Results 261 to 270 of about 74,044 (308)

Communication protocol for a satellite-swarm interferometer for low-frequency radio astronomy

Acta Astronautica, 2023
Orbiting low frequency antennas for radio astronomy (OLFAR) that capture cosmic signals in the frequency range below 30MHz could provide valuable insights on our Universe.
Oliver Nagy, Manish Pandey, G. Exarchakos, M. Bentum, R. Hofstad   +4 more
semanticscholar   +1 more source

Ultra-low-frequency radio astronomy observations from a Seleno-centric orbit

Experimental astronomy (Print), 2022
This paper introduces the first results of observations with the Ultra-Long-Wavelength (ULW) —- Low Frequency Interferometer and Spectrometer (LFIS) on board the selenocentric satellite Longjiang-2 .
Jingye Yan, Ji Wu, L. Gurvits, Lin Wu, L. Deng, Fei Zhao, Li Zhou, A. Lan, Wenjie Fan, Min Yi, Yang Yang, Zhen Yang, Mingchuan Wei, Jinsheng Guo, S. Qiu, Fan Wu, Chaoran Hu, Xuelei Chen, H. Rothkaehl, M. Morawski   +19 more
semanticscholar   +1 more source

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
B. Cecconi
openaire   +4 more sources

THE HISTORY OF EARLY LOW FREQUENCY RADIO ASTRONOMY IN AUSTRALIA. 2: TASMANIA

Journal of Astronomical History and Heritage, 2015
Significant contributions to low frequency radio astronomy were made in the Australian state of Tasmania after the arrival of Grote Reber in 1954. Initially, Reber teamed with Graeme Ellis, who was then working with the Ionospheric Prediction Service ...
George, M., Orchiston, W., Slee, B., Wielebinski, R.   +3 more
openaire   +3 more sources

Survey, Characterizing and Mitigating Radio Frequency Interference in Low Frequency Radio Astronomy

Proceedings of the 6th URSI Regional Conference on Radio Science – RCRS 2024
Indrajit Vittal Barve, Gireesh G.V.S, Shanmukha rao B, Kathiravan C, Ramesh R   +4 more
openaire   +2 more sources

Design of Switchable Hairpin Band Pass Filters for Low Frequency Radio Astronomy

IEEE MTT-S International Microwave and RF Conference, 2019
In this paper, we present a novel switched band pass filter bank designed using hairpin line topology. This new filter bank design is implemented to facilitate narrow bandwidth mode observations for the upgraded GMRT (uGMRT), as well as providing an ...
Imran Khan, Anil N Raut, S. Sureshkumar
semanticscholar   +1 more source

Phased Subarray of the Low-Frequency Radio Telescope GURT as a Standalone Instrument for Radio Astronomy Studies

2020 IEEE Ukrainian Microwave Week (UkrMW), 2020
Cutting edge astrophysical studies require more and more observing time at low-frequency radio telescopes, which is limited and quite expensive. Modern digital signal processing systems still unable to provide affordable computational and storage ...
S. Yerin, A. Konovalenko, P. Tokarsky, I. Bubnov, V. Zakharenko, O. Ulyanov, G. Kvasov, V. Dorovskyy, V. Melnik, M. Kalinichenko, A. Stanislavsky, M. Shevchuk, A. Shevtsova, V. Kharlanova, Y. Vasylkivskyi, I. Kravtsov, A. Reznichenko, V. Bortsov, V. Lisachenko, M. Sydorchuk, S. Stepkin, V. Shepelev, A. Khristenko, A. Belov, A. Myasoyed, D. Mukha, P. Zarka, H. Rucker, M. Panchenko, L. Denis, A. Coffre, D. Charier, J. Girard   +32 more
semanticscholar   +1 more source

Solar Radio Astronomy at Low Frequencies

Symposium - International Astronomical Union, 2002
This 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.
openaire   +2 more sources

THE HISTORY OF EARLY LOW FREQUENCY RADIO ASTRONOMY IN AUSTRALIA. 1: THE CSIRO DIVISION OF RADIOPHYSICS

Journal of Astronomical History and Heritage, 2015
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.
W. Orchiston, M. George, B. Slee, R. Wielebinski   +3 more
semanticscholar   +1 more source

Very low frequency radio astronomy

Advances in Space Research, 1996
Abstract 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.
openaire   +1 more source