Measurement Uncertainties of the NCAR Air Motion Systems

Table 3 contains the details of the random and systematic error values and the calculated measurement uncertainties at the 95% confidence level.

An opportunity to compare the aircraft system air motion system with the ground based NOAA Profiler at Medicine Bow, WY provided a limited data set from which the lessons learned will be helpful with future intercomparison planning. At several levels, the wind direction is well within the expected uncertainty and, in general, the Profiler wind speeds are higher by 2-3 m/s than the aircraft system. The directional differences increase as the speed decreases - which is expected from the directional uncertainties.