Preliminary analysis shows the rocket's upgraded propulsion system, its core stage and the launch complex, which was repaired and modified after the explosion, all worked as planned, said Orbital vice president Mike Pinkston, who oversees the Antares program.
For the test, Orbital fully fueled the rocket, conducted a launch countdown, ignited the engines, tested multiple throttle settings, including full power, and then shut down the motors.
NEWS: Antares Rocket Explodes Moments After Liftoff
Orbital said the test also validated launch pad operations, including propellant loading and use of the water deluge system, which protects the pad during launch.
Technicians will now clean the engines and return the first-stage used during Tuesday's test to a processing hangar for servicing.
Another Antares rocket is being prepared to return the Orbital fleet to flight in early July on a cargo run to the space station for NASA.
Antares debuted in 2013 and made three more successful flights before a problem with one of its original AJ26 engines triggered a catastrophic explosion seconds after liftoff on Oct. 28, 2014, destroying a Cygnus cargo ship bound for the station.