The Low-Frequency Environment of the Murchison Widefield Array: Radio-Frequency Interference Analysis and Mitigation
- Offringa, A.
- Wayth, Randall
- Hurley-Walker, N.
- Kaplan, D.
- Barry, N.
- Beardsley, A.
- Bell, M.
- Bernardi, G.
- Bowman, J.
- Briggs, F.
- Callingham, J.
- Cappallo, R.
- Carroll, P.
- Deshpande, A.
- Dillon, J.
- Dwarakanath, K.
- Ewall-Wice, A.
- Feng, L.
- For, B.
- Gaensler, B.
- Greenhill, L.
- Hancock, P.
- Hazelton, B.
- Hewitt, J.
- Hindson, L.
- Jacobs, D.
- Johnston-Hollitt, M.
- Kapinska, A.
- Kim, H.
- Kittiwisit, P.
- Lenc, E.
- Line, J.
- Loeb, A.
- Lonsdale, C.
- McKinley, B.
- McWhirter, S.
- Mitchell, D.
- Morales, M.
- Morgan, E.
- Morgan, J.
- Neben, A.
- Oberoi, D.
- Ord, Stephen
- Paul, S.
- Pindor, B.
- Pober, J.
- Prabu, T.
- Procopio, P.
- Riding, J.
- Shankar, N.
- Sethi, S.
- Srivani, K.
- Staveley-Smith, L.
- Subrahmanyan, R.
- Sullivan, I.
- Tegmark, M.
- Thyagarajan, N.
- Tingay, Steven
- Trott, C.
- Webster, R.
- Williams, A.
- Williams, C.
- Wu, C.
- Wyithe, J.
- Zheng, Q.
DOIAbstract
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-fre...
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