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  Subjects -> ELECTRONICS (Total: 156 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 6)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 2)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 26)
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 227)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
Annals of Telecommunications     Hybrid Journal   (Followers: 7)
Archives of Electrical Engineering     Open Access   (Followers: 12)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 32)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access  
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 42)
China Communications     Full-text available via subscription   (Followers: 7)
Circuits and Systems     Open Access   (Followers: 16)
Consumer Electronics Times     Open Access   (Followers: 6)
Control Systems     Hybrid Journal   (Followers: 187)
Edu Elektrika Journal     Open Access  
Electronic Design     Partially Free   (Followers: 80)
Electronic Markets     Hybrid Journal   (Followers: 8)
Electronic Materials Letters     Hybrid Journal   (Followers: 2)
Electronics     Open Access   (Followers: 62)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 8)
Electronics For You     Partially Free   (Followers: 65)
Electronics Letters     Hybrid Journal   (Followers: 26)
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 41)
Energy Harvesting and Systems : Materials, Mechanisms, Circuits and Storage     Hybrid Journal   (Followers: 3)
Energy Storage Materials     Full-text available via subscription   (Followers: 1)
EPJ Quantum Technology     Open Access  
EURASIP Journal on Embedded Systems     Open Access   (Followers: 12)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 7)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 156)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 3)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 80)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 67)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 35)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 52)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 58)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 52)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 17)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 35)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 16)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 27)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 59)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 8)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 15)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 7)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 31)
IET Power Electronics     Hybrid Journal   (Followers: 31)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 11)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access  
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 41)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription  
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 8)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 8)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 4)
International Journal of Computer & Electronics Research     Full-text available via subscription   (Followers: 2)
International Journal of Control     Hybrid Journal   (Followers: 13)
International Journal of Electronics     Hybrid Journal   (Followers: 6)
International Journal of Electronics & Data Communication     Open Access   (Followers: 11)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 10)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 7)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 3)
International Journal of Power Electronics     Hybrid Journal   (Followers: 16)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 7)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Journal on Communication     Full-text available via subscription   (Followers: 13)
International Journal on Electrical and Power Engineering     Full-text available via subscription   (Followers: 8)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 9)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 19)
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 6)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 2)
Journal of Guidance, Control, and Dynamics     Full-text available via subscription   (Followers: 139)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 7)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 9)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 2)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 31)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 9)
Journal of Semiconductors     Full-text available via subscription   (Followers: 4)
Journal of Sensors     Open Access   (Followers: 23)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal Rekayasa Elektrika     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 14)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 4)
Microelectronics and Solid State Electronics     Open Access   (Followers: 16)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 31)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 14)
Paladyn, Journal of Behavioral Robotics     Open Access   (Followers: 1)
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Patents on Electrical & Electronic Engineering     Full-text available via subscription   (Followers: 9)
Recent Patents on Telecommunications     Full-text available via subscription   (Followers: 2)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Security and Communication Networks     Hybrid Journal   (Followers: 3)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 51)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 70)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 12)
Solid-State Electronics     Hybrid Journal   (Followers: 8)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 8)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access  
Wireless and Mobile Technologies     Open Access   (Followers: 5)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 13)
Електротехніка і Електромеханіка     Open Access  

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Journal Cover Radiophysics and Quantum Electronics
  [SJR: 0.336]   [H-I: 11]   [2 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1573-9120 - ISSN (Online) 0033-8443
   Published by Springer-Verlag Homepage  [2352 journals]
  • Probabilities of Bremsstrahlung Emission of Photons at Low-Energy
           Electron-Nuclear Collisions in a Magnetic Field
    • Authors: S. A. Koryagin; I. A. Balandin
      Pages: 171 - 185
      Abstract: We consider quantum-mechanical probabilities of bremsstrahlung of photons in the case of low-energy Coulomb collisions in a magnetic field, where the scattering center so perturbs the state of the incident electron that the motion of the latter becomes quasi-bound. Quantum formulas for the spectral power of bremsstrahlung radiation are obtained from the classical formulas by replacing the Fourier amplitudes of the particle velocity with matrix elements of the velocity operator for wave functions, which are normalized by the condition of a unit flux being incident on the nucleus (or an equivalent outgoing flux), with summation over finite Landau levels and quantized values of the impact parameter. Equivalent forms of the specified matrix elements, which are expressed in terms of the Coulomb field and annihilation/creation operators for the eigenfunctions of the operator of the squared impact parameter, are presented. The obtained presentations for the spectral power of bremsstrahlung radiation in the case of quasi-bound electron motion allow one to translate the results of calculating this value in the classical limit to the quantum case, which is typical of white dwarfs with the strongest magnetic fields.
      PubDate: 2017-08-01
      DOI: 10.1007/s11141-017-9788-9
      Issue No: Vol. 60, No. 3 (2017)
       
