One part of the science preparation and EnMAP mission support project led by the German Research Centre (GFZ) Potsdam, is the validation of the official EnMAP product regarding their quality. This validation has to be performed independently from the data quality control activities performed by the Ground Segment at DLR EOC. The validation tasks, sites and goals are defined in the Product Validation Plan (PVP) which has been prepared by GFZ and collaborators of the EnMAP Cal/Val Team. To comply with the PVP, the radiometric, spectral, geometric, reflective, and general quality of the three official EnMAP products (L1B, L1C and L2A) must be validated periodically and on-demand during the commissioning and nominal phase. The three official data products which have to be validated are:

• L1B Product: radiometrically-corrected & spectrally-characterized radiance data
• L1C Product: geometrically-corrected L1B data
• L2A Product: atmospherically-corrected L1C data

Each of the three products is validated based on a set of parameters that define and represent the quality of the data. Some validation procedures are ground-based and therefore compare in-situ data provided by dedicated validation core sites, well-established validation/calibration networks and international collaborators. Other validation procedures are scene-based and thus can be performed on a set or a single EnMAP scene without the use of reference data.