Zobrazeno 1 - 10
of 44
pro vyhledávání: '"I. N. Bubnov"'
Publikováno v:
Radio Physics and Radio Astronomy, Vol 28, Iss 3, Pp 183-200 (2023)
Subject and Purpose. This part of the paper continues presentation of results of the solar radio emission studies performed with Ukrainian radio telescopes over the past 20 years. The importance is stressed of developing adequate instruments and meth
Externí odkaz:
https://doaj.org/article/86cd3a85b6754a889d82dcc6f480457e
Publikováno v:
Radio Physics and Radio Astronomy, Vol 28, Iss 2, Pp 95-116 (2023)
Subject and Purpose. Results are presented of the solar corona investigations performed with the world famous Ukrainian radio telescopes. The work has been aimed at offering a consistent review of recent achievements in observations of a variety of l
Externí odkaz:
https://doaj.org/article/3dc2be47273e488bb1b30bdc8b823110
Autor:
I. N. Bubnov, O. O. Konovalenko, P. L. Tokarsky, O. M. Korolev, S. M. Yerin, L. O. Stanislavsky
Publikováno v:
Radio Physics and Radio Astronomy, Vol 26, Iss 3, Pp 197-210 (2021)
Purpose: Theoretical and experimental studies of the active antenna – an element of the low-frequency radio telescope antenna array for the future observatory on the farside of the Moon. Design/methodology/approach: To study the active antenna,
Externí odkaz:
https://doaj.org/article/a0930cbbed9b4839be0396e52eb32131
Publikováno v:
Radio Physics and Radio Astronomy, Vol 23, Iss 1, Pp 43-59 (2018)
Purpose: Theoretical and experimental investigations of noise temperature of a subarray being a part of the active phased array for the GURT – a low frequency radio telescope of new generation. Design/methodology/approach: A mathematical model o
Externí odkaz:
https://doaj.org/article/f059aacf2a1f4732a7442fc238efc273
Autor:
N. N. Kalinichenko, M. R. Olyak, O. O. Konovalenko, I. N. Bubnov, S. N. Yerin, A. I. Brazhenko, O. L. Ivantishin, O. A. Lytvynenko
Publikováno v:
Radio Physics and Radio Astronomy, Vol 22, Iss 1, Pp 45-52 (2017)
Purpose: Description of the solar wind investigation technique based on interplanetary scintillation observations of the decameter radio emission of space radio sources. Design/methodology/approach: The method is based on using the Feynman pass in
Externí odkaz:
https://doaj.org/article/fd1358c131ab43dfafef24dcc4832783
Publikováno v:
Radio Physics and Radio Astronomy, Vol 21, Iss 4, Pp 260-269 (2016)
Purpose: Making analysis of variations of fast and slow solarwind parameters at distances from the Sun of about 1 AU and more. Design/methodology/approach: The method of Feynman pathintegrals is applied to calculate the temporal spectra and disper
Externí odkaz:
https://doaj.org/article/353e52606f55460caf7921033d3c4abf
Publikováno v:
Radio Physics and Radio Astronomy, Vol 21, Iss 1, Pp 48-57 (2016)
Purpose: theoretical and experimental investigations of sensitivity by the signal-to-noise ratio criterion active antenna used as a phased array element of the GURT radio telescope of new generation. Design/methodology/approach: A mathematical mod
Externí odkaz:
https://doaj.org/article/20bb080cb4f54bcba1041fe27d66a1d3
Autor:
S. N. Yerin, P. L. Tokarsky, A. A. Gridin, I. N. Bubnov, A. A. Konovalenko, I. S. Falkovich, A. P. Reznik
Publikováno v:
Radio Physics and Radio Astronomy, Vol 19, Iss 3, Pp 240-248 (2014)
A beamforming device for a 5×5-element subarray of receiving phased antenna array of new GURT radio telescope designed to operate within 10 − 70 MHz is presented. The device is composed of six identical units. Each unit contains equal-arm 5:1 comb
Externí odkaz:
https://doaj.org/article/f215e4a13f254dbf9ef5e35846274fb0
Autor:
I. N. Bubnov, A. A. Konovalenko, A. A. Stanislavsky, V. P. Bovkoon, I. N. Zhouck, D. V. Mukha
Publikováno v:
Radio Physics and Radio Astronomy, Vol 19, Iss 2, Pp 111-119 (2014)
The results of radio emission observations for Cassiopeia A source at frequencies 35, 38, 40, 45, 50, 55, 60 and 65 MHz are presented. At these frequencies, the radio-emission flux density ratio between Cassiopeia A and Cygnus A for the epoch of 2014
Externí odkaz:
https://doaj.org/article/414dc309a29843e7833de1f9ea53f172
Autor:
A. A. Stanislavsky, I. N. Bubnov, A. A. Konovalenko, A. A. Gridin, V. V. Shevchenko, L. A. Stanislavsky, D. V. Mukha, A. A. Koval
Publikováno v:
Advances in Astronomy, Vol 2014 (2014)
We present the 25-element active antenna array and its remote control in the framework of the GURT project, the Ukrainian Radio Telescope of a new age. To implement beamforming, the array is phased with the help of discrete cable delay lines in analo
Externí odkaz:
https://doaj.org/article/7ed3a4fef6824d30b7a6c7fdfbbb43c6