Formaldehyde data, hospital regions, Jan 2019 to Nov 2022

We extracted the formaldehyde (HCHO) data, or Tropospheric HCHO column number density. (unit, mol/m^2 ; with "tropospheric_HCHO_column_number_density " as the band variable) from "COPERNICUS/S5P/OFFL/L3_HCHO" with a user-defined code in Google earth engine system. And we summarized the TROPOMI extracted HCHO data in rds format (R data serialization format). Values were multiplied by 1,000,000 (10^6) to facilitate the extraction process (Final Unit. mol/square millimeter, not mol/square meter) by using the below code "collection = collection.map(function(image) { return image.addBands(image.multiply(1000000).select([0], ['tropospheric_HCHO_column_number_density2'])); });"