  • Biomedical Optoacoustic Tomograph Based on a Cylindrical Focusing PVDF
           Antenna
    • Authors: P.V. Subochev; A. S. Postnikova; A.V. Koval’chuk; I. V. Turchin
      Pages: 233 - 239
      Abstract: We developed an optoacoustic tomograph with hand-held probe designed for optoacoustic imaging of biological tissues. The hand-held probe consists of a fiber-optic bundle for delivery of pulsed laser radiation to the studied object and a cylindrical focusing 64-element antenna for the detection of optoacoustic pulses. The capabilities of the tomograph to visualize the model blood vessels were studied experimentally using electronic and electronic–mechanical scanning. The achieved axial/lateral spatial resolution is 200/400 μm, the imaging depth is 18 mm, and the maximum B-scan acquisition rate is 10 Hz.
      PubDate: 2017-08-01
      DOI: 10.1007/s11141-017-9794-y
      Issue No: Vol. 60, No. 3 (2017)
       
  • Estimation of the Duration of a Rectangular Optical Pulse in the Case of
           Unknown Pulse and Background Intensities
    • Authors: A.P. Trifonov; A.A. Milogorodskii
      Pages: 240 - 251
      Abstract: We synthesize and analyze the quasilikelihood and maximum-likelihood algorithms for estimating the pulse duration. The estimation-accuracy loss because of the a priori unknown pulse and background intensities is found.
      PubDate: 2017-08-01
      DOI: 10.1007/s11141-017-9795-x
      Issue No: Vol. 60, No. 3 (2017)
       
  • Speech-Message Extraction from Interference Introduced by External
           Distributed Sources
    • Authors: V. A. Kanakov; N. A. Mironov
      Pages: 252 - 257
      Abstract: The problem of this study involves the extraction of a speech signal originating from a certain spatial point and calculation of the intelligibility of the extracted voice message. It is solved by the method of decreasing the influence of interference from the speech-message sources on the extracted signal. This method is based on introducing the time delays, which depend on the spatial coordinates, to the recording channels. Audio records of the voices of eight different people were used as test objects during the studies. It is proved that an increase in the number of microphones improves intelligibility of the speech message which is extracted from interference.
      PubDate: 2017-08-01
      DOI: 10.1007/s11141-017-9796-9
      Issue No: Vol. 60, No. 3 (2017)
       
  • Comparison of Radiophysical and Optical Infrared Ground-Based Methods for
           Measuring Integrated Content of Atmospheric Water Vapor in Atmosphere
    • Authors: D. V. Ionov; V. V. Kalinnikov; Yu. M. Timofeyev; N. A. Zaitsev; Y. A. Virolainen; V. S. Kostsov; A. V. Poberovskii
      Abstract: By virtue of their all-weather capabilities, the radiophysical atmospheric sensing methods allow one, in particular, to perform continuous observations of variations in the atmospheric content of water vapor being the most important natural greenhouse gas. The measurement station of St. Petersburg State University at Peterhof (59.88° N, 29.83° E) runs a number of ground-based instruments to determine total water-vapor content (TWVC) in the atmosphere. During a year period from September 2014 to September 2015, the TWVC was synchronously measured by two radiophysical methods, namely, the microwave and radio-refraction techniques, as well as the optical infrared method. Comparisons show that the average systematic and random discrepancies among the three methods amount to 0.3–0.5 kg/m2 (3–7%) and 0.4–0.6 kg/m2 (8–11%), respectively. The maximum relative differences (up to 20%) among the results of different-type measurements are observed for very small TWVC values (below 5 kg/m2). Empirical estimates of the random errors of the methods were 0.5, 0.3, and 0.3 kg/m2 for the radio-refraction, microwave, and infrared methods, respectively. The results of the TWVC measuring by the radio-refraction and microwave methods are in good agreement and yield greater values than those obtained by the optical method. The obtained discrepancies in the TWVC estimates are small compared with the published results of similar comparisons, which can, in particular, be attributed to the high spatiotemporal matching of various measurements.
      PubDate: 2017-10-10
      DOI: 10.1007/s11141-017-9800-4
       
