Abstract: A prototype of an ultrasonic thermoanemometer, specially designed for aircraft measurements, has been developed. By measuring the transit time of ultrasonic pulses, one can deduce the speed of sound and then the air ...

Abstract: An instrument for measuring the size and concentration of droplets is described. It has the ability to function in calm and low wind conditions. Droplets in the 5?50 ?m diameter range are detected optically. The data ...