Surface radiation and energy budget calculations. Verification and validation of models and satellite derived data. 100 km Point meas. Horizontal resolution is not specified, but assumed to be similar or the same as PAR and FPAR etc. For surface based observations, point measurements should be representative of several km2.
Specifications differ with application and sometimes with existing observational capability.
For FPAR a 30 km resolution is specified as a requirement for terrestrial global applications. Scientifically consistent specifications need to be developed. The above Table identifies page numbers in the reference documents used to extract requirements specifications. Spectral measurements are extremely limited, though needed. Long wave components are not measured in too many sites and not exchanged.