Rocket Lab’s second Electron booster lifted off from New Zealand’s North Island on Saturday, U.S. time, and reached orbit after an eight-minute climb over the Pacific Ocean. Liftoff with three commercial CubeSats occurred at 8:43 p.m. EST Saturday (0143 GMT; 2:43 p.m. New Zealand time Sunday).

Technicians began the painstaking work of assembling a powerful Atlas 5 rocket today, a launcher that will deploy an advanced satellite to substantially improve U.S. weather forecasting.

United Launch Alliance workers encapsulated the freighter on Wednesday with the 14-foot-diameter, 45-foot-long extra extended payload fairing (XEPF) at Kennedy Space Center’s Payload Hazardous Servicing Facility.