*1.3. Research Questions*

Given the importance of ET in water management generally, and the potential uncertainty of EOS ET estimation for large seemingly homogeneous cropping areas with temporal variance, we explored several research questions to help parameterize the spatiotemporal uncertainty of EOS ET estimation using sUAS RSE. Answers to these research questions can provide practitioners valuable qualifiers of uncertainty as EOS ET estimates are now more routinely used in determining irrigation volumes and scheduling. Through cross-platform comparisons, we asked:

