Liftoff is set for 5 p.m. EDT (2100 GMT) today. The live webcast will begin at 4 p.m. EDT (2000 GMT).
Link to Livestream video at http://www.space.com/17933-nasa-television-webcasts-live-space-tv.html
Launch is from Wallops Island, so perhaps our alert readers along the mid-Atlantic coast may see it.
BUMPED AND UPDATED: Let’s try that yet again – today, Sunday the 21st at 5 p.m. EDT. Same Livestream link should work.
Congratulations on a successful launch!