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NPL - Measurement Protocol

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Objective:

Through a co-located comparison of the measurement of surface radiometric properties of a CEOS reference standard test site by the worlds experts in field spectroscopy measurements:

1) Evaluate differences in field instrument primary calibrations
    a. Reference standards used and traceability (based on "Laboratory" information)
    b. On-site calibrations/validations

2) Evaluate differences in methods for characterising and assigning "radiometric value" to a site, for multiple view angles
   a. Small area for high-resolution imagers
   b. Large area for medium-resolution imagers

3) Establish formal traceability of Tuz Gölü reference site based on an evaluation of all comparison results.

4) Establish "best practice" guidance for above and/or knowledge of variance between methodologies.

5) A multi-sensor (satellite and aircraft) comparison linked to the ground calibration derived from the multi-team comparison.

6) Identify the minimum and ideal specifications for characterisation/instrumentation for a CEOS "reference standard" test site