What is a false target and how can radar operators mitigate to reduce false alarms?

• A. A false target is a real echo misinterpreted as two targets.
• B. A false target is a non-existent echo; mitigate by adjusting gain, applying MTI/CFAR, and cross-checking with other sensors.
• C. A false target is a weather phenomenon that shows as a contact; mitigate by ignoring it.
• D. A false target is a ghost contact caused by laughter.

Answer: (B)

A false target is a non-existent echo that the radar system interprets as a contact. It shows up due to clutter, noise, interference, multipath, or atmospheric effects rather than because there is a real object there. To reduce these false alarms, radar operators adjust receiver gain to avoid amplifying noise, apply moving target indicator to suppress stationary clutter, and use CFAR to adapt the detection threshold to the local clutter level. Cross-checking with other sensors or data helps confirm whether a contact is real before acting on it.

Other descriptions miss the essential point: a false target isn’t a real echo split into two; it’s an illusion created by clutter or noise. Weather echoes aren’t inherently false and ignoring them isn’t a robust approach, and a “ghost” from laughter isn’t a real concept in radar operation.