Fig. 1From: Continuous multi-component MAX-DOAS observations for the planetary boundary layer ozone variation analysis at Chiba and Tsukuba, Japan, from 2013 to 2019Locations of the MAX-DOAS observation sites in this study (Chiba and Tsukuba, Japan). The lines with arrows represent the lines of sight for each MAX-DOAS instrument. The length of the lines represents a typical observation spatial scale of 10 kmBack to article page