*2.8. Spatial Resolution as a Key Parameter for Disease Detection*

Besides the relevant wavelengths, the required spatial resolution or ground sampling distance (GSD) is highly important for the definition of a sensor capable of detecting different wheat diseases in the field. Based on the test and training data sets, simulations were performed where the test data were extracted from subsampled spectra by a factor of 2, 10, 20, and 100. A knn and an aggressive subsampling approach were compared to visualize the effects of different annotation strategies on the F1 score for the detection of YR.

#### **3. Results and Discussion**
