The variability of discrete sources in the decameter wavelength range

S. Ya. Braude; I. N. Zhuk; O. M. Lebedeva; A. V. Men; B. P. Ryabov

doi:10.1007/bf01031019

Time and Polarization Radiation Characteristics of PSR J0242+6256 at the Decameter Wavelength Range

Kinematics and Physics of Celestial Bodies ◽

10.3103/s0884591318040062 ◽

2018 ◽

Vol 34 (4) ◽

pp. 174-183 ◽

Cited By ~ 1

Author(s):

O. M. Ulyanov ◽

A. I. Shevtsova ◽

V. V. Zakharenko ◽

A. O. Skoryk ◽

I. Y. Vasylieva ◽

...

Keyword(s):

Wavelength Range ◽

Radiation Characteristics ◽

Decameter Wavelength

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Single-Station Location of Radio Emission Sources in the Decameter Wavelength Range Using a Wide-Aperture Direction Finder and a Chirp Ionosonde–Radio Direction Finder

Radiophysics and Quantum Electronics ◽

10.1007/s11141-018-9861-z ◽

2018 ◽

Vol 60 (12) ◽

pp. 960-977 ◽

Cited By ~ 1

Author(s):

G. G. Vertogradov ◽

V. P. Uryadov ◽

E. G. Chaika ◽

V. A. Valov ◽

F. I. Vybornov ◽

...

Keyword(s):

Radio Emission ◽

Wavelength Range ◽

Emission Sources ◽

Wide Aperture ◽

Direction Finder ◽

Decameter Wavelength ◽

Single Station ◽

Station Location

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INVESTIGATIONS OF COSMIC SOURCES RADIOEMISSION SCINTILLATIONS DUE TO INTERPLANETARY PLASMA IRREGULARITIES AT THE INSTITUTE OF RADIO ASTRONOMY, NAS UKRAINE

Radio physics and radio astronomy ◽

10.15407/rpra26.02.148 ◽

2021 ◽

Vol 26 (2) ◽

pp. 148-164

Author(s):

M. M. Kalinichenko ◽

◽

N. V. Kuhai ◽

O. O. Konovalenko ◽

A. I. Brazhenko ◽

...

Keyword(s):

Solar Wind ◽

Wavelength Range ◽

Radio Astronomy ◽

Low Frequency ◽

Think Tank ◽

National Academy Of Sciences ◽

Plasma Irregularities ◽

Decameter Wavelength ◽

Interplanetary Plasma ◽

Interplanetary Scintillations

Purpose: Review of investigations of cosmic sources radioemission scintillations due to interplanetary plasma irregularities made at the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, from the first observations in the mid-70s until now. Design/methodology/approach: In the course of preparation of this paper, the authors have reviewed, analyzed and summarized the information being published in the home and foreign publications, and reported at scientific conferences. Findings: The investigations of the interplanetary scintillations carried out at the Institute of Radio Astronomy, NAS Ukraine have been reviewed. A retrospective discussion has been made on how in the course of these researches the knowledge about the basic parameters of interplanetary scintillations in the decameter wavelength range, as well as that on the important parameters of the solar wind and its structure, have been obtained. Also, various methods of processing and analysis of experimental data were offered, and new means for receiving cosmic radiation were created. The place and importance of the discussed researches for the world science are shown. Conclusions: Over the years since the beginning of the research, the think tank of the Department of Low-Frequency Radio Astronomy of the Institute of Radio Astronomy, NAS Ukraine has obtained a number of new relevant results, which bring Ukraine into the cohort of world centers of interplanetary scintillation researches. The construction of a new GURT radio telescope, among other things, creates new prospects for the development of this relevant line of investigation. Key words: interplanetary scintillations; decameter wavelength range; solar wind; solar wind stream structure; coronal mass ejection

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Application of pyrometer and standard sample to determine surface temperature of studied materials

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2019-12-9-13 ◽

2019 ◽

pp. 9-13

Author(s):

V.Ya. Mendeleyev ◽

V.A. Petrov ◽

A.V. Yashin ◽

A.I. Vangonen ◽

O.K. Taganov

Keyword(s):

Composite Material ◽

Surface Temperature ◽

Relative Error ◽

Wavelength Range ◽

Standard Sample ◽

A Priori ◽

Temperature Changes ◽

Surface Temperatures ◽

Relative Errors ◽

Normal Emissivity

Determining the surface temperature of materials with unknown emissivity is studied. A method for determining the surface temperature using a standard sample of average spectral normal emissivity in the wavelength range of 1,65–1,80 μm and an industrially produced Metis M322 pyrometer operating in the same wavelength range. The surface temperature of studied samples of the composite material and platinum was determined experimentally from the temperature of a standard sample located on the studied surfaces. The relative error in determining the surface temperature of the studied materials, introduced by the proposed method, was calculated taking into account the temperatures of the platinum and the composite material, determined from the temperature of the standard sample located on the studied surfaces, and from the temperature of the studied surfaces in the absence of the standard sample. The relative errors thus obtained did not exceed 1,7 % for the composite material and 0,5% for the platinum at surface temperatures of about 973 K. It was also found that: the inaccuracy of a priori data on the emissivity of the standard sample in the range (–0,01; 0,01) relative to the average emissivity increases the relative error in determining the temperature of the composite material by 0,68 %, and the installation of a standard sample on the studied materials leads to temperature changes on the periphery of the surface not exceeding 0,47 % for composite material and 0,05 % for platinum.

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Results of Spatial Structure of Atmosphere Radiation in a Spectral Range (1.5–2) µm Research

Light & Engineering ◽

10.33383/2017-061 ◽

2018 ◽

pp. 7-13

Author(s):

Anton M. Mishchenko ◽

Sergei S. Rachkovsky ◽

Vladimir A. Smolin ◽

Igor V . Yakimenko

Keyword(s):

Spatial Structure ◽

Unmanned Aerial Vehicle ◽

Wavelength Range ◽

Spectral Range ◽

Near Ir ◽

Optoelectronic Systems ◽

Aerial Vehicle

Results of experimental studying radiation spatial structure of atmosphere background nonuniformities and of an unmanned aerial vehicle being the detection object are presented. The question on a possibility of its detection using optoelectronic systems against the background of a cloudy field in the near IR wavelength range is also considered.

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