RFI Mitigation with BETA

Bannister, K.; Hellbourg, Gregory; Hotan, A.

Access Status

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Authors

Bannister, K.

Hellbourg, Gregory

Hotan, A.

Date

2016

Type

Journal Article

Metadata

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Citation

Bannister, K. and Hellbourg, G. and Hotan, A. 2016. RFI Mitigation with BETA. ASKAP Commissioning & Early Science Memo: Memo 012.

Source Title

ASKAP Commissioning & Early Science Memo

Additional URLs

http://www.atnf.csiro.au/projects/askap/aces_memo012.pdf

School

School of Electrical Engineering, Computing and Mathematical Science (EECMS)

URI

http://hdl.handle.net/20.500.11937/73555

Collection

Curtin Research Publications

Abstract

The Boolardy Engineering Test Array (BETA) is a 6 antenna interferometer, with each antenna having a 188-element phased array feed at the prime focus. Here we attempt to mitigate the affect of radio frequency interference (RFI) by updating the beam weights using a projection algorithm applied to the measured single-dish array covariance matrix. We observe an astronomical source at 1225 MHz, which contains substantial interference from the GPS L2 band, and compare a number of different projection algorithms by looking at the affect on correlated visibilities, and on the resulting images. The RFI projection algorithms perform remarkably well, yielding a promising future for this technique.