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Analysis of ETMS Data Quality for Traffic Flow Management DecisionsThe data needed for air traffic flow management decision support tools is provided by the Enhanced Traffic Management System (ETMS). This includes both the tools that are in current use and the ones being developed for future deployment. Since the quality of decision support provided by all these tools will be influenced by the quality of the input ETMS data, an assessment of ETMS data quality is needed. Motivated by this desire, ETMS data quality is examined in this paper in terms of the unavailability of flight plans, deviation from the filed flight plans, departure delays, altitude errors and track data drops. Although many of these data quality issues are not new, little is known about their extent. A goal of this paper is to document the magnitude of data quality issues supported by numerical analysis of ETMS data. Guided by this goal, ETMS data for a 24-hour period were processed to determine the number of aircraft with missing flight plan messages at any given instant of time. Results are presented for aircraft above 18,000 feet altitude and also at all altitudes. Since deviation from filed flight plan is also a major cause of trajectory-modeling errors, statistics of deviations are presented. Errors in proposed departure times and ETMS-generated vertical profiles are also shown. A method for conditioning the vertical profiles for improving demand prediction accuracy is described. Graphs of actual sector counts obtained using these vertical profiles are compared with those obtained using the Host data for sectors in the Fort Worth Center to demonstrate the benefit of preprocessing. Finally, results are presented to quantify the extent of data drops. A method for propagating track positions during ETMS data drops is also described.
Document ID
20050157098
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Chatterji, Gano B.
(NASA Ames Research Center Moffett Field, CA, United States)
Sridhar, Banavar
(NASA Ames Research Center Moffett Field, CA, United States)
Kim, Douglas
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2003
Subject Category
Aircraft Stability And Control
Report/Patent Number
AIAA Paper 2003-5626
Meeting Information
Meeting: AIAA Guidance, Navigation, and Control Conference
Location: Austin, TX
Country: United States
Start Date: August 11, 2003
End Date: August 14, 2003
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
PROJECT: RTOP 727-01-25
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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