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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6241
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dc.contributor.authorOffringa, A.R.-
dc.contributor.authorWayth, R.B.-
dc.contributor.authorDeshpande, A.A.-
dc.contributor.authorPaul, S-
dc.contributor.authorPrabu, T.-
dc.contributor.authorUdaya Shankar, N.-
dc.contributor.authorSethi, S.K.-
dc.contributor.authorSrivani, K.S.-
dc.contributor.authorSubrahmanyan, Ravi-
dc.contributor.author+25 Co-authors-
dc.date.accessioned2015-05-26T12:54:56Z-
dc.date.available2015-05-26T12:54:56Z-
dc.date.issued2015-03-03-
dc.identifier.citationPublications of the Astronomical Society of Australia,2015,Vol.32, e008en
dc.identifier.issn1323-3580-
dc.identifier.issn1448-6083(online)-
dc.identifier.urihttp://hdl.handle.net/2289/6241-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractThe Murchison Widefield Array is a new low-frequency interferometric radio telescope built in Western Australia at one of the locations of the future Square Kilometre Array. We describe the automated radio-frequency interference detection strategy implemented for the Murchison Widefield Array, which is based on the aoflagger platform, and present 72–231 MHz radio-frequency interference statistics from 10 observing nights. Radio-frequency interference detection removes 1.1% of the data. Radio-frequency interference from digital TV is observed 3% of the time due to occasional ionospheric or atmospheric propagation. After radio-frequency interference detection and excision, almost all data can be calibrated and imaged without further radio-frequency interference mitigation efforts, including observations within the FM and digital TV bands. The results are compared to a previously published Low-Frequency Array radio-frequency interference survey. The remote location of the Murchison Widefield Array results in a substantially cleaner radio-frequency interference environment compared to Low-Frequency Array’s radio environment, but adequate detection of radio-frequency interference is still required before data can be analysed. We include specific recommendations designed to make the Square Kilometre Array more robust to radio-frequency interference, including: the availability of sufficient computing power for radio-frequency interference detection; accounting for radio-frequency interference in the receiver design; a smooth band-pass response; and the capability of radio-frequency interference detection at high time and frequency resolutionen
dc.language.isoenen
dc.publisherCambridge University Press for Astronomical Society of Australiaen
dc.relation.urihttp://adsabs.harvard.edu/abs/2015PASA...32....8Oen
dc.relation.urihttp://arxiv.org/abs/1501.03946en
dc.relation.urihttp://dx.doi.org/10.1017/pasa.2015.7en
dc.rights2015 Astronomical Society of Australiaen
dc.titleThe low-frequency environment of the Murchison widefield array: radio-frequency interference analysis and mitigationen
dc.typeArticleen
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