This launch is a Falcon 9 launch of the GPS III-9 mission to medium-Earth orbit from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida. The 15-minute window opens at 11:38 p.m. ET with a backup opportunity available at 11:34 p.m. ET on Wednesday, January 28. This is the fifth flight for the first stage booster supporting this mission, which previously launched KF-01, IMAP, NROL-77, and one Starlink mission. Following stage separation, the first stage will land on the A Shortfall of Gravitas droneship, which will be stationed in the Atlantic Ocean.