Evaluation of SoDAR technology and wind profile extrapolation techniques for modern wind energy applications

Wind energy development requires accurate resource assessment at increasing turbine hub heights. Tall meteorological masts are costly and logistically complex, making remote sensing technologies like SoDAR a practical alternative—provided they are rigorously validated. This study validates a Vaisala Triton SoDAR against a 120 m met mast over 1 year at the Kayathar site in India. Correlation analysis of 10-minute records at 60 m, 90 m, and 120 m revealed strong agreement in wind speed (R 2 > 0.95) and direction (R 2 > 0.99), with minor deviations at greater heights. A comparison of Power Law and Logarithmic Law extrapolation methods showed comparable results below 60 m, but notable divergence above that level, highlighting the need for height-dependent wind shear coefficients. The findings offer practical guidance for wind measurement and prediction, with direct relevance to modern tall wind turbine deployments.