The fourth unmanned H-2 Transfer Vehicle, or HTV-4, is scheduled to blast off from Tanegashima Space Center in southern Japan at 3:48 p.m. EDT (1948 GMT; 4:48 a.m. Sunday, Aug. 4 Japan time). You can watch launch coverage on SPACE.com here beginning at 3 p.m. EDT (1900 GMT), courtesy of NASA TV and the Hapan Aerospace Exploration Agency.