The mission of the CEOS Working Group on Calibration & Validation (WGCV) is to ensure long-term confidence in the accuracy and quality of Earth Observation data and products and to provide a forum for the exchange of information about calibration and validation, including the coordination of cooperative activities.
Calibration is the process of quantitatively defining a system’s response to known and controlled signal inputs. Validation, on the other hand, is the process of assessing, by independent means, the quality of the data products derived from those system outputs.
WGCV addresses the need for standardising the ways that different data sources are combined to ensure interoperability among existing and future Earth Observing systems. WGCV promotes the international exchange of technical information and documentation, joint experiments, and the sharing of facilities, expertise, and resources. This makes WGCV the focal point for all things related to calibration and validation in the international user community. The WGCV Subgroups also conduct many activities around specific topics and sensor types.
International Cal/Val Networks
RadCalNet (Radiometric Calibration) | SARCalNet (SAR Calibration) | HYPERNETS (Hyperspectral Surface Reflectance) | TIRCalNet (Thermal Infrared Calibration) | Product Validation Platform (PVP) |
CEOS Cal/Val Portal
The Cal/Val portal is WGCV’s primary forum for information exchange. It offers the Earth observation community access to reference data, networks, and internationally agreed protocols. By providing reliable Cal/Val resources, the portal supports data interoperability and performance assessment within a CEOS-coordinated infrastructure following QA4EO principles.
Calibration sites
Tools
Projects
For more information about the overall mission and objectives of the WGCV, view the WGCV Terms of Reference. Information about current and upcoming WGCV activities are outlined within the overall CEOS 3-Year Work Plan.
For more information or to be added to the WGCV mailing list, please reach out to us via the Contacts page.
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RadCalNet Storymap – Visual tour of sites |
 SARCalNet Storymap – Visual tour of sites |
