“…The unscheduled departures were extracted and the flight trajectories were optimised for least fuel burn in the APMI, so the mission fuel burn estimate in this study is found to be 18% [30], and Chèze et al [32], respectively because of the lower fuel burn, and slightly (5%) higher EI SO x (0.84 g/kg in this study vs 0.8 g/kg in Kim et al [29]) used in the calculation. The estimates of the emissions of CO, HC, and NO x are found to be higher in this work compared with those in Simone et al [33], by 4%, 40%, and 26%, respectively, in Kim et al [29], by 42%, 300%, and 17%, respectively, in Wilkerson et al [30], by 9%, 140%, and 30%, respectively, and in Chèze et al [32], by 7%, 133%, and 19%, respectively.…”