Sensitivity Analysis for Sensible Heat Flux from a Mixed Plantation Using LAS Measurements in Hilly Zone of North China Effect of high voltage wire electromagnetic field intensity on Large Aperture Scintillometer (LAS) observation Comparative advantages of Large Aperture Scintillometer and Eddy Covariance instrument for measuring evapotranspiration in irrigated farmlands The feasibility of using LAS measurements of the turbulence structure parameters of temperature above a forest canopy