scholarly journals Optimising the design of phased array feeds for survey speed

2020 ◽  
Vol 56 (1) ◽  
pp. 7-9
Author(s):  
Kaiya Chen ◽  
Karl F. Warnick
Keyword(s):  
Phased Array ◽  
Phased Array Feeds

scholarly journals PAFINDER – Searching for FRBs and pulsars using Phased Array Feeds

2017 ◽  
Vol 13 (S337) ◽  
pp. 370-371
Author(s):  
Mateusz Malenta ◽  
Ewan Barr ◽  
Aaron Chippendale ◽  
Xinping Deng ◽  
Daniel George ◽  
...  
Keyword(s):  
Real Time ◽  
Radio Telescope ◽  
Phased Array ◽  
Single Pulse ◽  
Radio Bursts ◽  
Pulse Detection ◽  
Phased Array Feeds

AbstractThe challenges of detecting and localising Fast Radio Bursts in real time can be met with the use of Phased Array Feeds. One such system, capable of creating up to 36 simultaneous beams, is currently being commissioned at the Effelsberg radio telescope in Germany following testing at the 64 m Parkes radio telescope. The PAFINDER (Phased Array Feed FRB Finder) pipeline will be used with this receiver to enable real–time single–pulse detection and localisation.

scholarly journals Hazards and Future Improvements to HI Surveys

1997 ◽  
Vol 14 (1) ◽  
pp. 96-98 ◽  
Author(s):  
J. Richard Fisher
Keyword(s):  
Phased Array ◽  
Substantial Improvement ◽  
Antenna Efficiency ◽  
Astronomical Observations ◽  
Major Increase ◽  
The Impact ◽  
Phased Array Feeds

AbstractMost radio astronomical observations are affected to some degree by man-made and natural interference. There are a few avoidance techniques that can reduce the impact of interference on the survey, but we must make quite significant advances in the understanding of our antennas and receivers and the interference itself before a substantial improvement can be expected. A major increase in the efficiency of future surveys will likely come from phased-array feeds, which have the potential for much closer beam spacings, greater antenna efficiency, and wider fields of view than current independent-feed arrays.

Phased array feeds for the Square Kilometre Array

2011 ◽  
Author(s):  
Wim van Cappellen ◽  
Jan Geralt Bij de Vaate ◽  
Karl Warnick ◽  
Bruce Veidt ◽  
Russell Gough ◽  
...  
Keyword(s):  
Phased Array ◽  
Square Kilometre Array ◽  
Phased Array Feeds

scholarly journals The performance and calibration of the CRAFT fly’s eye fast radio burst survey

2019 ◽  
Vol 36 ◽  
Author(s):  
C. W. James ◽  
K. W. Bannister ◽  
J.-P. Macquart ◽  
R. D. Ekers ◽  
S. Oslowski ◽  
...  
Keyword(s):  
Radio Burst ◽  
Phased Array ◽  
Radio Frequency Interference ◽  
Radio Bursts ◽  
System Noise ◽  
Fast Transients ◽  
Fast Radio Burst ◽  
Power Law Index ◽  
Phased Array Feeds ◽  
Best Fit

AbstractThe Commensal Real-time Australian Square Kilometre Array Pathfinder Fast Transients survey is the first extensive astronomical survey using phased array feeds. Since January 2017, it has been searching for fast radio bursts in fly’s eye mode. Here, we present a calculation of the sensitivity and total exposure of the survey that detected the first 20 of these bursts, using the pulsars B1641-45 and B0833-45 as calibrators. The beamshape, antenna-dependent system noise, and the effects of radio-frequency interference and fluctuations during commissioning are quantified. Effective survey exposures and sensitivities are calculated as a function of the source counts distribution. Statistical ‘stat’ and systematics ‘sys’ effects are treated separately. The implied fast radio burst rate is significantly lower than the 37 sky−1 day−1 calculated using nominal exposures and sensitivities for this same sample by Shannon et al. (2018). At the Euclidean (best-fit) power-law index of −1.5 (−2.2), the rate is $12.7_{-2.2}^{+3.3}$ (sys) ± 3.6 (stat) sky−1 day−1 ( $20.7_{-1.7}^{+2.1}$ (sys) ± 2.8 (stat) sky−1 day−1) above a threshold of 56.6 ± 6.6(sys) Jy ms (40.4 ± 1.2(sys) Jy ms). This strongly suggests that these calculations be performed for other FRB-hunting experiments, allowing meaningful comparisons to be made between them.

Beamformer Design Methods for Radio Astronomical Phased Array Feeds

2012 ◽  
Vol 60 (2) ◽  
pp. 903-914 ◽  
Author(s):  
Michael Elmer ◽  
Brian D. Jeffs ◽  
Karl F. Warnick ◽  
J. Richard Fisher ◽  
Roger D. Norrod
Keyword(s):  
Phased Array ◽  
Design Methods ◽  
Beamformer Design ◽  
Phased Array Feeds
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