Video: Delta 4 lifts off

Rocket Lab’s Electron booster launched six small satellites and a drag sail demonstrator to orbit Sunday from New Zealand, a success on the company’s first commercial mission that officials said should pave the way for a launch carrying NASA CubeSats next month and up to 16 flights of the light-class rocket next year.

A detached electrical connector on the second stage of Rocket Lab’s Electron rocket caused a failure on a July 4 mission that destroyed seven small commercial satellites, but the company said Friday it is on track to resume launching before the end of August.

The next satellite for the U.S. military’s communications network, this one purchased by five international allies, has arrived in Florida for its launch in March atop a Delta 4 rocket.