polarity test


test to verify the correct polarity of the functional chains (mainly AOCS) or equipment of the space segment element from sensors to actuators, through a number of interfaces and processing.


  • NOTE 1 A polarity error can be generated throughout the development process: interface documentation, design, H/W manufacturing, S/W development, satellite AIT, satellite database.
  • NOTE 2 A polarity error can be generated by any element of the functional chain: sensor or actuator design, sensor or actuator mounting, harness, interface units, software algorithms.
  • NOTE 3 Polarity inversion on Safe Mode control loops can cause a satellite loss.
  • NOTE 4 4 This term "sign test" is synonymous.
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