The launch of a SpaceX Falcon 9 rocket carrying the firm’s second set of Starlink internet satellites this week, which will be the Space Coast’s first flight of the year, should be mainly positive. The 230-foot rocket should fly into 80 percent “go” weather surrounding Kennedy Space Center’s pad 39A around 4:49 p.m. ET Thursday if schedules and circumstances hold. Until 6:47 p.m., the window will remain open. Conditions are projected to drop significantly to 70% “go” during a comparable window on Friday if there is a delay or scrub. The key distinction is the probability of stronger winds at liftoff.