Abstract
The Federal Aviation Administration (FAA) is upgrading its Air Traffic Control (ATC) system and plans to replace the existing en route automation system. The Host Computer System (HCS) is the main frame computer operating in all twenty en route Air Route Traffic Control Centers (ARTCCs) in the continental United States. This paper extends a previous study analyzing how the HCS's tracking of radar surveillance data was compared to time coincident Global Positioning Satellite System (GPS) aircraft positions. Using several hundred flights collected from all twenty ARTCCs, this paper compares how the HCS's radar tracking function performs during horizontal turns versus the same flight's straight portion of flight. The paper presents an analysis methodology and reports on a modest effect of turns on the HCS's radar tracking.
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