Fig. 1. Two-dimensional distribution remote measurement system for atmospheric pollutants. (a) Schematic of system integration; (b) schematic of scanning area

Fig. 2. Schematic of “push sweep” imaging by two-dimensional distribution remote measurement system for atmospheric pollutants

Fig. 3. Schematic of field-of-view matching of UV lens

Fig. 4. Schematic of concentration interpolation

Fig. 5. Flowchart of data processing

Fig. 6. Interpolation reconstruction results in different contexts. (a) Situation of isolated high concentration value existing; (b) situation of building occlusion existing

Fig. 7. Interpolation reconstruction results in ship experiment. (a) Situation of isolated high concentration value existing; (b) situation of building occlusion existing

Fig. 8. Schematic of I-DOAS imaging area

Fig. 9. Fitting results of SO₂ spectrum. (a) SO₂ spectral fitting; (b) fitting residuals of SO₂ slanting column density

Fig. 10. Fitting results of NO₂ spectrum. (a) NO₂ spectral fitting; (b) fitting residuals of NO₂ slanting column density

Fig. 11. Two-dimensional distribution map of SO₂ emission from petrochemical flare

Fig. 12. Two-dimensional distribution maps of pollutant emission from chimney mouth. (a) SO₂; (b) NO₂

Fig. 13. Schematic of flux calculation

Fig. 14. Two-dimensional distribution map of SO₂ emission in the second factory

Fig. 15. Fitting results of SO₂ spectrum from ships. (a) SO₂ spectral fitting; (b) fitting residuals of SO₂ slanting column density

Fig. 16. Fitting results of NO₂ spectrum from ships. (a) NO₂ spectral fitting; (b) fitting residuals of NO₂ slanting column density

Fig. 17. Two-dimensional distribution of SO₂ emission when ship heads for shore