Fig. 1. EMIT coverage and total observations for simulated 1-year mission.

(A) EMIT observation mask shown in white relative to bottom-up methane inventory (56) and locations of power plants with ≥500-MW capacity shown in blue (58). The inlay stacked histogram shows ≥500-MW power plants that will be observed with EMIT and associated revisits for the 1-year primary mission for non–Annex I (dark blue) and Annex I (light blue) countries. EMIT should complete its primary mission by September 2023, and in the planned extended mission, any terrestrial region between the dashed lines (+51.6° and −51.6° latitude) could be targeted. (B) Total observations and average revisit interval for nominal 1-year mission.