Code Division Multiple Access capability," said Capt. Joe Kan, the Navy program manager.
The rocket is flying the 551 vehicle configuration. The version features two stages, five solids and an 18-foot-diameter nose cone. It is powered off the launch pad by an RD AMROSS RD-180 main engine and Aerojet Rocketdyne solids. The Centaur upper stage has an Aerojet Rocketdyne RL10C-1 cryogenic engine.
Countdown clocks begin ticking seven hours before launch, leading to activation of the rocket, final testing and system preps. Fueling will be underway by 8:30 a.m. EDT.
Watch this page for live coverage throughout the countdown and flight of the Atlas-Centaur rocket.
Be sure to sign up for our Twitter feed to get occasional countdown updates on your cellphone. U.S. readers can also sign up from their phone by texting "follow spaceflightnow" to 40404. (Standard text messaging charges apply.)
Playalinda Beach is an ideal public viewing spot for the launch. The location puts you less than five miles from the launch pad to feel the 2.5 million pounds of liftoff thrust!
WEDNESDAY, JUNE 22, 2015
This is the ascent timeline to be followed by the United Launch Alliance Atlas 5 rocket in launching the Mobile User Objective System satellite No. 5 on Friday at 10:30 a.m. EDT.
The Launch Readiness Review was conducted earlier today and gave approval to proceed with the Atlas 5 rocket's rollout tomorrow and flight on Friday.
Weather forecasters continue to predict an 80 percent chance of favorable launch conditions.
TUESDAY, JUNE 21, 2016PREVIEW: For the fifth time in four years, a massive U.S. Navy satellite will launch atop an Atlas 5 rocket on Friday to finish the military's new $7.7 billion mobile communications framework 22,300 miles in space.
MONDAY, JUNE 20, 2016WEATHER: Air Force meteorologists are giving good odds of acceptable weather conditions for the United Launch Alliance Atlas 5 rocket to fly Friday morning from Cape Canaveral to put a Navy mobile communications satellite into orbit.
The United Launch Alliance Atlas 5 rocket was rolled to the pad today at Cape Canaveral’s Complex 41 in preparation for Friday’s liftoff. The flight will deliver the Mobile User Objective System satellite No. 5 into orbit, fulfilling a five-launch, four-year effort to assemble the military’s secure smartphone mobile communications network. Launch is scheduled for 10:30 a.m. EDT (1430 GMT).
Photos by United Launch Alliance
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