Subgroups

The CEOS Working Group on Calibration & Validation (WGCV) supports six subgroups that operate as individual entities and focus on specific technical areas related to calibration and validation. The WGCV subgroups are as follows:

Atmospheric Composition (ACSG) Mission: to ensure the accurate and traceable calibration of remotely-sensed atmospheric composition radiance data and validation of higher level products for application to atmospheric composition, land, ocean, and climate research. Terms of Reference Chair: Jean-Christopher Lambert (BIRA-IASB) Relevant publications – Best Practice Protocol For The Validation Of Aerosol, Cloud, And Precipitation Profiles	Infrared Visible Optical Sensors (IVOS) Mission: to ensure high quality calibration and validation of infrared and visible optical data from Earth observation satellites, as well as the validation of higher level products. Terms of Reference Chair: Nigel Fox (NPL) Cal/Val Portal webpage Relevant publications – Good Practice Guidelines for UAV-based Surface Reflectance Validation – Recommendation on use of a solar Irradiance spectrum for EO applications	Land Product Validation (LPV) Mission: to foster the quantitative validation of higher-level global land products derived from remote sensing data and to relay results so they are relevant to users. Terms of Reference & 2026-2029 Work Plan Chair: Fabrizio Niro (ESA) LPV Website Relevant Publications – Land Product Validation Protocols Update of CEOS-WGCV LPV Supersites V2
Microwave Sensors (MSSG) Mission: to foster high quality calibration and validation of microwave sensors for remote sensing purposes. These include both active and passive types, airborne and space-borne sensors. Terms of Reference Chair: Xiaolong Dong (CAS) Cal/Val Portal webpage	Synthetic Aperture Radar (SAR) Mission: to foster high-quality synthetic aperture radar data from airborne and space-borne systems through precision calibration in radiometry, phase and geometry, and validation of higher level products. Terms of Reference Chair: Dirk Geudtner (ESA) Cal/Val Portal Webpage	Terrain Mapping (TMSG) Mission: to ensure that characteristics of digital terrain models produced from Earth observation sensors at global and regional scales are well understood and that products are validated and used for appropriate applications. Terms of Reference Chair: Peter Strobl (EC-JRC) Relevant publications – The Digital Elevation Model Intercomparison eXperiment DEMIX, a community-based approach at global DEM benchmarking – Digital Elevation Models: Terminology and Definitions