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 Kate Does that it by no means compared to "LA X", but stated that it "contain[ed] scenes of incredible beauty, based on character work and stakes earned over five seasons [that] made it a fine, if imperfect, hour." McGee also commented that the scene in which Claire arrives at the hospital and is helped by Ethan as "freakin' outstanding" and called "What Kate Does" "one of the funniest in the show's history. Aldo, Hurley, and Miles all got off plenty of zingers, which will be necessary in a season in which both mythological and dramatic stakes are raising higher and higher each