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Galaxy Tomography with the Gravitational Wave Background from Supermassive Black Hole Binaries
Chen Y.
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The radio environment for a space-based low-frequency radio astronomy instrument [PDF]
2019 IEEE Aerospace Conference, 2019 Opening the last frequency window for radio astronomy in the sub - 30 MHz region includes a few challenges. First of all, at frequencies below 30 MHz the Earths ionosphere severely distorts radio waves originating from celestial sources, and it completely blocks radio waves below 10 MHz.
Mark J. Bentum, Pieter van Vugt
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Orbiting Low Frequency Array for radio astronomy [PDF]
2011 Aerospace Conference, 2011 Recently new and interesting science drivers have emerged for very low frequency radio astronomy from 0.3 MHz to 30 MHz. However Earth bound radio observations at these wavelengths are severely hampered by ionospheric distortions, man made interference, solar flares and even complete reflection below 10 MHz.
Rajan, Rai Thilak +3 more
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Low-frequency radio astronomy engineering in Western Australia
2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO), 2017I will discuss low-frequency radio astronomy engineering efforts underway in Western Australia. We carry out this work through the International Centre for Radio Astronomy Research (ICRAR)/Curtin University. The frequency range of interest is ∼50 to ∼350 MHz, which is the Low-Frequency Square Kilometre Array (SKA-Low) frequency band.
Adrian Sutinjo
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Calibration challenges for low frequency radio astronomy
2011 XXXth URSI General Assembly and Scientific Symposium, 2011A major challenge for all high resolution low frequency radio astronomy is measuring and removing the effects of the ionosphere. The isoplanatic patch size for frequencies below a few hundred MHz is generally much smaller than the field of view. In addition, aperture arrays have beams on the sky which vary dramatically with observing geometry.
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Solar Radio Astronomy at Low Frequencies
Symposium - International Astronomical Union, 2002This review is concerned to study of sun at frequencies lower than 1.4 GHz. Emphasis is made on results which illustrate the topics in which GMRT could play a major role. Coordinated studies including spectral and imaging radio observations are important for research in solar physics.
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Very low frequency radio astronomy
Advances in Space Research, 1996Abstract Very low frequency (VLF) radio astronomy covers the frequency range below about 30 MHz (or the wavelength range above 10 m). This is the last window of the electromagnetic spectrum never to have been observed with spatial resolution. This is a range over which the Earth's ionosphere transmits either poorly or not at all.
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The RFI situation for a space-based low-frequency radio astronomy instrument [PDF]
, 2016 Space based ultra-long wavelength radio astronomy has recently gained a lot of interest. Techniques to open the virtually unexplored frequency band below 30 MHz are becoming within reach at this moment.
Mark J. Bentum
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Solar radio astronomy at low frequencies
2008Powerful radio radiation often originates from the Sun at decametric and kilometric wavelengths. Radiation from the quiet Sun is produced by the thermal mechanism of bremsstrahlung, and radio bursts of several kinds are produced by the non-thermal mechanisms of plasma radiation and, rarely, gyrosynchrotron radiation.
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Wideband low frequency antennas for radio astronomy arrays
2011 XXXth URSI General Assembly and Scientific Symposium, 2011Antennas in the frequency range 10 to 300 MHz are being designed with all-sky coverage, a low response at the horizon to minimize interference from terrestrial sources, negligible ground loss and a good low noise match to the low noise amplifier (LNA).
Alan E. E. Rogers +5 more
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