December 10, 2019

Delta 4 launch delayed as ULA probes supplier concern

July 17, 2019

Concerns over an unspecified part flying on the upper stages of United Launch Alliance’s rockets have delayed the launch of a GPS satellite on a Delta 4 booster from July 25 to no earlier than Aug. 22. The same issue has also delayed an Atlas 5 launch.

GPS satellite encapsulated for Delta 4 launch

July 4, 2019

The U.S. Air Force’s next GPS navigation satellite has been closed up inside the payload fairing of its Delta 4 launcher ahead a liftoff from Cape Canaveral scheduled for July 25.

Photos: Delta 4 rocket blasts off from Cape Canaveral

March 20, 2019

A hydrogen-fueled main engine and four solid rocket boosters combined to propel a United Launch Alliance Delta 4 rocket off its launch pad at Cape Canaveral on March 15, successfully sending a U.S. Air Force communications satellite into orbit.

Delta 4 rocket launches Air Force’s 10th WGS broadband satellite

March 16, 2019

United Launch Alliance placed a new satellite in orbit with a fiery Friday night blastoff from Cape Canaveral, using a version of the Delta 4 rocket that is nearing retirement to supplement a U.S. military network relaying signals from drones and battlefield commanders.

Delta 4 rocket’s launch timeline with WGS 10

March 15, 2019

A United Launch Alliance Delta 4 rocket will deliver the U.S. Air Force’s tenth Wideband Global SATCOM communications satellite to a supersynchronous transfer orbit around 37 minutes after lifting off from Cape Canaveral.

Live coverage: Delta 4 rocket launches from Cape Canaveral

March 15, 2019

A United Launch Alliance Delta 4 rocket lifted off from Cape Canaveral at 8:26 p.m. EDT Friday (0026 GMT Saturday) with the U.S. Air Force’s tenth Wideband Global SATCOM satellite, extending the reach of the military’s highest-capacity satellite communications network.

Photos: Delta 4-Heavy blasts off from Vandenberg

January 26, 2019

The first of up to seven United Launch Alliance missions lifted off Jan. 19 from Vandenberg Air Force Base in California, where a Delta 4-Heavy launcher fired into orbit with 2.1 million pounds of thrust from three hydrogen-fueled RS-68A main engines with a U.S. government spy satellite.

Delta 4-Heavy rocket launches U.S. spy satellite into unusual orbit

January 19, 2019

A top secret surveillance payload owned by the National Reconnaissance Office soared into space Saturday from Vandenberg Air Force Base in California on top of a United Launch Alliance Delta 4-Heavy rocket, entering an unusual orbit not previously used by the U.S. government’s spy satellite fleet.

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