ESA Ozone CCI GTO-ECV Level-3 Total Ozone

ESA Ozone CCI GTO-ECV Level-3 Total Ozone is an ESA Climate Change Initiative climate data record for merged total ozone analysis ^[1]. The product combines observations from GOME, SCIAMACHY, OMI, GOME-2A, GOME-2B, GOME-2C, and TROPOMI, giving users a multi-instrument ozone record rather than a single-mission product ^[1]. It provides monthly global coverage on a 1 degree by 1 degree grid from 1995 to present, which supports long-term ozone trend monitoring and climate-scale comparison workflows ^[1]. Access is open through ESA Climate Change Initiative project archives, making the product suitable for users who need a documented total ozone essential climate variable record ^[1].