Hurricane track forecast accuracy has improved since 1990, but there has been little improvement in intensity forecast accuracy. A new NASA mission using eight micro-satellites will make accurate measurements of ocean surface winds in and near the eye of the storm throughout the lifecycle of tropical cyclones, typhoons & hurricanes. The Cyclone Global Navigation Satellite System (CYGNSS) will probe the inner core of hurricanes to learn about their rapid intensification. The mission will launch on Nov. 21, 2016, from Cape Canaveral Air Force Station, Florida, on a Pegasus XL rocket. The University of Michigan is developing CYGNSS.