Lein, Susan2015-11-092015-11-092015-09https://hdl.handle.net/11299/175526University of Minnesota Ph.D. dissertation. September 2015. Major: Physics. Advisor: Kenneth Heller. 1 computer file (PDF); xiv 500 pages.The NOvA experiment studies neutrino oscillations in the NuMI neutrino beam from Fermilab. NOvA consists of two liquid scintillator tracking calorimeters placed 14 milliradians off-axis from the beam and 810 km apart. The NOvA experiment started taking data in 2014. This thesis establishes the neutrino energy estimation procedures used to determine the oscillation parameters $\sin^2 \theta_{23}$ and $\Delta m_{32}^2$.enneutrinoNOvAoscillationThesis or Dissertation