Look in the FotRSU Support / HowTo folder for CapnScurvy's "Using Radar_Sonar.pdf" file for something close to the FotRSU set-up. Bubblehead has the 3D TDC in his re-worked TMO, and that would be different. For the 'real' way to do it, try
RADAR Operators' Manual, RADAR Bulletin NO. 3 on the USS Pampanito web site.