Replication data for: Accuracy assessment on the number of flux terms needed to estimate in situ fAPAR

Preprocessed data of permanent (year 2016) FAPAR observations (two-, three- and four-flux) using Wireless Sensor Networks (WSNs) and observations of wind speed, leaf color, snow coverage and season at three forest sites: The North American "Peace River Environmental Monitoring Super Site" ("Peace River") in Northern Alberta, Canada with a boreal-deciduous forest; the Central American "Santa Rosa National Park Environmental Monitoring Super Site" ("Santa Rosa") in Guanacaste, Costa Rica with a tropical dry forest (TDF); the Central European site "Graswang" as part of the TERENO network (Terrestrial Environmental Observatories) at Graswang in Bavaria, Germany with a mixed-coniferous forest.