ZTL CTLR CONCERNED WITH SAFETY AS ACFT PROCEED THROUGH KNOWN AREA OF RADAR TRACK SPD JUMPS.

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RADAR JUMP PROB. KNOWN PROB FOR OVER 8 MONTHS. NOTHING DONE TO CORRECT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT A FIX WAS PROPOSED IN AN ATTEMPT TO CORRECT THIS PROB. THE RPTR STATED THAT 29 RADAR SORT BOXES WOULD BE REST RATIFIED; ESTABLISHING THE RADAR SITE AT ATLANTA AS BEING THE PRIMARY SITE; THE SAVANNA RADAR SITE CHANGED FROM PRIMARY TO SECONDARY. MAINT WOULD IMPLEMENT THESE CHANGES DURING THE MAY/00 DATABASE CHANGE CYCLE. THE RPTR ADVISED THAT A SAFETY SIT WOULD CONTINUE UNTIL THE RSB CHANGE WAS VALIDATED. SUPPLEMENTAL INFO FROM ACN 461825: RADAR TARGET JUMPED 2 OR 3 TIMES; 2-3 MI; CAUSING UNRELIABLE SPD INDICATION ON NAS DISPLAY AND UNCERTAINTY OF TRUE POS OF ACFT. THIS CONDITION HAS EXISTED FOR SEVERAL MONTHS. I HAVE REPEATEDLY RPTED IT TO FAA MGMNT; WITH NO RESULTS. SUPPLEMENTAL INFO FROM ACN 461832: TARGET JUMPS; SPLITS FOR 2 MINS; 15 MI N OF ODF VOR. RADAR SORT BOX 1380. SUPPLEMENTAL INFO FROM ACN 461836: DATABASE JUMP WHICH CHANGED SPD OF ACFT ON DISPLAY 420; BACK TO 380; UP TO 430; BACK TO 318. I RPT THIS TO SUPVRS ALMOST EVERY DAY. IT APPEARS NOTHING WILL BE DONE UNTIL MAY/00. THIS IS A SAFETY PROB.