Re-Composited High-Quality MODIS-Aqua Remote-Sensing Reflectance Dataset (RCHQMD)

This dataset provides the Re-Composited High-Quality MODIS-Aqua Remote-Sensing Reflectance Dataset (RCHQMD), generated from MODIS-Aqua Level-2 Rrs observations using stringent quality-control criteria before spatial–temporal compositing.Unlike conventional Level-3 ocean-color products that may contain residual low-quality pixels introduced during aggregation, RCHQMD applies multi-metric quality screening at the Level-2 pixel level prior to compositing.

This pre-binning quality-control strategy minimizes spectral contamination caused by low-quality observations while improving the reliability of the resulting global ocean-color data record.The dataset provides daily global Rrs observations at 4-km spatial resolution for six visible wavelengths (412, 443, 488, 531, 547, and 667 nm). It covers the period from 2003 to 2022 and is optimized for large-scale oceanographic, climatological, and marine ecosystem studies, including the retrieval of ocean optical properties and analyses of long-term ocean-color variability.