The United Launch Alliance (ULA), a joint-effort commercial launch service provider set up by Boeing and Lockheed Martin, succeeded in launching a U.S. Air Force communications satellite to orbit today, the fifth in a series of launches to form a constellation.

The satellite, code-named AEHF-5 (for the fifth “Advanced Extremely High Frequency” spacecraft) is already communicating with USAF on the ground, indicating full mission success.

For ULA, this is another win in an unbroken streak – it’s the 90th Atlas V launch to date, with 100% success across all those launches.

The launch took off from Cape Canaveral Air Force Station in Florida at 6:13 AM ET this morning, marking the second successful launch from the Cape this week (SpaceX launched the AMOS-17 satellite earlier this week).

The Atlas V for this mission was flying in what ULA terms “551” configuration, which means that it’s equipped with five solid rocket boosters surrounding its liquid-fueled center core booster.

This is the configuration that provides Atlas V with the most lift and payload capacity, which was necessary in this case because of the weight of the AEHF-5 satellite at nearly 14,000 lbs., combined with its target orbit.