The altitude clutter line that I mentioned has nothing to do with the Jaybird radar (RP-22?).. I only brought that up because people here brought up radars struggling to detect matching speed targets.   The altitude clutter line only affects pulse doppler radars, because only pulse doppler radars measure the doppler spectrum. The Jaybird is not a pulse doppler radar, and thus would not suffer from this problem.   That being said, old school pulse radars, like the Jaybird, have to deal with a