"Field measurements" refers to the collection of data or information by directly observing or measuring things in their natural environment or real-life settings, rather than in a controlled laboratory or simulated environment. Full definition
However, while field measurements of sulfur dioxide emissions are increasing, they still remain too sparse to piece together a cohesive global picture. (sciencedaily.com)
The aim of this study was to illustrate the minimum number of measurements needed to determine annual mass balance accurately from field measurements alone. (nichols.edu)
The researchers used field measurements, satellite images and empirical models to come up with their results. (environmentalresearchweb.org)