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## Equation A1-1. Emission Calculation for Each Aircraft Type for One LTO 

Total aircraft emissions are then estimated by applying Equation A1-2 ( Emission Calculation for All Aircraft ), which multiples the aircraft emissions per LTO for a given aircraft type. 

Where: 

## Equation A1-2. Emission Calculation for All Aircraft 

E$_{i }$= total emissions of pollutant i, expressed in pounds, produced by all aircraft operating in the region of interest E$_{ij }$= total emissions of pollutant i, expressed in pounds, produced by aircraft type j for one LTO cycle LTO$_{j }$ = total number of LTO cycles for aircraft type j (where j covers the range of aircraft operating in the area) during the inventory period i = pollutant type (e.g., NOx, CO, or VOC) j = aircraft type (e.g., 737-900) 

