Ambiguous Return occurs when which phenomenon is observed?

Ambiguous Return occurs when which phenomenon is observed?

• A. Ghost echo
• B. Ambiguous Return
• C. Range aliasing
• D. Echo bleed

Answer: (B)

In radar terms, an Ambiguous Return means you can’t confidently assign an echo to a single target because the range or Doppler information is unclear. When that kind of unclear, multi-interpretation echo appears, you’re observing an Ambiguous Return. This happens because factors like limited range resolution or PRF-related range aliasing can make one echo appear in multiple possible ranges or with conflicting velocity data. Ghost echoes are separate false echoes from multipath or processing quirks, while range aliasing is a mechanism that can create ambiguity but isn’t itself the observed ambiguous return. Echo bleed is leakage of a strong signal into adjacent channels.

In radar terms, an Ambiguous Return means you can’t confidently assign an echo to a single target because the range or Doppler information is unclear. When that kind of unclear, multi-interpretation echo appears, you’re observing an Ambiguous Return. This happens because factors like limited range resolution or PRF-related range aliasing can make one echo appear in multiple possible ranges or with conflicting velocity data. Ghost echoes are separate false echoes from multipath or processing quirks, while range aliasing is a mechanism that can create ambiguity but isn’t itself the observed ambiguous return. Echo bleed is leakage of a strong signal into adjacent channels.