Range Folding

• Q: What is the maximum unambiguous range at which a radar can see a target? Answer

• so, if target is at range less than or equal to Ru, target will be displayed at correct range

• if target is beyond Ru, it will not.

• example: if target is at r=170 km and Ru=150 km, the radar thinks it is at 20 km and that is where the echo will be displayed.

• This is called range folding.

• Range folded echoes are called second trip echoes