Magnetic and EMC control of a deep-space satellite transponder

The transponder section of the spacecraft used in the Helios project is examined relative to magnetic cleanliness and electromagnetic compatibility (EMC) management, telecommunication system, the EMC problem, and magnetic control. Requirements are identified which are necessary for the successful accomplishment of a project such as the Helios satellite transponder which has to fulfill a space mission in the hostile RF noise environment existing in the region of the sun and also first pass in an operational condition through the near earth RF signal environment. Performance of the transponder during different space flights is briefly discussed.