Photos: Atlas 5 on the pad for X-37B launch

Follow the unclassified portion of the Atlas 5 rocket’s ascent to space from California’s Vandenberg Air Force Base launch site with the U.S. National Reconnaissance Office’s NROL-79 satellite payload. Launch is scheduled for Wednesday at 9:50 a.m. local time (12:50 p.m. EST; 1750 GMT).

Technicians began the painstaking work of assembling a powerful Atlas 5 rocket today, a launcher that will deploy an advanced satellite to substantially improve U.S. weather forecasting.

While NASA and Boeing engineers investigate the cause of a software error that cut short the first orbital test flight of the Starliner crew capsule last month, ground teams have returned the spaceship from its landing site in New Mexico back to the Kennedy Space Center in Florida. Preliminary inspections indicate the reusable spacecraft weathered its first trip into orbit better than expected, and Boeing teams are confident the ship will need only “minimal refurbishment” before its next launch with astronauts.