Phase Gate

The instrument or system that performs the mission's primary function. For Earth observation: cameras or sensors. For co...

The point in an orbit closest to the central body. For Earth orbits, the lowest altitude above Earth's surface....

An accounting of electrical power generation (solar panels, batteries) and consumption (subsystems, payload, heaters) ac...

A phase gate review that evaluates the preliminary design to confirm it meets requirements and the design approach is fe...