ECM wedges are used for what?

• A. to calibrate radar frequencies
• B. to determine the approximate range of a formation of non-range-resolved jammers
• C. to map terrain features
• D. to measure signal strength

Answer: (B)

ECM wedges help you estimate distance to a group of jammers when you can’t separate them by range. When jammers are non-range-resolved, you get a collective signal in a single range bin, so you don’t know how far away the whole formation sits. An ECM wedge uses a deliberately shaped, known jamming pattern whose interaction with the radar changes in a predictable way as distance changes. By observing how the wedge signature appears in the radar data and comparing it to the known relationship between range and that signature, you can infer the approximate range to the jammer formation. This gives a rough distance measurement even though individual jammers aren’t resolved.