ULA said Saturday the payload was launched aboard a Delta IV evolved expendable launch vehicle from Space Launch Complex-37 at Cape Canaveral Air Force Stationin Florida
Aerojet Rocketdyne provided three RS-68A booster engines for Delta IV built to provide up to 318 metric tons of thrust each, as well as an RL10B-2 upper-stage engine, multiple attitude control thrusters and 26 helium pressurization tanks.
Orbital ATK delivered three thermal shields, three centerbody structures, the composite interstage on the center common booster core, the nose cones on the two strap-on boosters and one set of X-panel structures for the payload.
The NROL-37 payload launch represents the ninth deployment via a Delta IV, ULA noted.
The U.S. Air Force established the commercially-developed EELV program to provide space access for government payloads.