As NASA’s Constellation Program brings us closer to returning to the moon and exploring Mars and beyond, it is vital that consistency in design is maintained across the multiple projects of Constellation that support these exploration missions. Design requirements for subsystems on the launch, crew and lander vehicles must be consistent to ensure compatibility across all systems.
 
To help maintain consistency among subsystems, NASA’s Glenn Research Center is providing key support to the lead Systems Engineering and Integration (SE&I) Office at Johnson Space Center. Glenn’s System Engineering Group and Analysis Teams also partner with Marshall Space Flight Center, Kennedy Space Center and the Jet Propulsion Laboratory in this effort.
 
Glenn’s Constellation Program SE&I Office is responsible for maintaining consistency within the following subsystems:

• Electrical Power:  provides support to all other critical subsystems essential for mission  success.
  

• Communications:  assures the transfer of vital mission data between vehicles and ground support  and astronaut voice connections.
  

• Flight  Performance: assures that the launch vehicles and crew can achieve flight  objectives through analysis of performance, design, propulsion, operations and  guidance.