The launch is scheduled for 30 April from Cape Canaveral and launch complex 40 at 9:22 AM Phoenix time (1622 UTC). The mission is designed to satisfy both the Commercial Orbital Transportation Services program (COTS) level 2 and 3 requirements. Officially, the mission will be successful if it satisfies the COTS 2 requirements. All of us hope that both sets of requirements will be met, and the Dragon will deliver its cargo to the ISS.
The Dragon is the only spacecraft with down mass capability other than the crewed Soyuz spacecraft. The Russian Progress, European Space Agency (ESA) ATV and Japanese Space Exploration Agency (JAXA) HTV all burn up upon re-entry. The up mass and down mass manifest for Dragon include: