What are the limitations of primary surveillance radar in air traffic control?

Primary surveillance radar (PSR) has several limitations in air traffic control, stemming from its reliance on reflected radio waves to detect aircraft, providing only limited information and susceptibility to various interference factors. PSR works by emitting a radio signal and detecting the signal that bounces back off an object. One major limitation is its inability to determine an aircraft's altitude directly. While PSR can provide horizontal position (azimuth and range), altitude information relies on secondary surveillance radar (SSR) or pilot reports. Another limitation is its susceptibility to clutter an....