Joshua S. DillonMax LeeZaki S. AliAaron R. ParsonsNaomi OroszChuneeta Devi NunhokeePaul La PlanteAdam P. BeardsleyNicholas S. KernZara AbdurashidovaJames E. AguirrePaul AlexanderYanga BalfourBERNARDI, GIANNIGIANNIBERNARDITashalee S. BillingsJudd D. BowmanRichard F. BradleyPhil BullJacob BurbaSteve CareyChris L. CarilliCarina ChengDavid R. DeBoerMatt DexterEloy de Lera AcedoJohn ElyAaron Ewall-WiceNicolas FagnoniRandall FritzSteven R. FurlanettoKingsley Gale-SidesBrian GlendenningDeepthi GorthiBradley GreigJasper GrobbelaarZiyaad HaldayBryna J. HazeltonJacqueline N. HewittJack HickishDaniel C. JacobsAustin JuliusJoshua KerriganPiyanat KittiwisitSaul A. KohnMatthew KolopanisAdam LanmanTelalo LekalakeDavid LewisAdrian LiuYin-Zhe MaDavid MacMahonLourence MalanCresshim MalgasMatthys MareeZachary E. MartinotEunice MatsetelaAndrei MesingerMathakane MolewaMiguel F. MoralesTshegofalang MosianeSteven MurrayAbraham R. NebenBojan NikolicRobert PascuaNipanjana PatraSamantha PieterseJonathan C. PoberNima Razavi-GhodsJon RinguetteJames RobnettKathryn RosieMario G. SantosPeter SimsCraig SmithAngelo SyceMax TegmarkNithyanandan ThyagarajanPeter K. G. WilliamsHaoxuan Zheng2022-03-222022-03-2220200035-8711http://hdl.handle.net/20.500.12386/31765In 21 cm cosmology, precision calibration is key to the separation of the neutral hydrogen signal from very bright but spectrally-smooth astrophysical foregrounds. The Hydrogen Epoch of Reionization Array (HERA), an interferometer specialized for 21 cm cosmology and now under construction in South Africa, was designed to be largely calibrated using the self-consistency of repeated measurements of the same interferometric modes. This technique, known as "redundant-baseline calibration" resolves most of the internal degrees of freedom in the calibration problem. It assumes, however, on antenna elements with identical primary beams placed precisely on a redundant grid. In this work, we review the detailed implementation of the algorithms enabling redundant-baseline calibration and report results with HERA data. We quantify the effects of real-world non-redundancy and how they compare to the idealized scenario in which redundant measurements differ only in their noise realizations. Finally, we study how non-redundancy can produce spurious temporal structure in our calibration solutions--both in data and in simulations--and present strategies for mitigating that structure.STAMPAenRedundant-Baseline Calibration of the Hydrogen Epoch of Reionization ArrayArticle10.1093/mnras/staa3001WOS:000599131700085https://academic.oup.com/mnras/article/499/4/5840/5917098http://arxiv.org/abs/2003.08399v22020MNRAS.499.5840DFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation