What factors determine when to use MLAT to augment radar coverage?

What factors determine when to use MLAT to augment radar coverage?

• A. Only with weather constraints
• B. In areas where radar coverage is limited or to supplement SSR
• C. Only on ground taxiways
• D. Only for international flights

Answer: (B)

MLAT augments radar coverage by using multiple ground receivers to locate cooperative aircraft based on the timing differences of transponder signals. The deciding factor is where radar coverage is limited or absent, such as in gaps created by distance, terrain, or sensor reach, and the need to supplement SSR with position data derived from those transponder replies. It works best in areas where you have enough sensors and good geometry to produce accurate positions, rather than relying on a single radar source. It isn’t tied to a specific type of aircraft or location like ground taxiways or international flights; the key point is enhancing surveillance where radar is insufficient. Weather can degrade radar performance, but MLAT’s usefulness comes from filling coverage gaps with cooperative transponder data, so coverage needs and sensor network integrity drive the decision to deploy MLAT.

MLAT augments radar coverage by using multiple ground receivers to locate cooperative aircraft based on the timing differences of transponder signals. The deciding factor is where radar coverage is limited or absent, such as in gaps created by distance, terrain, or sensor reach, and the need to supplement SSR with position data derived from those transponder replies. It works best in areas where you have enough sensors and good geometry to produce accurate positions, rather than relying on a single radar source. It isn’t tied to a specific type of aircraft or location like ground taxiways or international flights; the key point is enhancing surveillance where radar is insufficient. Weather can degrade radar performance, but MLAT’s usefulness comes from filling coverage gaps with cooperative transponder data, so coverage needs and sensor network integrity drive the decision to deploy MLAT.