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The Engineering Development Array 2: design, performance and lessons from an SKA-Low prototype station

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arxiv 2112.00908 v1 pith:2YIPIRX3 submitted 2021-12-02 astro-ph.IM

The Engineering Development Array 2: design, performance and lessons from an SKA-Low prototype station

Randall Wayth , Marcin Sokolowski , Jess Broderick , Steven J. Tingay , Raunaq Bhushan , Tom Booler , Riccardo Chiello , David B. Davidson
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David Emrich Budi Juswardy David Kenney Giulia Macario Alessio Magro Andrea Mattana David Minchin Jader Monari Andrew McPhail Federico Perini Giuseppe Pupillo Marco Schiaffino Ravi Subrahmanya Andre van Es Mia Walker Mark Waterson
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We present the Engineering Development Array 2, which is one of two instruments built as a second generation prototype station for the future Square Kilometre Array Low Frequency Array. The array is comprised of 256 dual-polarization dipole antennas that can work as a phased array or as a standalone interferometer. We describe the design of the array and the details of design changes from previous generation instruments, as well as the motivation for the changes. Using the array as an imaging interferometer, we measure the sensitivity of the array at five frequencies ranging from 70 to 320 MHz.

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