  • Characteristics of the Energy-Like Detector of a Gaussian Signal Against
           the Background of Likhter Noise
    • Authors: V. I. Kostylev; I. P. Gres’
      Abstract: We propose an energy-like detector of signals and analyze its efficiency by an example of detecting a Gaussian signal with zero mathematical expectation and uncorrelated readouts against the background of Likhter noise with independent readouts. Analytical expressions for the probability of correct detection are obtained and statistical simulation is performed. Using particular examples, we show that the energy-like detection characteristics can be much closer to the optimal ones than those of the energy detection.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9804-0
       
  • Properties of the Circumsolar Plasma Turbulence and Plasma Waves According
           to the Coronal Sounding Experiments Using Spacecraft Signals
    • Authors: O. I. Yakovlev
      Abstract: We report on the results of studying the circumsolar plasma turbulence according to the coronal sounding experiments using spacecraft signals. Statistical characteristics of the temporal fluctuation spectra of the amplitude, phase, frequency, and Faraday rotation angle of the radio-wave polarization plane are described for the solar offset distances of the ray path in the range between 3 and 40 solar radii. Information on the turbulence spectra is given and the spectral index, as well as the outer and inner turbulence scales, as functions of the heliocentric distance are presented. The effect on the measured parameters of the plasma waves is discussed and typical values of the wave periods for different distances from the Sun are given.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9797-8
       
  • Backscattering Effects in Media with Strongly Elongated Scattering
           Indicatrices
    • Authors: Yu. A. Ilyushin
      Abstract: We consider the weak localization and the backscattering halo in media with strongly elongated scattering indicatrices. The earlier theory is generalized to the case of a nonuniform backscattering cross section in the rear hemisphere. Asymptotic formulas for the backscattering intensities are obtained in the low-angle diffusion approximation.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9802-2
       
  • Excitation of Artificial Ionospheric Turbulence in the High-Latitude
           Ionospheric F Region as a Function of the Eiscat/Heating Effective
           Radiated Power
    • Authors: T. D. Borisova; N. F. Blagoveshchenskaya; T. K. Yeoman; I. Häggström
      Abstract: We present the results of experimental studies of the parameters of HF-enhanced ion–acoustic and Langmuir plasma waves, as well as small-scale artificial field-aligned irregularities (AFAIs) when the EISCAT/Heating effective radiated power is varied from 10 to 560 MW. In the course of the experiments, a high-power HF radio wave with the alternating ordinary (O-mode) and extraordinary (X-mode) polarizations was radiated towards the magnetic zenith at a frequency of 7.953 MHz lying below the cutoff frequency of the F2 layer. A fundamental difference in the development of artificial ion–acoustic and Langmuir turbulence, which is seen as HF-enhanced ion and plasma lines in the EISCAT spectra, under the O- and X-mode HF pumping was found. The minimum values of the HF pump-wave electric fields in the ionosphere when the HF-enhanced ion and plasma lines, as well as small-scale artificial field-aligned irregularities, start to be excited, were determined from experimental data both for the O- and X-mode HF pumping. Comparison between the experimental and theoretical threshold values of the electric field required for the excitation of artificial ionospheric turbulence in thermal, Langmuir, and ion–acoustic modes in the high-latitude ionospheric F2 layer for the O-mode HF pump wave was made.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9798-7
       
  • Studying the Bridge-Type Parametric Scatterer
    • Authors: N.Yu. Babanov; A. V. Klyuev; S.V. Lartsov; V.P. Samarin
      Abstract: We study a parametric scatterer representing a quadripole of four bridge-type parametric circuits with antennas connected to the circuit arms and tuned to the pump signal and its half-wave subharmonic on the basis of simulation and full-scale experiments in the frequency range near 800 MHz.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9803-1
       
