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http://hdl.handle.net/2289/6241
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DC Field | Value | Language |
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dc.contributor.author | Offringa, A.R. | - |
dc.contributor.author | Wayth, R.B. | - |
dc.contributor.author | Deshpande, A.A. | - |
dc.contributor.author | Paul, S | - |
dc.contributor.author | Prabu, T. | - |
dc.contributor.author | Udaya Shankar, N. | - |
dc.contributor.author | Sethi, S.K. | - |
dc.contributor.author | Srivani, K.S. | - |
dc.contributor.author | Subrahmanyan, Ravi | - |
dc.contributor.author | +25 Co-authors | - |
dc.date.accessioned | 2015-05-26T12:54:56Z | - |
dc.date.available | 2015-05-26T12:54:56Z | - |
dc.date.issued | 2015-03-03 | - |
dc.identifier.citation | Publications of the Astronomical Society of Australia,2015,Vol.32, e008 | en |
dc.identifier.issn | 1323-3580 | - |
dc.identifier.issn | 1448-6083(online) | - |
dc.identifier.uri | http://hdl.handle.net/2289/6241 | - |
dc.description | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) | en |
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 | en |
dc.language.iso | en | en |
dc.publisher | Cambridge University Press for Astronomical Society of Australia | en |
dc.relation.uri | http://adsabs.harvard.edu/abs/2015PASA...32....8O | en |
dc.relation.uri | http://arxiv.org/abs/1501.03946 | en |
dc.relation.uri | http://dx.doi.org/10.1017/pasa.2015.7 | en |
dc.rights | 2015 Astronomical Society of Australia | en |
dc.title | The low-frequency environment of the Murchison widefield array: radio-frequency interference analysis and mitigation | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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2015_PASA_32_e008.pdf Restricted Access | Restricted Access | 1.22 MB | Adobe PDF | View/Open Request a copy |
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