Results 251 to 260 of about 11,729,249 (285)

Introduction to Low Frequency Radio Astronomy

2018
Radio astronomy began at low (ν ≪ 300 MHz) frequencies, but until recently has traditionally been dominated by higher frequency work. With the advent of a new generation of low frequency interferometers and the anticipation of the low-frequency component of the Square Kilometre Array (SKA), the field is experiencing a rebirth. This introductory chapter
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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, Bentum, M. J.   +3 more
exaly   +2 more sources

MASER: a toolbox for low frequency radio astronomy

2018
The MASER (Measuring, Analysing and Simulating Radio Emissions) project provides a comprehensive infrastructure dedicated to low frequency radio emissions (typically < 50 to 100 MHz). The four main radio sources observed in this frequency are the Earth, the Sun, Jupiter and Saturn. They are observed either from ground (down to 10 MHz) or from space.
Cecconi, Baptiste, Piker, C. W., Erard, Stéphane, Le Sidaner, Pierre, Lamy, Laurent, André, Nicolas, Griessmeier, Jean-Mathias, Bonnin, Xavier, Coffre, Andrée, Genot, Vincent, Savalle, Renaud, Louis, Corentin, Aicardi, Stéphane, Denis, Laurent, Faden, J., Mafi, J. N., Sharlow, M., Sky, J., Demleitner, M.   +18 more
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UWB active antenna array for low frequency radio astronomy

2012 6th International Conference on Ultrawideband and Ultrashort Impulse Signals, 2012
The decameter wavelength range is of interest for radio astronomy at the present time. Construction of giant low-frequency radio telescopes has been planned and is being carried out in European Union (Low Frequency Array - LOFAR), USA (Long Wavelength Array - LWA) and in Ukraine (Giant Ukrainian Radio Telescope - GURT).
A. A. Konovalenko, I. S. Falkovich, A. A. Gridin, P. L. Tokarsky, S. N. Yerin   +4 more
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A satellite-borne receiver for low-frequency radio astronomy

Radio and Electronic Engineer, 1968
A receiver designed to measure the galactic noise spectrum in the range from 2 to 4.5 MHz and flown in the Ariel III satellite is described. Problems arising from the use of a loop antenna with a swept receiver and the exclusion of spurious signals from terrestrial sources and other experiments in the payload are discussed. Preliminary results indicate
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Very low frequency radio astronomy from the moon

2008
Lunar development is virtually certain to occur in the next 10–20 years. Very low frequency radio astronomy observations can and should begin with the first lander. A modest yet powerful near-side array should be built if backside development will be substantially delayed. A major backside array should be constructed when technology and funding permit.
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Design and Implementation of a Digital Receiver for Low Frequency Radio Astronomy

2022 4th International Conference on Artificial Intelligence and Advanced Manufacturing (AIAM), 2022
Yun Yu, Quan Guo
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The current status of low frequency radio astronomy from space

2000
Ground-based radio astronomy is severely limited by the Earth's ionosphere. Below 15 - 20 MHz, space-based radio observations are superior or even mandatory. Three different areas of astronomical research manifest themselves at low radio frequencies: solar, planetary, and galactic-extragalactic.
M. L. Kaiser, K. W. Weiler
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An evolutionary sequence of low frequency radio astronomy missions

2008
A progression from simple, near-term experiments to Explorer-class dedicated missions to a large lunar faxside array is a natural way to develop the observational capabilities needed for radio astronomy at low frequencies. This continuous increase in mission capabilities and scientific return is similar to the progression of infrared and X-ray missions.
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Goniopolarimetric techniques for low-frequency radio astronomy in space

2013
The principles of space-based low-frequency radio astronomy are briefly introduced. As the wavelength range considered does not allow the use of focusing systems, goniopolarimetric (or “direction-finding”) techniques have been developed. These techniques are presented, and their limitations are discussed. An example from a recent study on auroral radio
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