With many years of multi-scale optical system geospatial and radiometric calibration and characterization experience, the EROS Cal/Val Center of Excellence (ECCOE) is a global leader in performing traceable measures of accuracy and assessing data quality to support credible science. ECCOE works with partners worldwide to extend Landsat “gold standard” processes and information evaluation techniques to further product harmonization and interoperability.
https://www.usgs.gov/land-resources/eros/calval
2019 Joint Agency Evaluation Land Remote Sensing Compendium.