DigitalGlobe’s WorldView 4 commercial satellite, which will join sister-craft WorldView 3 in orbit to snap the highest quality Earth imagery available on the market at 31-centimeter resolution, was built by Lockheed Martin and will be launched Friday atop an Atlas 5 rocket from Vandenberg Air Force Base, California.

Follow the major events of the Atlas 5 rocket’s launch with the Solar Orbiter spacecraft with this mission timeline.

More than three weeks after a faulty electrical component halted a countdown moments before liftoff, an Ariane 5 rocket lifted off from French Guiana on Friday with two commercial communications satellites. Launch occurred at 2156 GMT (5:56 p.m. EDT).