Lift-off is set for 8:10 a.m. EDT (1210 GMT) Thursday for a GPS IIF satellite, reports Spaceflight Now. GPS IIF-3 will replace an aging 19-year-old craft in plane A, slot 1, part of the program to incrementally upgrade the GPS constellation with greater accuracy, better jam-resistance, and a new civilian aviation signal, all of which are features of the Boeing-build Block IIF series.
The United Launch Alliance Delta 4 rocket and GPS satellite payload will undergo a final technical assessment today and a readiness review Tuesday before entering into countdown operations Wednesday night.
The 19-minute launch window is timed to deliver the GPS IIF-3 satellite directly into plane A of the navigation network 11,000 miles above Earth.
The satellite is expected to be checked out and ready for handover to Air Force controllers by mid-November, according to Jan Heide, Boeing’s GPS program director.
Photos from United Launch Alliance: