Boeing‘s Orbital Express system completed a pair of test milestones, Boeing announced April 4.

Boeing completed its baseline integrated system test of the Autonomous Space Transport Robotic Operations spacecraft and a series of electromagnetic interference and compatibility tests to verify component operation in the spacecraft’s actual electromagnetic environment.

The Orbital Express System a program funded by the Defense Advanced Research Projects Agency,and aimed at demonstrating fully autonomous on-orbit satellite servicing, consists of two satellites: Boeing’s servicing spacecraft and Nextsat, a modular, next-generation serviceable client satellite developed by Ball Aerospace.

A demonstration mission of Orbital Express is scheduled for October.