Results 51 to 60 of about 2,143 (164)
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. +5 more
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Microwave amplification based on quasiparticle SIS up and down frequency converters
AIP Advances, 2018 Heterodyne instruments have recently attained quantum-limited low-noise performance, particularly in radio astronomy, but it is difficult to develop large heterodyne arrays such as a modern radio camera using cryogenic sensitive detectors based on ...
T. Kojima, Y. Uzawa, W. Shan
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H i Content of Group Galaxies from the FAST All Sky H i Survey
The Astrophysical JournalWe investigate the atomic gas (H i ) content of galaxies in groups using early data from the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) All Sky H i survey. Taking advantage of FAST’s blind, wide-area coverage and uniform sensitivity, we
Shulan Yan +5 more
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Excising terrestrial radio interference in low frequency radio astronomy [PDF]
Monthly Notices of the Royal Astronomical Society, 1982 B. L. Kasper, F. S. Chute, D. Routledge
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The Astrophysical JournalWe conducted a sensitive acceleration search using fast Fourier transform techniques on full-length and segmented data from 84 observations of the globular cluster M13 with the Five-hundred-meter Aperture Spherical radio Telescope.
Dejiang Yin +9 more
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An Empirical Study On Imaging Sensitivity Of SKA1-LOW Based on Point Source Sensitivity
The Astronomical JournalThe Square Kilometre Array (SKA) radio telescope will achieve unparalleled sensitivity and angular resolution, substantially progressing our research into the formation and development of the early universe.
Zhaotong Xie +4 more
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OLFAR - Orbiting Low Frequency Antennas for Radio astronomy
, 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 +2 more
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Al-Mustansiriyah Journal of ScienceRadiofrequency interference (RFI) describes the weakening of radio astronomy transmissions caused by man-made radio signal noise in radio telescope observation indicates the level of radio frequency noise in the sky at all times, regardless of any ...
Zina Fadel Kahdim, Kamal M. Abood
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A new broad K/Ka-band receiver (18.0–32.3 GHz) for the Yebes Observatory’s 40 meter radio telescope★
Astronomy & AstrophysicsSince 2010, the 40 m radio telescope of the Yebes Observatory has been devoted to very long baseline interferometry (VLBI) and single-dish observations. Up until 2019, it covered frequency bands between 2 GHz and 90 GHz in discontinuous and narrow radio ...
López-Pérez J. A. +28 more
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Olfar: orbiting low frequency antenna for radio astronomy
, 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 +1 more
openaire +1 more source