Two levels of triple hot film and sonic anemometers were deployed on a 5.5m tower during the Cooperative Atmospheric Surface Exchange Study (CASES-99) in October 1999. Each triple hot film probe was mounted 5cm from the sonic sensing path on a common boom. Various procedures were addressed to resolve wind components from data affected by problems using triple hot film anemometers in the open atmosphere. Stable boundary layer wind vector magnitudes, turbulent kinetic energies (TKE), sensible heat fluxes, and surface stresses measured by the two different sensors are compared.