Results 271 to 280 of about 74,044 (308)

THE HISTORY OF EARLY LOW FREQUENCY RADIO ASTRONOMY IN AUSTRALIA. 4: KERR, SHAIN, HIGGINS AND THE HORNSBY VALLEY FIELD STATION NEAR SYDNEY

Journal of Astronomical History and Heritage, 2015
Between 1949 and 1952 the CSIR‘s Division of Radiophysics was a world leader in low frequency radio astronomy, through research conducted mainly by Alex Shain and Charlie Higgins at their Hornsby Valley field station near Sydney. In this paper we discuss
W. Orchiston, B. Slee, M. George, R. Wielebinski   +3 more
semanticscholar   +1 more source

A Novel Low-frequency Radio Astronomical Observation Array (1 ∼ 90 MHz) and its First Light

Research in Astronomy and Astrophysics, 2023
The extremely low frequency (f < 40 MHz) is a very important frequency band for modern radio astronomy observations. It is also a key frequency band for solar radio bursts, planetary radio bursts, fast radio bursts detected in the lunar space ...
Wen-Jun Yang, Zhen Wang, Ming-Yuan Wang, Fa-Bao Yan, Guang Lu, G. Gao, Shao-Jie Guo, Yuliang Shen, Bing Xu, Yu Bai, Yong Chen, Jin-Song Ping   +11 more
semanticscholar   +1 more source

The growing impact of unintended Starlink broadband emission on radio astronomy in the SKA-Low frequency range

Astronomy & Astrophysics
We present the largest survey to date characterising intended and unintended emission from Starlink satellites across the SKA-Low frequency range. This survey analyses ∼76 million full sky images captured over ∼29 days of observing with an SKA-Low ...
D. Grigg, S. Tingay, M. Sokolowski
semanticscholar   +1 more source

THE HISTORY OF EARLY LOW FREQUENCY RADIO ASTRONOMY IN AUSTRALIA. 9: THE UNIVERSITY OF TASMANIA'S LLANHERNE (HOBART AIRPORT) FIELD STATION DURING THE 1960s‒1980s

Journal of Astronomical History and Heritage, 2018
Beginning in the early 1960s, the University of Tasmania became very involved in low frequency radio astronomical studies, which was to continue into the 1980s.
M. George, W. Orchiston, R. Wielebinski
semanticscholar   +1 more source

THE HISTORY OF EARLY LOW FREQUENCY RADIO ASTRONOMY IN AUSTRALIA. 3: ELLIS, REBER AND THE CAMBRIDGE FIELD STATION NEAR HOBART

Journal of Astronomical History and Heritage, 2015
Low frequency radio astronomy in Tasmania began with the arrival of Grote Reber to the State in 1954. 1 After analysing ionospheric data from around the world, he concluded that Tasmania would be a very suitable place to carry out low frequency ...
M. George, W. Orchiston, B. Slee, R. Wielebinski   +3 more
semanticscholar   +1 more source

Temporal variability in low-frequency radio interference: Insight from high-cadence monitoring at a candidate radio notification zone in Malaysia

Advances in Space Research
Extensive radio frequency interference (RFI) monitoring is essential in the site selection process before constructing radio astronomy observatories, followed by mitigation strategies to minimize its adverse effects. Malaysia has an enormous prospect for
A. A. Nazri, Z. Abidin, Mohamad Ridhauddin Mat Sabri, Z. Rosli, Mohd Shaiful Rizal Hassan, Mohd Shazwan Mohd Radzi, Ahmad Najwan Zulkiplee, Dalilah Nur Fathiah Hanim Razak, Norsyazwani Asmi, Jinsong Ping, Mingyuan Wang, Liang Dong   +11 more
semanticscholar   +1 more source

Solar radio astronomy at low frequencies

2008
Powerful 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.
openaire   +1 more source

Building a Global Map of Low Frequency Radio Interference From Orbit With DORA

Radio Science
Radio frequency interference (RFI), particularly human‐made RFI such as FM radio, presents a unique challenge to radio astronomy experiments at low frequencies (10–200 MHz) such as those for 21 cm cosmology and searches for exoplanet auroral emission ...
Y. Zhao, D. Jacobs, J. Bowman, T. Samson, Marc-Olivier R. Lalonde, D. Larson   +5 more
semanticscholar   +1 more source

Wideband low frequency antennas for radio astronomy arrays

2011 XXXth URSI General Assembly and Scientific Symposium, 2011
Antennas 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, Eric Kratzenberg, Brian E. Corey, Colin J. Lonsdale, Christopher L. Williams, Judd D. Bowman   +5 more
openaire   +1 more source

THE HISTORY OF EARLY LOW FREQUENCY RADIO ASTRONOMY IN AUSTRALIA. 5: REBER AND THE KEMPTON FIELD STATION IN TASMANIA

Journal of Astronomical History and Heritage, 2015
After initially making low frequency observations with Graeme Ellis near Hobart, Tasmania, in 1955, Grote Reber returned to Tasmania to carry out further observations in 1956-1957 near Kempton, to the north of Hobart.
M. George, W. Orchiston, R. Wielebinski, B. Slee   +3 more
semanticscholar   +1 more source