"Field observations" refers to the act of gathering information or data by directly observing and studying something in its natural environment or real-life setting, rather than in a controlled laboratory or controlled conditions. Full definition
At one level, this experimental data squares with field observations. (sciencedaily.com)
The researchers made these findings after conducting field observations over a period of six months between 2009 and 2012. (sciencedaily.com)
The unique mathematical technique described in the study integrates field observations and cloud - resolving models to identify environmental variables important for tropical storm - cloud creation. (pnnl.gov)