27th Congress of International Council of the Aeronautical Sciences, 19 - 24 September 2010, Nice, France 
Paper      ICAS 2010-11.11.1           
TRAJECTORY PREDICTION UNCERTAINTY MODELING FOR CONTINUOUS DESCENT APPROACHES 
            G. Enea, R. Vivona, D. Karr, K. Cate*     
          Engility Corporation, USA; *NASA Ames Research Center, USA
Keywords:  continuous descent approach, trajectory prediction, uncertainty estimation          
 
In this paper a new methodology was applied to quantify real-time uncertainty estimation models within the NASA’s Center/TRACON Automation System (CTAS) for Continuous Descent Approach (CDA) operations. A model to add real-time uncertainty estimation to CTAS trajectory predictions has been developed through the analysis of real world data.         

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