Launch is on

The launch day countdown began at 4:07 a.m. EST this morning as teams reported to stations in preparation for today's launch of Orbital Sciences' Orbital-1 cargo resupply mission to the International Space Station. Orbital is targeting a 1:07 p.m. launch from the Mid-Atlantic Regional Spaceport Pad 0A at NASA's Wallops Flight Facility in eastern Virginia. Launch is on-track and the Orbital team is not working any issues.

Weather has improved to an 85 percent chance of favorable conditions at the time of launch. Thick clouds are the primary concern for a weather violation.

Video b-roll of launch preparations will air at 12:15 p.m EST. on NASA Television. Launch commentary coverage will begin at 12:45 p.m.