NDLI: The Square Kilometre Array Interferometer-The Radio Telescope for the 21 st Century

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The Square Kilometre Array Interferometer-The Radio Telescope for the 21 st Century

Content Provider	Semantic Scholar
Author	Smits
Copyright Year	1998
Abstract	Radio astronomy research in the 21 century requires a radio telescope which is two orders of magnitude more sensitive than present-day radio telescopes and which shows exceptional immunity to man-made interference. Several concepts to realise this telescope are being studied throughout the world. At NFRA a feasibility study is being performed of the phased array concept. This requires the application of various very advanced technologies. This poses several challenges which have to be addressed. In this paper, the various feasibility study issues are outlined. Furthermore, the status is discussed of two development projects that are part of this study: AAD, the Adaptive Antenna Demonstration system built at NFRA achieved adaptive RFI rejection to a level of down to -37 dB, and provided valuable insight in calibration aspects. The design of OSMA, the One Square Meter Array, is now finalised. OSMA will allow us to investigate 1) octave bandwidth phased array behaviour in the range between dense array and sparse array; 2) dual beam, shared aperture beamforming; 3) hierarchical adaptive beamforming using both RF and digital techniques. The system will be installed in the summer of 1998, and will be fully operational by the end of 1998.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.nfra.nl/ska/archive/technical/smi01.ps.gz
Alternate Webpage(s)	http://www.nfra.nl/ska/archive/technical/smi01.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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