WINDCRANE is designed to comply with the IEC-61400, which are the specs for wind turbine standards.
Why the IEC-61400? Because they have one of the highest standards for measuring wind speed on and off site. These are better than 1% accuracy and a resolution better than 0.1m/s, also data should be sampled at least at 1Hz.
WINDCRANE accuracy is better than 0.001% for its wind speed input sensors at low wind speeds and better than 0.007% accurate for high wind speeds.