frequency finder Algorithm

The basic technique remains in purpose to this day as one of the fundamental disciplines of signals intelligence, although typically integrated into a larger suite of radio systems and radars instead of being a stand-alone system. The basic concept is also known by several alternate names, including cathode-ray direction find (CRDF), Twin path DF, and for its inventor, Watson-Watt DF or Adcock / Watson-Watt when the antenna is considered.

frequency finder source code, pseudocode and analysis