Results 11 to 20 of about 2,143 (164)

Design, Implementation, and Characterization of a Signal Acquisition Chain for SADino: The Precursor of the Italian Low-Frequency Telescope Named the Sardinia Aperture Array Demonstrator (SAAD)

Sensors, 2023
Low-frequency aperture arrays represent sensitive instruments to detect signals from radio astronomic sources situated in the universe. In Italy, the Sardinia Aperture Array Demonstrator (SAAD) consists of an ongoing project of the Italian National ...
Adelaide Ladu, Luca Schirru, Mauro Pili, Gian Paolo Vargiu, Francesco Gaudiomonte, Federico Perini, Andrea Melis, Raimondo Concu, Matteo Murgia   +8 more
doaj   +1 more source

THE CRITICAL FREQUENCY OF THE IONOSPHERIC F2-LAYER AS OBTAINED FROM IONOSONDE DATA AND OBSERVATIONS OF SOLAR RADIO BURSTS [PDF]

Radio Physics and Radio Astronomy, 2022
Subject and Purpose. Studying the time variations shown by the critical frequencies of the ionospheric F2 layer through comparative analysis of ionosonde data and observations of type III solar radio bursts. Methods and Methodology.
L. O. Stanislavsky, I. M. Bubnov, S. M. Yerin, A. V. Zalizovski , V. M. Lisachenko   +4 more
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STUDIES OF PULSAR RADIO EMISSION WITH THE GURT RADIO TELESCOPE SUBARRAY [PDF]

Radio Physics and Radio Astronomy, 2018
Purpose: Finding the possibility of pulsar radio emission studies in the meter wavelength range with a small-sized subarray of the low-frequency GURT radio telescope of new generation. Development of the joint pulsar radio emission observations technique
V. V. Zakharenko, O. O. Konovalenko, S. M. Yerin, I. M. Bubnov, I. Y. Vasylieva, O. M. Ulyanov, V. Y. Yatsyna   +6 more
doaj   +1 more source

Low Frequency Radio Astronomy from the Moon [PDF]

Highlights of Astronomy, 1998
AbstractThe radio sky at frequencies of several MHz and below is essentially unexplored with high angular resolution due to refraction and opacity in the Earth’s ionosphere. An interferometer array in space providing arcminute resolution images would allow a wide range of problems in solar, planetary, galactic, and extragalactic astronomy to be ...
D.L. Jones, K.W. Weiler
openaire   +1 more source

Inexpensive Interferometer for Low Frequency Radio Astronomy [PDF]

Journal of Communication and Information Systems, 2012
Un réseau interférométrique similaire à la station prototype de réseau basse fréquence (LOFAR) (LOPES) et au réseau transitoire de huit mètres de longueur d'onde (ETA) est en cours de développement pour couvrir la gamme de fréquences LOFAR inférieure à 100 MHz à l'Observatoire spatial austral (SSO) (29,4 • S, 53,8 • W, 480 m. a. s.
Guilherme S. Rosa, Nelson Jorge Schuch, Natanael Rodrigues Gomes, J.R. Bergmann, E. Echer, Renato Machado   +5 more
openaire   +1 more source

CREATION AND APPROBATION OF A LOW-FREQUENCY RADIO ASTRONOMY ANTENNA FOR STUDIES OF OBJECTS OF THE UNIVERSE FROM THE MOON'S FARSIDE [PDF]

Radio Physics and Radio Astronomy, 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.
I. N. Bubnov, O. O. Konovalenko, P. L. Tokarsky, O. M. Korolev, S. M. Yerin, L. O. Stanislavsky   +5 more
doaj   +1 more source

Revisiting Hybrid Interferometry With Low-Frequency Radio Astronomy Arrays [PDF]

IEEE Transactions on Antennas and Propagation, 2017
Radio interferometry most commonly involves antennas or antenna arrays of identical design. The identical antenna assumption leads to a convenient and useful mathematical simplification resulting in a scalar problem. An interesting variant to this is a "hybrid" interferometer involving two designs.
Adrian T. Sutinjo, Daniel C. X. Ung, Tim M. Colegate, Randall B. Wayth, Peter J. Hall, Eloy de Lera Acedo   +5 more
openaire   +3 more sources

Low Frequency Planetary Radio Astronomy [PDF]

Symposium - International Astronomical Union, 2002
This paper reviews planetary radio astronomy at low frequencies. At least at frequencies observable from the Earth's surface, this field has been almost solely the study of Jovian magnetospheric emissions. With the discovery of extra-solar planets, and the potential for new telescopes with large collecting areas, we may well see more objects and ...
openaire   +1 more source

INTERSTELLAR MEDIUM AND DECAMETER RADIO SPECTROSCOPY [PDF]

Radio Physics and Radio Astronomy, 2021
Purpose: The analytical review of the main results of research in the new direction of the low-frequency radio astronomy, the interstellar medium radio spectroscopy at decameter waves, which had led to astrophysical discovery, recording of the radio ...
S. V. Stepkin, O. O. Konovalenko, Y. V. Vasylkivskyi, D. V. Mukha   +3 more
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THE UNIVERSE RADIO EMISSION AT DECAMETER WAVELENGTHS (by the materials of a series of works awarded by the State Prize of Ukraine in the field of science and technology in 2018)

Radio Physics and Radio Astronomy, 2019
Purpose: The abstract presentation and review of the works of the last 40 years in the field of low-frequency radio astronomy and a summary of their main scientific and technical results, which have been awarded the State Prize of Ukraine in the field of
O. O. Konovalenko, V. V. Zakharenko, M. M. Kalinichenko, V. M. Melnik, M. A. Sidorchuk, A. A. Stanislavsky, S. V. Stepkin, O. M. Ulyanov   +7 more
doaj   +1 more source