What is EMC?
Electromagnetic compatibility (EMC) is the branch of electrical engineering concerned with the unintentional generation, propagation and reception of electromagnetic energy which may cause unwanted effects such as electromagnetic interference (EMI) or even physical damage in operational equipment..
What is EMI?
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.
What is PQ?
Power Quality (PQ), refers to the characteristics of the power, or specifically the current and voltage, provided to the customer. As the design of the International Space Station (ISS) Electrical Power System (EPS) evolved, it became apparent that new loads, payloads, and the ISS itself, would benefit by having a more complete criteria for compatibility with the ISS EPS.
What is Magnetic Cleanliness?
The magnetic moment of a satellite and the magnetic induction of the earth create a perturbation torque that needs to be compensated by means of the ACS (Attitude Control System). To reduce the magnetic moment impact on the satellite attitude control, it is requested to achieve acceptable magnetic cleanliness level on each subsystem of the satellite. Another example is when satellite carries a magnetometer on board for determination of the satellite location and attitude in the known earth’s field. In these case, the magnetic field of the satellite at the location of the sensitive equipment (magnetometer) must be known in order to evaluate correctly the data collected by the equipment during the mission.
