Comparison of the 4.3 keV ENA fluxes observed by IBEX in the first halves of 2015, 2016, and 2017 in the upwind hemisphere (top row) with simulation results for the various IBEX energy bands (middle, color coded, averaged over a 20° × 20° region centered on the simulated peak maximum) and the spatial distribution of simulated ENA production rates (bottom); these rates are time-lagged for propagation to Earth (∼6 months in the past at this energy) to match the IBEX maps. We show the surface of the simulation termination shock (TS) and heliopause (HP) in early 2015 in each of the bottom panels (white dashed lines) to show the change in their positions over time.