Commercial Fixed Wing
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1.0
Confusion; Human-Machine Interface; Distraction
ATC Issue All Types
Air Traffic Control Issued New Clearance
ATC Equipment / Nav Facility / Buildings
Aircraft X was on course from BAHMA to RAJAY descending from 21;000 feet to 17;000 feet. Aircraft Y was on a 135 heading climbing to 21;000 feet. On those specific tracks; Aircraft X would pass off of Aircraft Y left side by about 6 miles. Aircraft X target; however; started jumping within a few miles of where he actually was. This is a radar issue that has been going on in that spot for at least a couple of weeks and Tech Operations has been aware of the issue. Aircraft X target first jumped slightly to the right and his vector line went due east; and then the next hit the target was back on track. It then jumped slightly to the left and showed a due south heading; and then jumped back on track again. At this point I decided to turn Aircraft Y to the right; just to ensure there wouldn't be an issue; but as Aircraft Y was turning; Aircraft X target jumped again; and this time it showed within 5 miles of Aircraft Y target. I believe at this point their altitudes were both passing 19;000 feet; Aircraft X still descending and Aircraft Y still climbing. There was never actually an issue of separation since it was a radar anomaly; but the scope did show the targets about 4 miles apart when the target jumped. After another sweep Aircraft X target was back on track and well outside of Aircraft Y 5-mile ring. I'm not sure what could have been done differently since the target jumps and radar anomalies are a known issue and cannot be predicted. There was no way to know where Aircraft X target was going to jump; but the actual aircraft was always on course and never lost separation with Aircraft Y.
ZMA Center Controller reported an aircraft's radar target on their scope jumping and giving erroneous heading indications led to a erroneous indication of a separation error with opposite direction traffic.