PAR-80

The PAR-80 Precision Approach Radar is an Air Traffic Control (ATC) radar system designed to guide aircraft during the final stages of approach. As the successor to the AN/FPN-36, it is installed adjacent to the runway and assists controllers by displaying the landing aircraft's position on a Beta-Scan Scope relative to an ideal glide path. The system operates in the I-band with a peak power of 180 kilowatts and an average power of 124 watts, utilizing a frequency-scanning phased array antenna with a beamwidth of 1.1 degrees. This antenna electronically steers the beam horizontally, while the entire array swivels vertically via an elliptical gearbox; critical components are duplicated for redundancy. An available upgrade replaces the original CRT displays and video processor with software-controlled systems to mitigate issues with visibility, clutter, and increasing maintenance due to obsolete components.

radartutorial.eu: https://www.radartutorial.eu/19.kartei/03.atc/karte012.en.html