2012 Issue №4

The equivalent circuit is developed to describe the electrical processes in the receiver path of the leaky wave antenna. The line has the slot-type radiator which is considered as a resistive-capacitive non-uniformity. The slot in the waveguide wall is considered as non-uniformity of resistivecapacitive type. The system of equations is composed and solved to investigate the balance of power in the receiver path and found the electrical parameters of the scheme.

This paper presents the results of observations of the dynamics of groundlevel aerosol made using two-wavelength (532, 1064 nm) atmospheric lidar (LSA-2S). The observations were made in December 2011 — January 2012 in the morning (8—10 h LT) in order to study the dynamics of aerosol during of the solar terminator period. In the observations revealed that appear aerosol characteristics oscillations with periods of 15—20 min during the period of the solar terminator. It is assumed that these oscillations can be caused by the excitation of internal gravity waves in the solar terminator.

The technique of an estimation of parameters of a dual-beam ionospheric signal is presented by a method of the maximum credibility. Results of modeling calculations and results of calculations of real ionospheric signals on line Moscow — Kaliningrad are resulted.

It is shown that unsteadiness parameters of components of the ionospheric signal leads to multiplicative noise. It largely affects the reliable data when receiving ionospheric signals. The estimation of the variance of the amplitudes for the reception of ionospheric signals with multiplicative noise. The results of studying the effectiveness of the methods of Doppler filtering when  receiving ionospheric signals.

The noise nature of discharge current oscillations of the stationary plasma thruster has been revealed. The maximal level of generated low-frequency conducted interferences in all the modes of the electro-dynamic thrust module simulator operation has been determined.

The equivalent circuit is developed to describe the electrical processes in the antenna of leaky wave. The slot of an arbitrary length in the waveguide wall is considered as non-uniformity of resistive-capacitive type with distributed parameters. The calculations are performed to determine the optimal values of the antenna parameters.

The method for analyzing the oscillator with the circuit between collector and base is suggested. It based on graphic solution the generator equation and allow us to make realaized choise of electric scheme parameters to achieve the required oscillator characteristics.

The model of multichannel system of the transfer, realizing a feedback, by the introduction of an additional package of impulses supervising reception of the information by corresponding station is developed.

The possibility of application of the newly developed multi-channel hybrid atmospheric optical communication system, which allows to increase the capacity, performance, reliability and efficiency of the communication channel. A well constructed simulations of the developed system.

This paper presents the results of a series of experiments whose purpose was to investigate the possible use of composite pulses to improve the homogeneity of the magnetic field and study the possibility of identifying compounds based on the relaxation characteristics of the NMR signals.