Fig. 5

Spatial distribution of a-priori and a-posteriori \(\:\text{N}{\text{H}}_{3}\) concentrations constrained for May (left column), June (middle column), and July (right column) for different satellites in 2019. The first row presents prior concentrations, the second row shows posterior concentrations constrained by IASI, the third row shows the same constrained by CrIS, and the fourth row shows the same constrained by the combination of IASI/CrIS. The calculations, as well as the maps, were produced with a Python (3.9.5) script (https://www.python.org/downloads/release/python-395/).