URL: https://www.researchgate.net/publication/346259260/figure/fig3/AS:1022338501992456@1620755901756/Demonstration-of-the-MAX-DOAS-principle-a-side-view-and-b-top-view-Simplified.ppm
URL2: https://www.researchgate.net/figure/Demonstration-of-the-MAX-DOAS-principle-a-side-view-and-b-top-view-Simplified_fig3_346259260
