dc.contributor.author | Lonsdale, Colin John | |
dc.contributor.author | McWhirter, Stephen R. | |
dc.contributor.author | Dillon, Joshua Shane | |
dc.contributor.author | Ewall-Wice, Aaron Michael | |
dc.contributor.author | Feng, Lu | |
dc.contributor.author | Neben, Abraham Richard | |
dc.contributor.author | Tegmark, Max Erik | |
dc.contributor.author | Williams, Christopher Leigh | |
dc.contributor.author | Cappallo, Roger J | |
dc.contributor.author | Hewitt, Jacqueline N | |
dc.contributor.author | Morgan, Edward H | |
dc.date.accessioned | 2015-08-07T13:12:21Z | |
dc.date.available | 2015-08-07T13:12:21Z | |
dc.date.issued | 2015-03 | |
dc.date.submitted | 2014-12 | |
dc.identifier.issn | 1323-3580 | |
dc.identifier.issn | 1448-6083 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/98050 | |
dc.description.abstract | The 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.iso | en_US | |
dc.publisher | CSIRO Publishing | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1017/pasa.2015.7 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | en_US |
dc.source | arXiv | en_US |
dc.title | The Low-Frequency Environment of the Murchison Widefield Array: Radio-Frequency Interference Analysis and Mitigation | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Offringa, 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.department | Haystack Observatory | en_US |
dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
dc.contributor.mitauthor | Cappallo, Roger J. | en_US |
dc.contributor.mitauthor | Lonsdale, Colin John | en_US |
dc.contributor.mitauthor | McWhirter, Stephen R. | en_US |
dc.contributor.mitauthor | Dillon, Joshua Shane | en_US |
dc.contributor.mitauthor | Ewall-Wice, Aaron Michael | en_US |
dc.contributor.mitauthor | Feng, Lu | en_US |
dc.contributor.mitauthor | Hewitt, Jacqueline N. | en_US |
dc.contributor.mitauthor | Morgan, Edward H. | en_US |
dc.contributor.mitauthor | Neben, Abraham Richard | en_US |
dc.contributor.mitauthor | Tegmark, Max Erik | en_US |
dc.contributor.mitauthor | Williams, Christopher Leigh | en_US |
dc.relation.journal | Publications of the Astronomical Society of Australia | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Offringa, 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.orcid | https://orcid.org/0000-0002-4117-570X | |
dc.identifier.orcid | https://orcid.org/0000-0001-7776-7240 | |
dc.identifier.orcid | https://orcid.org/0000-0001-7130-208X | |
dc.identifier.orcid | https://orcid.org/0000-0002-0086-7363 | |
dc.identifier.orcid | https://orcid.org/0000-0003-3336-9958 | |
dc.identifier.orcid | https://orcid.org/0000-0001-7670-7190 | |
dc.identifier.orcid | https://orcid.org/0000-0003-0422-2324 | |
mit.license | OPEN_ACCESS_POLICY | en_US |
mit.metadata.status | Complete | |