  • Determining the Tropospheric Delay of a Radio Signal by the Radiometric
           Method
    • Authors: G. N. Ilyin; A. V. Troitsky
      Abstract: We present a method and algorithm for real-time determination of the tropospheric delay of a radio signal and the radiometric complex developed on their basis. The method is based on the measurement of the atmospheric thermal microwave radiation intensity at the frequencies ν 1 = 20.7 GHz, ν 2 = 32 GHz, and ν 3 = 56.7 GHz and solution of the corresponding inverse problem with respect to the atmospheric parameters (temperature, pressure, humidity, and water content) which completely determine the tropospheric delay of a radio signal. The method was experimentally tested by comparing the radio-signal delay series obtained by the radiometric method and the GLONASS/GPS data. The error of determining the wet component of the radio-signal delay was about 3 mm.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9799-6
       
  • Simulation of a Random Profile of the Sea Surface
    • Authors: V. L. Weber
      Abstract: We consider the problem of simulation of the slope field of a random surface profile, which is represented as a sum of a finite number of sinusoids with random phases. The behavior of the correlation function of the slopes is studied for equidistant and nonequidistant locations of the nodes of the model-field spectrum on the frequency axis. A new node-location method, which is based on the equalization of the amplitudes of the spectral components of the actual slope field and ensures maximum proximity of the correlation functions of the model and actual fields over the entire region of their definition, is proposed. Using this method, one can significantly reduce the number of the summed harmonics during the simulation of the sea wind waves. The problem of fluctuations of the above-water irradiance is studied using the proposed slope-simulation method and, as a result, its application efficiency is proved.
      PubDate: 2017-10-09
      DOI: 10.1007/s11141-017-9801-3
       
  • Wideband Low-Reflection Inhomogeneous Dielectric Structures
    • Authors: N. A. Denisova; A. V. Rezvov
      Abstract: We consider reflection of electromagnetic waves from two-layer dielectric films with finite thickness, whose refractive indices vary in the direction of wave propagation, which is perpendicular to the substrate boundary. The profiles of the refractive indices of the structures having low reflection coefficients in a wide frequency range are found. The obtained results are based on exact analytical solutions of the Helmholtz equation for one type of the layered inhomogeneous dielectric medium. The possibility of creating new low-reflection wideband inhomogeneous dielectric structures is demonstrated.
      PubDate: 2017-09-14
      DOI: 10.1007/s11141-017-9793-z
       
  • Remote Sensing of the Snow cover in the millimeter-Wavelength Range
    • Authors: A. A. Shvetsov; M. V. Belikovich; O. S. Bol’shakov; V. G. Ryskin; F. M. Feigin; L. I. Fedoseev; A. Korabovsky; A. V. Averchenko
      Abstract: We present the results of development of a multifrequency method for passive remote sensing of the snow cover using spectral features of the downward atmospheric radiation in the millimeter-wavelength range. A description of the automated tri-band spectroradiometer realizing this method is provided. Preliminary results of test measurements of the snow cover parameters by means of the tri-band spectroradiometer are discussed.
      PubDate: 2017-09-14
      DOI: 10.1007/s11141-017-9791-1
       
  • Determination of Variations in the Moving-Object Azimuth by the Phase
           Method with Fixed Antennas
    • Authors: A.V. Shchekoldin; I.V. Zhuravlev
      Abstract: We solve the problem of the high-accuracy measurement of the moving-object azimuth by the phase method using fixed antennas. The algorithm is presented for eliminating the ambiguity when calculating the azimuth variation by this method in the case where the object is detected in the region of unambiguous azimuth determination by a radar system. The experimental results of the azimuth measurements are presented.
      PubDate: 2017-09-14
      DOI: 10.1007/s11141-017-9792-0
       
