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 Does the K Stand For? What Does the K Stand For? What Does the K Stand For? is a BBC Radio Four sitcom series based on the experiences of comedian Stephen K. Amos growing up as a teenager in south London in the 1980s. The broadcast of the first series began in November 2013; the third series commenced in January 2017. Reviewing Series 1, Episode 1 for "Radio Times", Tristram Fane Saunders found the show suited Amos "down to the ground; there's a touch of "Seinfeld" about "What Does the K Stand for?" in the way it flows from stand up into a deliciously awkward