The rate coefficient for the reaction O+ + N2→NO+ + N is determined as a function of temperature from the photochemistry of NO+ for both day and night conditions by using a large sample (>5300) of simultaneous measurements of ion and neutral concentrations and temperatures made by the Atmosphere Explorer C satellite. The results cover the ion temperture range 500--1200¿K and can be represented by 1.2¿10-12(Ti/300)-0.8 cm3 s-1. Using recent flow drift tube results, we calculate the rate coefficient as a function of ion temperature and mean ion drift velocity for ionospheric conditions and find that the satellite and laboratory determinations are in good agreement. Using this temperature dependence, we then refine our earlier determination of the dissociative recombination coefficient of NO+ with electrons. We confirm that this rate coefficient is represented by 4.2¿10-7(Te/300)-0.85 cm3 s-1.