Titan 401A Centaur | NROL-4
Space Launch Complex 41
Cape Canaveral, FL, USA
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United States Air Force
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.
NROL-4 (Trumpet 3)
Trumpet signal intelligence satellites were launched by Titan-4(01)A Centaur-T into highly elliptic Molniya-type orbits. In their elliptical orbits they would move very slowly over the northern hemisphere for most of their orbital period, allowing interception of microwave line-of-sight communications beams. Since they would move slowly through the beams during their orbit, a constellation of such satellites was required to monitor Soviet communications throughout the day.
Titan 401A Centaur
Height 63.10 Meters
Max Stages 3
Mass To GTO 9000 kg
Liftoff Thrust 14200 kN
Diameter 3.05 Meters
Mass To LEO 21680 kg
Liftoff Mass 868 Tonnes
Launch Success 8
Consecutive Success 0
Maiden Flight 1994-02-07
Launch Failures 1
