Payload Isolation & Pointing Control

Most current commercial imaging satellites have a telescope mounted on top of a satellite bus. Pointing is performed using reaction wheels or control moment gyros on the bus. These control elements produce noise disturbances at discrete frequencies, which can blur the imagery. Because the disturbance frequencies are much higher than the control frequencies, one can mitigate the blur problem using isolation between the bus and payload. With an isolator there are two basic control options to consider. These options are analyzed in the following attachment using a simple, planar two-body model to provide insight into the nature of the problem.