Other algorithm studies
Read our other algorithm studies for current, future and multi-missions.
30 January 2023
30 October 2018
The capability of ocean colour sensors to provide accurate water-leaving reflectances over high chlorophyll and complex waters, in particular sediment-dominated, relies on accurate and robust Ocean Colour Bright Pixel Correction (OC-BPC). This algorithm removes water-leaving signal in the near infrared (NIR) range of the spectrum in waters where such signal is not negligible, and provides smooth transition to clear oligotrophic waters. Complex waters cover most of global coastal and inland regimes, thus OC-BPC is critical to meeting ocean colour mission requirements and to many applications and data services. The challenge is to decouple any residual water signal in the NIR from the atmospheric path reflectance. This decoupling is required by the standard atmospheric correction which operates with its classical NIR « black pixel » assumption. OC-BPC is based on coupled atmosphere-hydrological models which define the aerosols as well as the inherent optical properties (IOPs) of the water column in the NIR bands.
The main purpose of this study is scientific review and development of the OC-BPC. The correction is being developed for the Copernicus Sentinel-3 Ocean and Land Colour Imager (OLCI) Level-2 products and exploits the capabilities of the OLCI instrument.
The goals of the study are to:
The on-going study is structured under five activities: