HYPERSPECTRAL REFLECTANCE OF SUB-BOREAL FORESTS MEASURED BY CHRIS/PROBA AND AIRBORNE SPECTROMETER

摘要

The CHRIS Mode 3 scenes of the forest test site Jarvselja, Estonia were atmospherically corrected, and compared to airborne measurements and to model simulations with forest reflectance model FRT. The comparison of CHRIS and airborne data hints that the CHRIS instrument seems to have calibration problems in NIR spectral bands. Updated calibration coefficients of the CHRIS sensor are provided. The revised CHRIS reflectances supported by forestry database and spectral signatures of ground vegetation may serve as a database for the next phase of inter-comparison of radiative transfer models RAMI.