Transition probabilities for the second negative band system of O+2 are computed using the dipole transition moment presented by Wetmore et al. [1984>. Vibrational levels v'=0--54 of the X 2&Pgr;g ground state and v'=0--33 of the excited A 2&Pgr;u state are included. Franck-Condon factors for ionization-excitation of O2 (X 3&Sgr;-g v=0--25) to O+2(A 2&Pgr;u; v;=0--33) are also presented. ¿ American Geophysical Union 1990