range of decameter scales l⊥ ≈ 7–125 m being…”
Get full text

Cluster structure of artificial ionospheric turbulence according to the data of the radar measurements by the radio-direction finder ionosonde by Vertogradov, G. G., Vertogradova, E. G., Uryadov, V. P., Vertogradov, V. G., Komrakov, G. P., Krasheninnikov, I. V., Cherkashin, Yu. N., Valov, V. A., Bredikhin, D. V., Makarov, A. V.

“…We present the results of experimental studies of an artificial ionospheric turbulence, which were obtained using the radio-direction finder ionosonde with…”
Get full text

Gyroharmonic features of the hf-induced ionospheric irregularities by Frolov, V. L., Bolotin, I. A., Komrakov, G.P., G.Vertogradov, G., Vertogradov, V. G., Vertogradova, E. G., Akchurin, A. D., Bochkarev, V. V., Dresher, A. M., Zykov, E. Yu, Katypov, R. R., Petrova, I. R., Yusupov, K. M., Kunitsyn, V. E., Padokhin, A. M., Kurbatov, G. A.

“…Gyroharmonic features of the different-scale artificial plasma-density irregularities excited by HF modification of the ionospheric F 2 region under conditions…”
Get full text

Spatio-temporal correlation of the maximum observable frequency on midlatitude radio lines by Barkhatova, O. M., Uryadov, V. P., Vertogradov, G. G., Vertogradov, V. G.

“…We present the results of studying the spatial and temporal correlation of the maximum observable frequency on two midlatitude paths, Inskip…”
Get full text

Sounding of an artificially perturbed ionosphere by means of an ionosonde/position finder with chirp modulation of the signal by Uryadov, V. P., Vertogradov, G. G., Vertogradov, V. G., Kubatko, S. V., Ponyatov, A. A., Cherkashin, Yu. N., Krasheninnikov, I. V., Valov, V. A., Komrakov, G. P., Makarov, A. V., Bredikhin, D. V.

“…We describe the operation of an ionosonde/position finder with chirp modulation of the signal. The first results of measuring the characteristics of short-wave…”
Get full text

Structure and dynamics of the ionospheric region with artificial small-scale irregularities according to complex measurements of the scattered radio-signal characteristics by Uryadov, V. P., Vertogradov, G. G., Ponyatov, A. A., Vertogradov, V. G., Kubatko, S. V., Cherkashin, Yu. N., Krasheninnikov, I. V., Komrakov, G. P., Valov, V. A.

“…We present the results of complex measurements of characteristics of HF radio signals scattered by artificial small-scale irregularities by means of oblique…”
Get full text