1. ARD Uncertainties WGCV Plenary # 43 Sao Jose dos Campos, Brazil
April 10-13, 2018

2. Analysis Ready Data RI MRI Products S2 Level 1b product ARD
S2 Level 2 SR product
CARD4L
S2 Level 2 SR product with general and pixel level metadata aligned with CARD4L PFS
Product
Family
Harmonised
Product
S2 CARD4L SR product using harmonised geo/ atmospheric algorithms and references (e.g. HLS)

3. Uncertainty and Traceability
Definitions
The term “’uncertainty of measurement’” denotes a “parameter,
associated with the result of a measurement, that characterises the dispersion of the values that could reasonably be attributed to the measurand (GUM).”
‘Traceability’ is defined as the “property of the result of a measurement or the value of a standard whereby it can be related to stated references, usually national or international standards, through an unbroken chain of comparisons all having stated uncertainties” (ISO)

4. Uncertainty How, what and at which level? Characterising uncertainty
Presenting uncertainty information
At what level (scene, tile, pixel)

5. Uncertainty Satellite based surface reflectance
Sources of uncertainty:
Sensor
Correction approaches
Ancillary input data

6. Uncertainty Field measurement of surface reflectance
Sources of uncertainty:
Instruments
Operator techniques
Target surface
Measurement approach
Environment