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Omsk, Russia

Blagoveshchensky D.V.,Saint Petersburg State University | Maltseva O.A.,Southern Federal University | Anishin M.M.,PJSC ONIIP | Rogov D.D.,Arctic and Antarctic Research Institute
2015 International Siberian Conference on Control and Communications, SIBCON 2015 - Proceedings | Year: 2015

The majority of ionospheric models are climatologic, including the International Reference Ionosphere model IRI used in the present paper. Adaptation of model to parameters of current diagnostics is necessary for interpretation of results of measurements in specific days and investigation of features of HF propagation along parts. The most widespread and accessible parameter is a critical frequency foF2, however in high-latitude zones there are no enough ionosondes. It is shown that usage of the total electron content of the ionosphere TEC measured by navigation satellites allows us to fill this gap however a discrepancy with the experimental values of maximum usable frequency MUF is preserved. The full correspondence of model and observational MUF can be achieved by adaptation of the model to values of a maximum height hmF2. It is indicated that as ionosondes do not always provide the information about hmF2, it is necessary to attract the data of low-orbiting satellites. Conclusions were made according to data of high-latitude Russian paths in length from 400 to more than 4,000 km in quiet conditions of February 2014. © 2015 IEEE. Source


Barabashov B.G.,Southern Federal University | Pelevin O.Y.,Southern Federal University | Anishin M.M.,PJSC ONIIP
2015 International Siberian Conference on Control and Communications, SIBCON 2015 - Proceedings | Year: 2015

A new approach to predicting the quality of binary message transmission via a narrowband shortwave channel is proposed. This approach is based on using the adaptive simulation model of channel which describes actual mechanisms of short wave propagation in magneto-active spatially non-uniform ionosphere in connection to specific helio-and geophysical conditions. Resultantly, quality of transmission is predicted with accounting for expected structure of the field at a reception site, and time variations of signal level. © 2015 IEEE. Source


Lozhnikov A.,PJSC ONIIP | Lepetaev A.,RAS Institute of Radio Engineering and Electronics
IFCS 2014 - 2014 IEEE International Frequency Control Symposium, Proceedings | Year: 2014

SC-cut resonators have disadvantage the low resistance of B - mode, making it difficult to use in some cases. Using a FEM calculations was determined the surface density of the polarization charges of C and B modes at SC-cut resonator plate. Based at these calculations was manufactured and measured parameters of few constructions. As result, the SC-cut resonators with resistance ratio B-mode to C-mode more than 2. © 2014 IEEE. Source


Tiumentcev A.I.,PJSC ONIIP | Khrolenko T.S.,PJSC ONIIP
CriMiCo 2014 - 2014 24th International Crimean Conference Microwave and Telecommunication Technology, Conference Proceedings | Year: 2014

The problems of creation of circuits of band pass tunable filters of VHF range with use of varicaps are considered. Possibility of transformation of elements of the circuit for the purpose of achievement of the necessary nominal of elements of the circuit is shown. The experimental inspection, which has shown good compliance of settlement and experimental results, is carried out. © 2014 CriMiCo'2014 Organizing Committee, CrSTC. Source


Sidorenko K.A.,PJSC ONIIP | Vasenina A.A.,PJSC ONIIP
Advances in Space Research | Year: 2016

In recent time, GLONASS/GPS signals are widely used for continuous monitoring of the ionospheric plasma conditions. However the ground-based GLONASS/GPS station for sounding of the ionosphere cannot provide high spatial resolution. To solve this problem, ionospheric models are used. In this article the algorithm of ionospheric model adaptation according to GLONASS/GPS data is offered. The expediency of use as the adaptive parameter values of the solar 10.7. cm radio flux index, which characterizes the level of solar activity, is shown. The adaptation parameter is defined by the minimization of the difference between the correlation matrices of the experimental and modeled TEC values. Reducing errors in the determination of ionospheric parameters in comparison with the simulation results is confirmed by experimental works in Moscow. © 2016 COSPAR. Source

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