The growing number of space-borne systems providing Earth Observation (EO) data at higher spatiotemporal and spectral resolutions are allowing for an unprecedented capability to monitor land surface parameters at the global scale. Yet, we are far from fully unleashing the potential of such wealth of EO missions, that are complementary in principle, but inherently diverse in terms of sensor specifications, processing algorithms, and their calibration and validation (Cal/Val) approaches.

To synergistically exploit the information gathered from this fleet of sensors, we must ensure that EO products from different missions are trustworthy and interoperable.  This means that they should be produced with comprehensive and traceable information about their quality, including an uncertainty analysis and the metadata required to characterise and eventually correct for the systematic differences across sensors. 

The critical components for building confidence and enhancing interoperability across EO products are the adequacy and sustainability of the Cal/Val solution, the standardisation of Cal/Val protocols underpinned by metrological best practices and community references.

In this context, the European Space Agency (ESA) in collaboration with the Land Product Validation subgroup (LPV) of the Committee on Earth Observation Satellites (CEOS) Working Group on Calibration Validation (WGCV) are inviting scientists and experts to share the latest results from their on-going research, at the 2023 Workshop on Land Product Validation and Evolution (LPVE23).