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MULTITEMPORAL COMPARISON OF LANDSAT TM DATA WITH IN-SITU 
REFLECTANCE MEASUREMENTS 
Thomas Ruwwe 
FAW (Research Institute for Applied Knowledge Processing) 
P.O. Box 2060, D-7900 Ulm 
ABSTRACT 
A set of 10 multedate Landsat TM Data acquired during the growing seasons of 1986-1988 has been analyzed 
to show the influence of phenological development on the spectral response of winter wheat and sugar beets 
and its natural variation in a strdy area located between Bonn and Dologne. The comparison of this data (TM- 
bands 1-5) with simultaneously measured spectral reflectance data, gathered by a high resolution spectro 
reflectometer (0,4-2,2 pm) documents the influence of several atmospheric effects. The interference of various 
atmospheric conditions such as haze, fog, cirrus, and cumulus clouds with the spectral response of vegetation 
is described and discussed.