Sonde winds vs. Real-time airborne Doppler winds
Mean  radial wind difference (sonde - Doppler) = -6.7 m/s
Mean tangential wind difference (sonde - Doppler) = -1.5 m/s
Mean wind-speed difference (sonde - Doppler) = -0.4 m/s
RMS radial wind difference = 13.6 m/s
RMS tangential wind difference = 7.5 m/s
RMS wind-speed difference = 6.4 m/s
Note:  Nearly all sondes available for comparison were dropped near the eyewall wind max (the toughest location for comparison because of high wind variability.)