A 16-antenna prototype station, the "ARA Testbed" , of the ARA system was installed January 2011 (season 2010–2011) and began operation allowing the ARA Collaboration to determine the estimated sensitivity of the array design:[3] ARA-37 will cover 200 km2 with neutrino sensitivity of 1016–1019 eV. Measurements of the radio background and ice attenuation length were reported.
The first ARA station was installed in the season (Antarctic summer season; winter in northern hemisphere) 2011–2012; stations 2 and 3 were installed in the season 2012–2013 and stations 4 and 5 in season 2017–2018. The ARA array had five stations as of 2018. The Phase 1 goal of ARA is 37 stations.[4]
^P. Allison; J. Auffenberg; R. Bard; J.J. Beatty; D.Z. Besson; S. Böser; C. Chen; P. Chen; A. Connolly; J. Davies; M. DuVernois; B. Fox; P.W. Gorham; E.W. Grashorn; K. Hanson; J. Haugen; K. Helbing; B. Hill; K.D. Hoffman; E. Hong; M. Huang; M.H.A. Huang; A. Ishihara; A. Karle; D. Kennedy; H. Landsman; T.C. Liu; L. Macchiarulo; K. Mase; T. Meures; R. Meyhandan; C. Miki; R. Morse; M. Newcomb; R.J. Nichol; K. Ratzlaff; M. Richman; L. Ritter; C. Rott; B. Rotter; P. Sandstrom; D. Seckel; J. Touart; G.S. Varner; M.-Z. Wang; C. Weaver; A. Wendorff; S. Yoshida; R. Young (February 2012). "Design and initial performance of the Askaryan Radio Array prototype EeV neutrino detector at the South Pole". Astroparticle Physics. 35 (7): 457. arXiv:1105.2854. Bibcode:2012APh....35..457A. doi:10.1016/j.astropartphys.2011.11.010.