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