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RFI mitigation within the LOFAR radio telescope

Salverda, J. (2002) RFI mitigation within the LOFAR radio telescope. Master's Thesis / Essay, Computing Science.

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Only a decade after the discovery of radio telescopes astronomers took real interest in this field. Resolving power wasn 't comparable to optical telescopes until the first interferometers were constructed. To observe low radio frequencies, which until now have gone unexplored through interference of our ionosphere, it is necessary to have a self-calibrating radio telescope. By moving the telescope into the domain of the digital computer and by combining several new ICT concepts it will be possible to build this telescope, called LOFAR (LOw Frequency ARray). The modeling of interfering signals, which have to be removed to make observations worthwhile, is central in this thesis. Where to store data about these interfering signals looked like the main problem at first, but a closer study reveals that the real problem is how to unO5' the models, by using data generated at multiple sensors. The telescope, the mitigation process and databases are discussed, to have sufficient grounds to reach a conclusion about how to organize the mitigation within the LOFAR telescope. It is concluded that a decentralized database with intermediating agents (to unify the RFI models) is the best way to deal with the problem.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Computing Science
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:30
Last Modified: 15 Feb 2018 07:30

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