scholarly journals Characterization of a Low-Frequency Radio Astronomy Prototype Array in Western Australia

2015 ◽  
Vol 63 (12) ◽  
pp. 5433-5442 ◽  
Author(s):  
A. T. Sutinjo ◽  
T. M. Colegate ◽  
R. B. Wayth ◽  
P. J. Hall ◽  
E. de Lera Acedo ◽  
...  
Keyword(s):  
Western Australia ◽  
Radio Astronomy ◽  
Low Frequency

scholarly journals MWA tied-array processing I: Calibration and beamformation

2019 ◽  
Vol 36 ◽  
Author(s):  
S. M. Ord ◽  
S. E. Tremblay ◽  
S. J. McSweeney ◽  
N. D. R. Bhat ◽  
C. Sobey ◽  
...  
Keyword(s):  
Western Australia ◽  
Radio Astronomy ◽  
Low Frequency ◽  
Frequency Resolution ◽  
Science Program ◽  
Astronomy Observatory ◽  
Beam Formation ◽  
Imaging Telescope ◽  
Signal Path ◽  
Murchison Widefield Array

AbstractThe Murchison Widefield Array is a low-frequency Square Kilometre Array precursor located at the Murchison Radio-astronomy Observatory in Western Australia. Primarily designed as an imaging telescope, but with a flexible signal path, the capabilities of this telescope have recently been extended to include off-line incoherent and tied-array beam formation using recorded antenna voltages. This has provided the capability for high-time and frequency resolution observations, including a pulsar science program. This paper describes the algorithms and pipeline that we have developed to form the tied-array beam products from the summation of calibrated signals of the antenna elements, and presents example polarimetric profiles for PSRs J0437-4715 and J1900-2600 at 185 MHz.

Using low-frequency noise characterization of AlGaN/GaN HEMT as a tool for technology assessment and failure prediction

2004 ◽  
Author(s):  
Jean-Guy Tartarin ◽  
Geoffroy Soubercaze-Pun ◽  
Abdelali Rennane ◽  
Laurent Bary ◽  
Robert Plana ◽  
...  
Keyword(s):  
Technology Assessment ◽  
Low Frequency ◽  
Failure Prediction ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Gan Hemt ◽  
Noise Characterization

Ultra-Wideband Aperture Array Element Design for Low Frequency Radio Astronomy

2011 ◽  
Vol 59 (6) ◽  
pp. 1808-1816 ◽  
Author(s):  
Eloy de Lera Acedo ◽  
Nima Razavi-Ghods ◽  
Luis Enrique Garcia ◽  
Peter Duffett-Smith ◽  
P. Alexander
Keyword(s):  
Radio Astronomy ◽  
Low Frequency ◽  
Array Element ◽  
Ultra Wideband ◽  
Aperture Array
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