Anemometer beam exits reflect, or backscatter, the light back into a detector, where it is measured relative to the original laser beam. When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer. Ultrasonic anemometers, first developed in the 1950s, use ultrasonic sound waves to measure wind velocity. They measure wind speed based on the time of flight of sonic pulses between pairs of transducers. Measurements from pairs of transducers can be combined to yield
What She Does Best other singles charted far outside the Top 40. "How Many Hearts" was the last single Anderson released, and it peaked at No. 69 on the country charts in 1989. The album's cover shows Anderson leaning on a fancy sports car, wearing a classic 1980s outfit. What She Does Best What She Does Best is a studio album by country singer Lynn Anderson, released in 1988. It was her only album with Mercury records. Notable due to featuring her last charting single, "What She Does Best" did not chart and was commercially unsuccessful. It would be her last album for four