  • Effect of Solar Flares on the Schumann-Resonance Frequences
    • Authors: A. V. Shvets; A. P. Nickolaenko; V. N. Chebrov
      Abstract: We present the results of analyzing the response of the Schumann-resonance frequencies to the Xray solar flares. A special technique, by which a sharp variation that is present in all the resonant modes, but is hidden by regular variations combined with stochastic fluctuations is singled out using the weighted average frequency, has been developed. On the basis of comparison of the response shape and the flare intensity, the parameters of the statistical relationship between the frequency variations and the X-ray radiation intensity were analyzed and determined for the nonlinear regression model. It has been shown that an increase in the resonant frequency is proportional on the average to the logarithm of the X-ray radiation intensity to the power of 1.7. The magnitude of changes in the cavity frequency is related with the corresponding changes in the characteristic “magnetic” height of the conductivity profile of the lower ionosphere and compared with the results of the independent analysis performed by measuring VLF radio signals.
      PubDate: 2017-09-14
      DOI: 10.1007/s11141-017-9789-8
       
  • Estimation of the Tropospheric Wet Delay of Radio waves Based on a Model
           and Microwave Radiometry Data
    • Authors: I. A. Gotyur; D. M. Karavaev; V.M. Krasnov; Y.V. Kuleshov; A.B. Lebedev; A. N. Meshkov; G. G. Shchukin
      Abstract: By combining the global atmospheric model NRLMSISE-00 and the humidity model of the Northern hemisphere (GOST 26352-84), we developed a model for calculation of the dielectric permittivity of the atmosphere along the radio-wave propagation path. Microwave radiometry data were used to test the model. The difference between the model and measured values of the zenith wet delay of radio waves in the troposphere averaged 1–3 cm for a r.m.s. deviation of 4.7–5.3 cm.
      PubDate: 2017-09-14
      DOI: 10.1007/s11141-017-9790-2
       
  • Measurement of the Radial Velocity of a Moving Object Under Nonlinear
           Variation in the Doppler Phase
    • Authors: A. V. Shchekoldin; I. V. Zhuravlev
      Abstract: We solve the problem of measuring the radial velocity of a moving object under nonlinear variation in the Doppler phase with respect to time. The algorithm for measuring this velocity with high accuracy, which allows one to coherently accumulate the signal to improve the signal-to-noise ratio, is described. Compared with the existing analogs, the developed algorithm makes it possible to reduce the amount of calculations.
      PubDate: 2017-09-01
      DOI: 10.1007/s11141-017-9786-y
       
  • Glow of the Plasma of a Pulse Discharge Produced in Nitrogen by High-Power
           Terahertz-Wave Radiation
    • Authors: A. V. Vodopyanov; M. Yu. Glyavin; A. G. Luchinin; S. V. Razin; A. V. Sidorov; A. P. Fokin
      Abstract: We studied the glow of the plasma of a pulse discharge ignited in nitrogen by high-power focused radiation of a terahertz-wave gyrotron (a radiation frequency of 0.67 GHz, a pulse duration of 20 μs, and a power of 40 kW). The pressure in the discharge chamber varied in the range 0.1–350 Torr. It was found that at high pressures (more than 50 Torr), long-term (about 1.0–1.5 ms), a non-monotonic afterglow exists after the end of the terahertz pulse, whose intensity can exceed the plasma glow intensity significantly (by several times) during the action of the terahertz radiation pulse on the plasma. At pressures below 50 Torr, the afterglow duration proves to be significantly shorter, specifically, about several tens of microseconds. The observed long-term afterglow is radiation in certain vibrational bands of the second positive system of N2 and is due, evidently, to the processes of associative excitation of electron levels in nitrogen molecules with the participation of long-living metastables \( {\mathrm{N}}_2\left({\mathrm{A}}^3{\varSigma}_{\mathrm{u}}^{+}\right) \) .
      PubDate: 2017-09-01
      DOI: 10.1007/s11141-017-9784-0
       
  • Plasmon Resonances in an Elliptical Gold Cylinder
    • Authors: D. V. Aleksandrov; A. P. Anyutin; I. P. Korshunov; A. D. Shatrov
      Abstract: We study plasmon resonances, which arise in the two-dimensional problem of diffraction of a plane wave on a gold cylinder with an elliptical shape of the transverse cross section. Numerical and asymptotical methods are used to find scattering and absorption spectra in the visible range. A simple analytical solution of the problem is found for a cylinder with an elongated shape of the transverse cross section. It is shown that in the case of normal incidence of a plane wave, a single quasistatic plasmon resonance is excited in such a cylinder.
      PubDate: 2017-09-01
      DOI: 10.1007/s11141-017-9782-2
       
 
 
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