Pegasus XL CYGNSS Rollout. NASA public domain image. Kennedy space center.

At Vandenberg Air Force Base in California, an Orbital ATK Pegasus XL rocket is transported from the hangar at Building 1555 to be mated to L-1011 carrier aircraft near Vandenberg's runway. On board Pegasus are eight NASA Cyclone Global Navigation Satellite System, or CYGNSS, spacecraft. When preparations are competed at Vandenberg, the L-1011/Pegasus XL combination will be flown to NASA’s Kennedy Space Center in Florida. On Dec. 12, 2016, the carrier aircraft is scheduled to take off from the Skid Strip at Cape Canaveral Air Force Station and CYGNSS will launch on the Pegasus XL rocket with the L-1011 flying off shore. CYGNSS satellites will make frequent and accurate measurements of ocean surface winds throughout the life cycle of tropical storms and hurricanes. The data that CYGNSS provides will enable scientists to probe key air-sea interaction processes that take place near the core of storms, which are rapidly changing and play a critical role in the beginning and intensification of hurricanes.