Aartsen MGAckermann MAdams JAguilar JAAhlers MAhrens MAl Samarai IAltmann DAndeen KAnderson TAnsseau IAnton GArgüelles CAuffenberg JAxani SBagherpour HBai XBarron JPBarwick SWBaum VBay RBeatty JJBecker Tjus JBecker KHBenzvi SBerley DBernardini EBesson DZBinder GBindig DBlaufuss EBlot SBohm CBörner MBos FBose DBöser SBotner OBourbeau JBradascio FBraun JBrayeur LBrenzke MBretz HPBron SBrostean-Kaiser JBurgman ACarver TCasey JCasier MCheung EChirkin DChristov AClark KClassen LCoenders SCollin GHConrad JMCowen DFCross RDay MDe André JPAMDe Clercq CDelaunay JJDembinski HDe Ridder SDesiati PDe Vries KDDe Wasseige GDe With MDeyoung TDíaz-Vélez JCDi Lorenzo VDujmovic HDumm JPDunkman MEberhardt BEhrhardt TEichmann BEller PEvenson PAFahey SFazely ARFelde JFilimonov KFinley CFlis SFranckowiak AFriedman EFuchs TGaisser TKGallagher JGerhardt LGhorbani KGiang WGlauch TGlüsenkamp T2018-11-122018-11-1220180031-90071079-7114http://hdl.handle.net/10092/16196We present a measurement of the atmospheric neutrino oscillation parameters using three years of data from the IceCube Neutrino Observatory. The DeepCore infill array in the center of IceCube enables the detection and reconstruction of neutrinos produced by the interaction of cosmic rays in Earth's atmosphere at energies as low as ∼5 GeV. That energy threshold permits measurements of muon neutrino disappearance, over a range of baselines up to the diameter of the Earth, probing the same range of L/Eν as long-baseline experiments but with substantially higher-energy neutrinos. This analysis uses neutrinos from the full sky with reconstructed energies from 5.6 to 56 GeV. We measure Δm322=2.31-0.13+0.11×10-3 eV2 and sin2θ23=0.51-0.09+0.07, assuming normal neutrino mass ordering. These results are consistent with, and of similar precision to, those from accelerator- and reactor-based experiments.en© 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.IceCube CollaborationJournal Article2018-10-31Fields of Research::51 - Physical sciences::5107 - Particle and high energy physics::510703 - Particle physicsField of Research::02 - Physical Sciences::0201 - Astronomical and Space Sciences::020106 - High Energy Astrophysics; Cosmic Rayshttps://doi.org/10.1103/PhysRevLett.120.071801