CAPE CANAVERAL, Florida – A United Launch Alliance Delta IV rocket carrying a Global Positioning System III (GPS III) satellite is scheduled to lift off on Thursday, August 22, 2019, between 9:00 a.m. and 9:27 a.m. Eastern Daylight Time from Space Launch Complex-37 at Cape Canaveral Air Force Station in Florida.
4:16 a.m. UPDATE: Liquid hydrogen storage tank pressurization and charging the high-pressure helium bottles on the common booster core and second stage have begun.
Countdown clocks have resumed ticking after the standard pre-fueling pause. No problems in the countdown and liftoff remains targeted for exactly 9:00:30 a.m. EDT.
The latest forecast from the U.S. Air Force 45th Weather Squadron gives a 80% chance of overall acceptable launch weather conditions.
Cumulus clouds are the primary weather concerns on launch day.
GPS II Mission Payload
The Delta IV Medium+ (4,2) configuration rocket will deliver the second GPS III spacecraft, “Magellan,” to a medium earth orbit (MEO) for the U.S. Air Force Space & Missile Systems Center.
Lockheed Martin developed and built GPS III that is more powerful than any GPS space vehicle previously launched.
GPS III provides 3x better accuracy for military users than any previous GPS satellite with enhanced anti-jamming capabilities.
GPS III is the first GPS satellite broadcasting a compatible signal with other international Global Navigation Satellite Systems, like Europe’s Galileo,
improving connectivity for civilian users.