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dc.contributor.authorLonsdale, Colin John
dc.contributor.authorMcWhirter, Stephen R.
dc.contributor.authorDillon, Joshua Shane
dc.contributor.authorEwall-Wice, Aaron Michael
dc.contributor.authorFeng, Lu
dc.contributor.authorNeben, Abraham Richard
dc.contributor.authorTegmark, Max Erik
dc.contributor.authorWilliams, Christopher Leigh
dc.contributor.authorCappallo, Roger J
dc.contributor.authorHewitt, Jacqueline N
dc.contributor.authorMorgan, Edward H
dc.date.accessioned2015-08-07T13:12:21Z
dc.date.available2015-08-07T13:12:21Z
dc.date.issued2015-03
dc.date.submitted2014-12
dc.identifier.issn1323-3580
dc.identifier.issn1448-6083
dc.identifier.urihttp://hdl.handle.net/1721.1/98050
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 resolution (second and kHz-scale respectively).en_US
dc.language.isoen_US
dc.publisherCSIRO Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1017/pasa.2015.7en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titleThe Low-Frequency Environment of the Murchison Widefield Array: Radio-Frequency Interference Analysis and Mitigationen_US
dc.typeArticleen_US
dc.identifier.citationOffringa, A. R., R. B. Wayth, N. Hurley-Walker, D. L. Kaplan, N. Barry, A. P. Beardsley, M. E. Bell, et al. “The Low-Frequency Environment of the Murchison Widefield Array: Radio-Frequency Interference Analysis and Mitigation.” Publications of the Astronomical Society of Australia 32 (2015).en_US
dc.contributor.departmentHaystack Observatoryen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorCappallo, Roger J.en_US
dc.contributor.mitauthorLonsdale, Colin Johnen_US
dc.contributor.mitauthorMcWhirter, Stephen R.en_US
dc.contributor.mitauthorDillon, Joshua Shaneen_US
dc.contributor.mitauthorEwall-Wice, Aaron Michaelen_US
dc.contributor.mitauthorFeng, Luen_US
dc.contributor.mitauthorHewitt, Jacqueline N.en_US
dc.contributor.mitauthorMorgan, Edward H.en_US
dc.contributor.mitauthorNeben, Abraham Richarden_US
dc.contributor.mitauthorTegmark, Max Eriken_US
dc.contributor.mitauthorWilliams, Christopher Leighen_US
dc.relation.journalPublications of the Astronomical Society of Australiaen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsOffringa, A. R.; Wayth, R. B.; Hurley-Walker, N.; Kaplan, D. L.; Barry, N.; Beardsley, A. P.; Bell, M. E.; Bernardi, G.; Bowman, J. D.; Briggs, F.; Callingham, J. R.; Cappallo, R. J.; Carroll, P.; Deshpande, A. A.; Dillon, J. S.; Dwarakanath, K. S.; Ewall-Wice, A.; Feng, L.; For, B.-Q.; Gaensler, B. M.; Greenhill, L. J.; Hancock, P.; Hazelton, B. J.; Hewitt, J. N.; Hindson, L.; Jacobs, D. C.; Johnston-Hollitt, M.; Kapińska, A. D.; Kim, H.-S.; Kittiwisit, P.; Lenc, E.; Line, J.; Loeb, A.; Lonsdale, C. J.; McKinley, B.; McWhirter, S. R.; Mitchell, D. A.; Morales, M. F.; Morgan, E.; Morgan, J.; Neben, A. R.; Oberoi, D.; Ord, S. M.; Paul, S.; Pindor, B.; Pober, J. C.; Prabu, T.; Procopio, P.; Riding, J.; Udaya Shankar, N.; Sethi, S.; Srivani, K. S.; Staveley-Smith, L.; Subrahmanyan, R.; Sullivan, I. S.; Tegmark, M.; Thyagarajan, N.; Tingay, S. J.; Trott, C. M.; Webster, R. L.; Williams, A.; Williams, C. L.; Wu, C.; Wyithe, J. S.; Zheng, Q.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-4117-570X
dc.identifier.orcidhttps://orcid.org/0000-0001-7776-7240
dc.identifier.orcidhttps://orcid.org/0000-0001-7130-208X
dc.identifier.orcidhttps://orcid.org/0000-0002-0086-7363
dc.identifier.orcidhttps://orcid.org/0000-0003-3336-9958
dc.identifier.orcidhttps://orcid.org/0000-0001-7670-7190
dc.identifier.orcidhttps://orcid.org/0000-0003-0422-2324
mit.licenseOPEN_ACCESS_POLICYen_US
mit.metadata.statusComplete


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