Which radar type combines both PSR and SSR functions?

The correct answer is Terminal Surveillance Radar (TSR) because this type of radar integrates the functionalities of both Primary Surveillance Radar (PSR) and Secondary Surveillance Radar (SSR) to enhance situational awareness and tracking of aircraft within terminal airspace. PSR provides information on the position of aircraft by detecting reflected radio signals, while SSR relies on transponders on aircraft to receive signals and transmit back identifying information, including altitude and flight number. The combination of these two functions in a terminal environment allows for more accurate monitoring of air traffic, enabling controllers to manage operations safely and efficiently, especially in busy airspace near airports.

In contrast, Independent Second Surveillance Radar (ISSR) specifically focuses on SSR capabilities without the primary function provided by PSR. Surface Movement Guidance Radar (SMGR) typically operates in ground operations for taxiing aircraft and vehicles at an airport rather than combining both PSR and SSR functions effectively. Primary Weather Radar (PWR) is designed for detecting weather phenomena and does not involve aircraft surveillance. Thus, TSR stands out as the radar type that effectively merges both PSR and SSR to support safe and efficient terminal air traffic management.