An Ariane 5 rocket journeyed from its assembly hangar to a nearby launch pad in French Guiana on Tuesday, a day before the heavy-duty launcher is scheduled for liftoff with the first in a new generation of high-capacity communications satellites for Intelsat.

A United Launch Alliance Atlas 5 rocket took off from Cape Canaveral at 3:28 a.m. EDT (0728 GMT) today to place a classified surveillance satellite into space for the U.S. National Reconnaissance Office. Follow the ascent in our live journal.

The ubiquitous Global Positioning System that ties the space program to everyday life on Earth, providing precise navigation to the world through a constellation of orbiting satellites, will be strengthened courtesy of a new craft launched Wednesday.