RFI Mitigation with BETA
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...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
2016
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| Online Access: | http://www.atnf.csiro.au/projects/askap/aces_memo012.pdf http://hdl.handle.net/20.500.11937/73555 |
| Summary: | 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. |
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