Evaluation of Sentinel-3A and Sentinel-3B ocean land colour instrument green instantaneous fraction of absorbed photosynthetically active radiation

This article presents the evaluation of the Copernicus Sentinel-3 OLCI operational terrestrial products corresponding to the green instantaneous FAPAR and its associated rectified channels. These products are estimated using OLCI spectral measurements acquired at the top of the atmosphere by a physically-based approach and are available operationally at full (300 m) and reduced (1.2 km) spatial resolution daily. The evaluation of the quality of the FAPAR OLCI values was based on the availability of data acquired over several years by Sentinel-3A (S3A) and Sentinel-3B (S3B). The evaluation exercise consisted of several stages: first, an overall comparison of the two S3 platform products was carried out during the tandem phase; second, comparison with an FAPAR climatology derived from the MERIS provided information on the seasonality of various types of land cover. Then, direct comparisons were made with the same type of FAPAR products retrieved from two sensors, the MODIS and the S2 MSI, and with several ground-based estimates. In addition, an analysis of the efficiency of the retrieval algorithm with 3D radiative transfer simulations was performed.

GOBRON Nadine;  MORGAN Olivier;  ADAMS Jennifer;  BROWN Luke Ashley;  CAPPUCCI Fabrizio;  DASH Jadunandan;  LANCONELLI Christian;  MARIONI Mirko;  ROBUSTELLI Monica; 

2022-01-03

ELSEVIER SCIENCE INC

JRC127637

0034-4257 (online),   

https://www.sciencedirect.com/science/article/pii/S0034425721005708?via%3Dihub,    https://publications.jrc.ec.europa.eu/repository/handle/JRC127637,   

10.1016/j.rse.2021.112850 (online),