Developing Ground Truth Measurement System using RC Helicopter and BRDF Model in Forest Area

摘要

It was difficult to compare the ground truth data to the estimated data using bi-directional reflectance model of vegetative canopy, because most of ordinary measurement systems could not use in forest area except using airplane. This study adopts Radio Control Helicopter (RC Helicopter) as new platform of ground truth measurement, and developed the measurement system, and measured in some forest areas with this system, and compared the measured data to estimated data. As the results, it was made known that the change of VCR (Vegetation Coverage Ratio) of field of sensor view from each angles is most important factor of bi-directional reflectance model in forest area.