Validation of remote sensing reflectance and aerosol optical thickness products of MODIS based on the fixed offshore platform observations

Remote sensing reflectance (Rrs) from the HyperSAS and aerosol optical thickness (AOT) from CE318 on the PY30-1 oil platform which is in the northern of the South China Sea are used to validate the Rrs of 412, 443, 531, 547 nm bands and AOT of 869 nm from moderate resolution imaging spectroradiometer (MODIS) sensor (Aqua and Terra). The results of Rrs show that the observation data values from the site are higher than the satellite, but the consistence between them is good. The average relative deviations of the 443 nm channel of Terra satellite, 412 nm and 443 nm channels of Aqua are better than 10%. The results of AOT show that the field and satellite observations are in good agreement with each other. The results of Aqua are better than the Terra satellite; the average relative deviations of them are less than 10%: for the Aqua satellite it is -0.181%, and for the Terra satellite it is about 8%. remote sensing; fixed offshore platform; remote sensing reflectance; atmosphere aerosol; moderate resolution imaging spectroradiometer; validation