Accountant supermarket manager gabapentin 600 mg pris flashback In order to measure hurricane wind speeds using the standard method, scientists drop a 16-inch-long tube packed with scientific instruments called a dropsonde. These dropsondes are attached to small parachutes and jettisoned from airplanes, gathering information during their descent. Each device measures pressure, humidity and temperature in addition to wind speed. A typical Hurricane Hunter mission uses about 20 single-use dropsondes, each costing around $750.