PSAT (Passive Satellite)

A Passive Satellite (PSAT) is a type of satellite that doesn't have its own power source or active communication systems. Instead, it relies on transmitting signals received from an active satellite or ground station, usually by reflecting or passively amplifying those signals. Think of it like a mirror in space, bouncing signals between other satellites and Earth. This approach often reduces complexity and cost. PSATs are used mainly for scientific experiments, environmental monitoring, or educational purposes, providing data relay without needing onboard power or active transmission—making them a simple, durable component of satellite systems.