Abstract: The theory of the measurement of wind velocity by sonic meansis presented. Two methods are discussed for determination of the rectangular components of the wind vector by use of the sonic principle. The response characteristics ...

Abstract: An investigation by modeling techniques has been made of the collision between cloud drops of equal size in the diameter range from 11 to 22 microns. It was found that such drops will collide with an initial vertical ...

Abstract: tract

Abstract: The optical characteristics of a newly designed two-step pyranometer head are described. The head is suitable for use in the spectral range 400-720 nm. It is characterized by a cosine error which is less than 1.5% over the ...