The second space vehicle in the modernization of the Global Positioning System, GPS III SV-2, is scheduled for launching on Thursday, July 28, 2019. The GPS satellite will be carried into transition orbit by a United Launch Alliance (ULA) DELTA IV Medium 4.2 (i.e., 4-meter diameter upper stage and two solid boosters) from Cape Canaveral Air Force Station, Florida. The launch window starts at 10:55 a.m. EDT and ends 11:21 a.m. EDT.
ULA is apparently retiring the DELTA IV Medium configuration rocket after this mission, as they note this will the final flight of this particular design.
The GPS III SV-2 satellite was built by Lockheed Martin, and was declared ready-for-launch last August (2018). The satellite's propulsion engine was fueled in late June, and on July 2 the satellite installation on the DELTA IV upper stage fairing was announced.
The U.S. Air Force Space Mission Command has a Twitter Feed at
and are providing updates as the launch date approaches.
The initial GPS III satellite, SV-1, was launched on December 23, 2018 by a SpaceX rocket. GPS II SV-1 is still being checked out, and its status is "testing."
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