The Collection Sentinel 2 albedo is a set of products, which corresponds to the DHR at the satellite's overpass time. The method is recurrent and sets weights between an a priori albedo and an albedo updated by the last valid observation, in order to create spatially and temporally coherent images free of gaps.

Albedo is an Essential Climate Variable (ECV) involved in the water and carbon cycles. It is available in the following forms:

• Spectral albedos (original sensor bands or broad bands: VIR, PIR, solar)
• Directional-Hemispherical Reflectance (DHR): for a chosen solar geometry
• Bi-Hemispherical Reflectance (BHR): for a solar geometry integrated over the day
• ‘Blue sky’ albedo (combines DHR and BHR using a weighting based on the diffuse radiation fraction)

Region: Metropolitan France
Year: 2022 (2024, 2025 in processing)
Spatial Resolution: 10 m
Product Maturity Status: The algorithm to generate the Sentinel 2 albedos is operational and is an adaptation of previous methods used to generate similar low-resolution albedos from Meteosat and PROBA-V images.

For more details on the methodology and validation, please refer to the associated publication Roujean & al., 2018^[1]

The products are under the open source license Creative Commons License - Attribution Non Commercial 4.0 International (CC-BY-NC 4.0)

The collection is disseminated using FAIR principles by the DATA TERRA Research Infrastructure (Continental Surfaces Data Hub – THEIA) through the diffusion service CDS-MTD (https://browser-theia.stac.teledetection.fr/) hosted at Maison de la Télédétection.