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First Delta IV launch from Vandenberg. [50] 7 2006-11-04 13:53 Medium 320 VAFB, SLC-6: USA-192 Military weather satellite SSO: Success First Delta IV launch into a LEO/SSO, last flight of Delta IV Medium. 8 2007-11-11 01:50 Heavy 329 CCAFS, SLC-37B: USA-197 Missile warning satellite GSO Success
The launch was conducted by ULA and was the first flight of a Delta IV Heavy from Vandenberg. [35] On 24 September 2022, ULA launched the last Delta IV Heavy from the pad, concluding their use of SLC-6. [36] Vulcan Centaur, Delta IV Heavy's successor, will launch from SLC-3E at Vandenberg, currently used by Atlas V. [37]
Delta IV was a group of five expendable launch systems in the Delta rocket family introduced in the early 2000s. Originally designed by Boeing 's Defense, Space and Security division for the Evolved Expendable Launch Vehicle (EELV) program, the Delta IV became a United Launch Alliance (ULA) product in 2006.
The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle.When it was in service from 2004 to 2024, it was the largest type in the Delta IV family and was the world's second highest-capacity rocket in operation, behind SpaceX's Falcon Heavy rocket and closely followed by CNSA's Long March 5 rocket.
The first of the Delta IV launch vehicles to fly from SLC-6 successfully lifted off at 20:33 PDT on 27 June 2006 when a Delta IV Medium+ (4,2) rocket lofted NROL-22, a classified satellite for the National Reconnaissance Office, into orbit. The payload was successfully deployed approximately 54 minutes later.
Used by: Thor-Delta. First launch 16 April 1959, last launch 19 June 1962. Originally a Thor 75 SMS PGM-17 Thor IRBM pad 75-2-8. Used by RAF for launch training. Number of launches 7. Upgraded for use as a launch emplacement in 1961, inactivated in June 1962 after 2 RAF test launches. [7] PLC-C
Delta IV Medium+ (5,2), coded Delta 9250, was similar to the Medium+ (4,2), but had a 5-m–diameter DCSS and payload fairing for larger payloads. Because of the extra weight of the larger payload fairing and second stage, the Medium+ (5,2) could launch 5,072 kg to GTO.
Delta IV Heavy: CCAFS SLC-37B DSP-23: 5,250 kg GSO: US Air Force: Success [55] First Delta IV launch contracted by United Launch Alliance and first operational Delta IV Heavy launch. Launch delayed due to damage to launch pad caused by a liquid oxygen leak. [56] Missile warning satellite.