VANDENBERG, Ca. – Follow live updates below as United Launch Alliance launches its first rocket of 2018, the Delta 4, from California. All times are EST.
7:45 p.m. Officials announced that the Delta 4 launch would be scrubbed. Another launch attempt will be scheduled for Friday.
7:30 p.m. Delta 4 is stretching into the last minute of the long launch window with a new liftoff time of 7:59 p.m. EST.
7:21 p.m. Launch officials are determining a new launch time for Delta 4. The earliest supportable launch time is 4:27 p.m. PST (7:27 EST).
7:05 p.m. After counting down to 27 seconds launch officials again called another hold, resetting the clock to 4 minutes. No reason for the most recent hold was given.
6:48 p.m. After finding a workaround for the swing arm sensor issue, ULA announced a new launch window at 7:05 p.m. EST
6:15 p.m. The range is red, meaning a "no go," right now in California. The launch window extends until about 8 p.m. EST.
5:22 p.m. Launch officials determined the countdown hold was caused because of a sensor that indicated the swing arm system were not in the correct position, however, the arms appeared to be in place.
ULA’s team continues to investigate the issue, holding at 4 minutes.
5:10 p.m. Standing by, awaiting a new launch time.
5:05 p.m. The first launch of the year from California is awaiting a countdown restart after launch officials delayed liftoff of the Delta 4 rocket carrying a mission for the National Reconnaissance Office.
The United Launch Alliance is preparing to launch its Delta 4 rocket in the company’s first launch of the year and the first from the California range.
Delta 4 is carrying a spacecraft for the National Reconnaissance Office, known at NROL-47.
The mission will provide innovative overhead intelligence systems for national security, according to ULA officials.
Liftoff is targeted for 2:05 p.m. Pacific time, (5:05 Eastern) from Vandenberg Air Force Base in California.
What to know:
Rocket: Delta IV, mission NROL-47
When: Thursday, Jan. 11, 5:05 PST, launch window closes at 8 p.m. EST
Launch pad: Space Launch Complex 6, Vandenberg Air Force Base, California