E Gulf of GLPG-3221 Autophagy witness aand Pearl River Delta in June. Fourth, the Bei- of Bengal plus the coasts nearby Tonkin high concentration in September. Third, the Bay Bengal and the coasts nearby witness a (BTH) concentration in September. but massthe jing-Tianjin-Hebei Urban Agglomeration high has no rainforest distribution Fourth, Beijing-Tianjin-Hebei Urban Agglomeration contribute no a high HCHO concentration population and economic activities, which (BTH) has to rainforest distribution but mass population and economic [55]. The concentration there reached itsHCHO concentration by way of most of the year activities, which contribute to a higher maximum in 2019 by means of September. year [55]. The concentration there reached its maximum in 2019 around the majority of the about September.Remote Sens. 2021, 13, 4055 Remote Sens. 2021, 13, x FOR PEER REVIEW15 of16 of(a)(b)(c) (d) Figure 13. GNE-371 DNA/RNA Synthesis surface concentration of HCHO in Indo-Pacific region in some common months: (a) March; (b) June; (c) Figure 13. Surface concentration of HCHO in Indo-Pacific area in some common months: (a) March; (b) June; (c) September; September; (d) December. (unit: g/m3).(d) December. (unit: /m ).4. Discussion 4.four.1. Improvements and Innovativeness Discussion four.1. Improvements and Innovativeness It truly is clear that the worldwide surface distribution of HCHO with point and interval estiIt is clear that the worldwide successfully by utilizing HCHO with point and interval demation is in a position to become obtainedsurface distribution ofneural network models like thoseestimation is able to become To show the improvement of Sentinel-5P in pollutant health estimation, scribed above. obtained successfully by using neural network models like these described above. To show the improvement of Sentinel-5P in pollutant well being estimation, the pointRemote Sens. 2021, 13,Remote Sens. 2021, 13, x FOR PEER REVIEW16 of17 othe point estimation model was applied to each Sentinel-5P VCD data and OMI VCD destimation model was applied to each Sentinel-5P VCDAmerica, two points can befor July the co for July 2019. Zooming in around the view of information and OMI VCD data noticed from 2019. Zooming in around the view of America, two factors is usually noticed from the comparison. parison. Initially, Sentinel-5P is far significantly less disturbed bydisturbed by noisesatellite trail. This was was p Very first, Sentinel-5P is far much less noise along the along the satellite trail. This cisely the goal from the Sentinel-5P ahead of its launch its launch [56]. The improvemen precisely the aim in the designers of designers of Sentinel-5P before[56]. The improvement signal-to-noise ratio is nicely illustrated illustrated by of signal-to-noise ratio in TROPOMIin TROPOMI is wellby Figure 14. Figure 14.(a)(b)Figure 14. (a) Average surface distribution of HCHO more than the U.S. in July 2019, derived from Sentinel-5P data; (b) Average Figure 14. (a) Typical surface distribution of HCHO more than the U.S. in July 2019, derived from Sentinelsurface distribution of HCHO over the U.S. in July 2019, derived from OMI data (unit: g/m3).5P information; (b) Average surface distribution of HCHO more than the U.S. in July 2019, derived from OMI data (unit: /m3 ). Second, while Sentinel-5P and OMI typically give the exact same distribution treSecond, while Sentinel-5P and OMI normally give exactly the same distribution trend, slightly larger concentration levels in VCD information, as is shown in Figure 15. In shown ar Sentinel-5P shows an towards the non-linear character HCHO. This could be attributed for the slightly due naturally greater level of from the.