The Common Terminal Digitizer (CTD) offers a cost-effective, radar upgrade solution designed to extend the service life of Primary and Secondary Surveillance Radar (PSR/SSR) systems. By updating legacy algorithms with modern digital technology, CTD integration enhances surveillance performance, small target detection accuracy and weather processing. The CTD imports receiver performance and is designed for simple integration with a variety of existing radar systems, providing a viable technology enhancement option without the time, expense and training associated with a completely new system.