Reflectance comparison between SCIAMACHY and MERIS

In this work we present a comparison of the current SCIAMACHY and MERIS reflectance calibrations at wavelengths between 442 and 885 nm. For that purpose we, firstly, locate all the SCIAMACHY pixels within a given MERIS image and, secondly, we calculate the median and standard deviation of all the MERIS pixels (1000) within each SCIAMACHY pixel. Results show that SCIAMACHY underestimates the reflectance by 13% at 442 nm reaching up to 21% at 885 nm as compared to MERIS.