NASA's unmanned Exploration Flight Test-1 mission (EFT-1), scheduled for launch on Dec. 4, 2014, is meant to test the Orion capsule’s heat shield by sending the spacecraft zooming back to Earth from an altitude of 3,600 miles (5,800 kilometers). This will approximate the heat and pressure conditions that Orion will face when returning from deep-space missions to the moon or an asteroid.
Ultrawide field cameras in Orion’s windows will record flight events. 1,200 sensors aboard the capsule will record stresses, vibration, temperature, pressure and acceleration during the flight.
For the test flight, Orion will be launched on a United Launch Alliance Delta IV Heavy booster. When the capsule becomes operational, NASA's Space Launch System (SLS) megarocket is expected to be available for the task. [The Orion Capsule: NASA's Next Spaceship (Photos)]
At its highest, Orion will be farther into space than any human-spaceflight vehicle has been since 1972. The Orion capsule will pass through the inner Van Allen Belt, a zone of radiation trapped by the Earth’s magnetic field. Electonics and astronauts bound for the moon or deep-space destinations must survive passage through this radiation.
Delta IV Heavy specifications: