Highest Quality Remote Sensing Reflectance Database Compiled from 20+ years of MODIS-Aqua measurements

This database provides rigorously screened, highest-quality remote sensing reflectance (Rrs), spectra from the MODIS Aqua sensor at 4 km spatial resolution, covering seven wavelengths (412 nm, 443 nm, 488 nm, 531 nm, 547 nm, 667 nm, and 678 nm). It includes both 8-day and monthly composite products. The data are screened using CHQR (Criteria of the Highest-Quality Rrs) to have the selected Rrs spectrum meet the following conditions simultaneously:

l  Optimal observation conditions (excluding clouds, sun glints, etc.)

l  Spectral consistency with true water optical properties

l  Minimal residual uncertainties