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The Aperture Array Verification System 1: System overview and early commissioning results

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arxiv 2110.03217 v1 pith:SWQRQJFD submitted 2021-10-07 astro-ph.IM

P. Benthem , R. Wayth , E. de Lera Acedo , K. Zarb Adami , M. Alderighi , C. Belli , P. Bolli , T. Booler
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J.Borg J. W. Broderick S. Chiarucci R. Chiello L. Ciani G. Comoretto B. Crosse D. Davidson A. DeMarco D. Emrich A. van Es D. Fierro A. Faulkner M. Gerbers N. Razavi-Ghods P. Hall L.Horsley B. Juswardy D. Kenney K. Steele A. Magro A. Mattana B. McKinley J. Monari G. Naldi J. Nanni P. Di Ninni F. Paonessa F. Perini M. Poloni G. Pupillo S. Rusticelli M. Schiaffino F. Schillirò H.Schnetler R. Singuaroli M. Sokolowski A. Sutinjo G. Tartarini D. Ung J. G. Bij de Vaate G. Virone M.Walker M. Waterson S. J. Wijnholds A. Williams
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keywords arraysystemaperturecommissioningoverviewresultsaavs1calibration
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The design and development process for the Square Kilometre Array (SKA) radio telescope, the Low Frequency Aperture Array component, was progressed during the SKA pre-construction phase by an international consortium, with the goal of meeting requirements for a critical design review. As part of the development process a full-sized prototype SKA Low station was deployed, the Aperture Array Verification System 1 (AAVS1). We provide a system overview and describe the commissioning results of AAVS1, which is a low frequency radio telescope with 256 dual-polarisation log-periodic dipole antennas working as a phased array. A detailed system description is provided, including an in-depth overview of relevant sub-systems, ranging from hardware, firmware, software, calibration,and control sub-systems. Early commissioning results cover initial bootstrapping, array calibration, stability testing, beam-forming,and on-sky sensitivity validation. Lessons learned are presented, along with future developments.

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  1. Enhanced detection and identification of satellites using an all-sky multi-frequency survey with prototype SKA-Low stations

    astro-ph.EP 2024-12 conditional novelty 6.0 of 10

    A multi-frequency survey with prototype SKA-Low stations identified 152 unique satellites, measured their radio emissions, and found the new identification pipeline has a simulated misidentification rate below 1%.

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