A Mesonet is a network of automated weather and environmental monitoring stations designed to observe localised meteorological phenomena. An Observator automatic weather station network provides accurate climatological information (to WMO weather standards), which can also be used to prevent the occurrence of crop damage resulting from spray drift.

An Observator Mesonet System provides a fully integrated weather monitoring and warning system, which can be used to provide highly accurate and targeted data on the development and presence of adverse conditions for crop spraying.