A check of the weather shows green status across the board. The countdown is progressing smoothly and the #AtlasV team is not working any issues. bit.ly/av_ses
The last step of fueling has started. This will place about 12,300 gallons of liquid hydrogen fuel into the energetic Centaur upper stage to deliver the @SES_Satellites payload. Still targeting 5:36pmEDT (2136 UTC) for liftoff.
We are now in the phase of #AtlasV fueling that tops off the tanks to give us a 1,079,743-pound (489,763-kg) rocket for launch at 5:36pmEDT (2136 UTC) from Cape Canaveral Space Force Station, Florida. bit.ly/av_ses
Beautiful day in Florida. A little breezy, but not bad. #SES20 #SES21
No issues in work. Board is green. #SES20
The countdown has entered the planned 30-minute built-in hold at T-minus 4 minutes. The final readiness polls will be performed during this hold before permission is given to launch. Liftoff time remains 5:36pmEDT (2136 UTC). bit.ly/av_ses
Weather is observed and forecast GO for liftoff a half-hour from now, according to the countdown's final planned briefing by weather officer Jessica Williams.Live reports from the Cape: bit.ly/av_ses
LWO reports no clouds of concern, winds ok, and proton flux at background levels.
Still targeting liftoff at 36 minutes past the hour. Weather continues to be GO, no technical issues are being addressed and we remain on schedule. Today marks the 678th Atlas launch since 1957, the 96th #AtlasV and fifth in the 531 configuration.
