CEOS WGCV IVOS Calibration and Validation Framework

CEOS WGCV IVOS is the Infrared and Visible Optical Sensors Subgroup, the international sensor-level calibration and validation protocol authority for VNIR, SWIR, and TIR optical EO instruments. It defines Pseudo-Invariant Calibration Sites, inter-sensor cross-calibration protocols, and vicarious calibration best practices that anchor radiometric harmonisation across hyperspectral missions including PRISMA, EnMAP, EMIT, and HISUI.