Observations of turbulent fluxes

In the summer of 1968, scientists at the Air Force Cambridge Laboratories in Bedford, Massachusetts, conducted a surface-layer experiment over a very flat, uniform site in southwestern Kansas . . . The Kansas experiment saw the first systematic application of tower-based sonic anemometry and computer-controlled data acquisition in a field experiment . . . The statistical relationships developed from these measurements, both spectral and time-averaged, have since been tested and compared by many experimenters, and possible inconsistencies have been discussed at length in the literature, but the basic structure revealed by the two experiments remains substantially unchanged.Kaimal and Wyngaard (1990)