The nominal spatial resolution of OMPS-NM is 50 km × 50 km at nadir in the nominal observation mode.But at the edge of the swath, the pixel area will increase. and I tested it by 50 km × 50 km and compared it with the data on this website(https://so2.gsfc.nasa.gov/pix/special/2022/hunga/hunga_ompspca_so2stl_20220114.html), and the results were quite different.
Then,how can i obttain the area of each pixel for the OMPS SO2 product. how about TROPOMI SO2 product?
"Both the OMPS and TROPOMI products do have variables that define the pixel coordinates in latitude and longitude. In OMPS these are /GeolocationData/LatitudeCorner and /GeolocationData/LongitudeCorner and in TROPOMI these are /PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds and /PRODUCT/SUPPORT_DATA/GEOLOCATIONS/longitude_bounds. These coordinates can be used to calculate individual pixel areas."