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Originally Posted by surreal1221  Ok. Not saying you are wrong, as it's more likely a two issue problem. Just let be known that errors of this type have been found within the radar infrastructure of the NAS. |
Agreed, there are issues with radar, but as others pointed out most issues are lateral and often stem from problems reconciling the AC's position as reported by multiple radars. Radar is excellent for determining distance, but a tad fuzzier at azimuth, so if you plot 3 hits on the same AC from 3 different radars, you'll get 3 slightly different postions. To network that picture across multiple facilites you have to have a routine to "pick" a position to display.
That's one of the advantages of ADS-B. How ever many ground stations recieve your position report, the position will be the exact same. That's much easier to network properly, so ATC has better overall SA. Most radars currently only feed one or two facilites. Mosaic pictures showing the overall radar situation have a lot of latency due to the filtering routines so it's more a picture of where everybody was several seconds (even minutes) ago.