Remotely Piloted Aircraft Systems
The rapid development of remotely piloted aircraft systems during the last decade has provided new airborne sensor platforms for atmospheric boundary layer research as summarized by Elston et al. (2015). Typically, these systems can provide measurements of Wind speed, Temperature, Pressure, and some Relative Humidity. Depending on the rate of the probe mounted on the remotely piloted aircraft system, many of these platforms have documented capabilities for measuring atmospheric turbulence parameters (Båserud et al. 2016), usually a temperature structure parameter (Thomas et al. 2012; Kroonenberg et al. 2012; Reineman et al. 2013; Wildmann et al. 2013, 2014, 2015; Braam et al. 2016). These systems have been used to measure the wind speed deficits in wind turbine wakes (Kocer et al. 2012; Båserud et al. 2014).