Practice question

What is the primary technical difference between Primary Surveillance Radar (PSR) and Secondary Surveillance Radar (SSR)?

  1. PSR relies on reflected radio signals from the aircraft skin; SSR requires a cooperative transponder response
  2. PSR requires a transponder; SSR operates independently of aircraft equipment
  3. PSR is only used for weather detection; SSR is used for aircraft tracking
  4. PSR operates in the VHF band; SSR operates in the UHF band

Answer: A — PSR relies on reflected radio signals from the aircraft skin; SSR requires a cooperative transponder response

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