Results 21 to 30 of about 74,044 (308)

Performance of the Sardinia Radio Telescope Using the Dual-Polarized Cryogenic C-Low Receiver in the 4.2–5.6 GHz Frequency Band [PDF]

Sensors
The Sardinia Radio Telescope (SRT) is an Italian antenna utilized for scientific research in the field of radio astronomy across a broad frequency range from 300 MHz to 116 GHz. Among the various cryogenic receivers installed on SRT, the dual-polarized C-
Luca Schirru, Elise Egron, Adelaide Ladu, Francesco Gaudiomonte, Alessandro Attoli, Alessandro Cabras, Giuseppe Carboni, Francesca Loi, Paolo Marchegiani, Marco Marongiu, Sara Mulas, Matteo Murgia, Mauro Pili, Alberto Pellizzoni, Sergio Poppi, Fabio Schirru, Valentina Vacca   +16 more
doaj   +2 more sources

Square Kilometre Array Enhancement: A Convex Programming Approach to Optimize SKA-Low Stations in the Case of Perturbed Vogel Layout [PDF]

Sensors
This study presents a convex optimization framework for beam synthesis in Square Kilometre Array low-frequency radio telescope stations configured in a sunflower-like layout.
Giada Maria Battaglia, Giuseppe Caruso, Pietro Bolli, Roberta Palmeri, Andrea Francesco Morabito   +4 more
doaj   +2 more sources

The history of early low frequency radio astronomy in Australia. 12: reber, higgins and the mooted all-sky survey with the shain cross

Journal of Astronomical History and Heritage
During the 1950s and 1960s, Australia was a world leader in the specialised field of low frequency radio astronomy, with two geographically distinct areas of activity.
Wendt, Harry, George, Martin, Orchiston, Wayne   +2 more
core   +2 more sources

Can We Improve on the Dipole Antenna for Space-based Low Frequency Radio Astronomy?

2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), 2021
This paper presents an analysis of the shortcomings of dipoles in space-based low frequency radio astronomy. It is at these frequencies that it is expected to uncover more information about the beginning of the universe, the Dark Ages.
C.J.C. Vertegaal, Vertegaal, C.J.C.; id_orcid, H.R. Pourshaghaghi, Vertegaal, C.J.C., M.J. Bentum, Pourshaghaghi, H.R., Bentum, M.J.   +6 more
core   +2 more sources

Design of an Ultra Low Frequency CubeSat Antenna Payload for Radio Astronomy in Space: State of the Art

, 2019
This paper presents a brief overview of the state of the art for the design of an ultra low frequency antenna (80 kHz-30 MHz) as a payload for a CubeSat used for radio astronomy in space.
C.J.C. Vertegaal, Vertegaal, C. J. C.; id_orcid, M.J. Bentum, Vertegaal, C. J. C., Bentum, MJ, Bentum, M. J., Vertegaal, C J C   +6 more
exaly   +2 more sources

OLFAR - Orbiting Low Frequency Antennas for Radio astronomy [PDF]

, 2009
New interesting astronomical science drivers for very low frequency radio astronomy have emerged, ranging from studies of the astronomical dark ages, the epoch of reionization, exoplanets, to ultra-high energy cosmic rays. Huge efforts are currently made to establish low frequency Earthbound instruments, since today’s technology is able to support this.
Bentum, Marinus Jan, Verhoeven, Chris J.M., Boonstra, Albert-Jan   +2 more
openaire   +2 more sources

Olfar: orbiting low frequency antenna for radio astronomy [PDF]

, 2009
New interesting astronomical science drivers for very low frequency radio astronomy have emerged, ranging from studies of the astronomical dark ages, the epoch of reionization, exoplanets, to ultra-high energy cosmic rays. However, astronomical observations with Earth-bound radio telescopes at very low frequencies are hampered by the ionospheric plasma,
Bentum, Marinus Jan, Boonstra, Albert Jan   +1 more
openaire   +2 more sources

OLFAR - Orbiting low frequency antennas for radio astronomy [PDF]

, 2013
One of the last unexplored frequency ranges in radio astronomy is the frequency band below 30 MHz. New interesting astronomical science drivers for low frequency radio astronomy have emerged, ranging from studies of the astronomical dark ages, the epoch of reionization, exoplanets, to ultra-high energy cosmic rays.
Bentum, Marinus Jan
openaire   +2 more sources

Photonic swarm for low frequency radio astronomy in Space

, 2017
Radio astronomy from 100 kHz to 30 MHz allows compelling science that requires a new space based interferometer at a considerable distance from the Earth. We propose a new satellite concept which has a series of dipole antennas connected to the satellite using tethers.
Kruithof, G.H., Boonstra, A.J., Brentjens, M., Maat, P., van der Marel, J., Bentum, M.J.   +5 more
openaire   +3 more sources

PROGRESS IN THE STUDY OF DECAMETER-WAVELENGTH SOLAR RADIO EMISSION WITH UKRAINIAN RADIO TELESCOPES. Part 2 [PDF]

Radio Physics and Radio Astronomy, 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.
A. A. Stanislavsky, A. A. Koval, I. N. Bubnov, A. I. Brazhenko   +3 more
doaj   +1 more source