The US Dept of Energy supported an experiment, XPIA, to assess the ability of current instrumentation to measure wind farm flows (Lundquist et al. BAMS 2017). This dataset allowed for detailed investigations of the performance of radiometers (Bianco et al. AMT 2017 ), scanning lidars (Choukulkar et al. AMT 2017, Debnath et al. AMT 2017a) and their uncertainty (Newsom et al. AMT 2017), comparisons of scanning lidars with dual-Doppler radar (Debnath et al. AMT 2017b), and even meteorological tower wakes (McCaffrey et al. AMT 2017). Data from the XPIA campaign may be downloaded from https://a2e.energy.gov/projects/xpia. We have assessed lidar capabilities for measuring wind turbine wakes (Bodini, Zardi, and Lundquist 2017 AMT), quantified measurement strategies for airborne lidar measurements (Gasch et al. 2020 AMT), and developed a lidar simulator (Robey and Lundquist 2022 AMT, in press) and lidar error assessment tool that is now in use for designing upcoming field experiments (Sanchez Gomez et al., 2022, in review at JRSE).