NASA - National Aeronautics and Space Administration
Follow this link to skip to the main content
+ Visit NASA.gov
+ Contact NASA
ABOUT NASA LATEST NEWS MULTIMEDIA MISSIONS MY NASA WORK FOR NASA

+ Home
Aviation Systems
ABOUT US
ATM RESEARCH
FACILITIES AND CAPABILITIES
LATEST NEWS
PUBLICATIONS
RESOURCES
MULTIMEDIA
Search Aviation Systems
Go



USER PREFERRED ROUTING
User Preferred Routing (UPR)/Descent Advisor (DA) Conflict Probe

The UPR/DA Conflict Probe is a conflict detection and resolution tool for use by enroute (Center) air traffic controllers. This tool is designed to help detect and resolve all classes of conflicts, such as
  • overflight vs. overflight
  • arrival vs. overflight
  • climbout vs. overflight
  • others
Conflicts are resolved up to twenty minutes in advance. The design is based on an approach that combines deterministic trajectory prediction and stochastic conflict analysis to achieve reliable conflict detection. An efficient algorithm estimates conflict probability as a function of encounter geometry. The conflict probability theory and algorithm are applied to the design of the Conflict Probe and are further used to develop a method of automated conflict resolution with constraints on the post-resolution conflict probability. Additionally, the Conflict Probe uses methods, which minimize the time to search the trajectories for potential conflicts. Performance tests of the search algorithm indicate that up to 800 aircraft can be processed by the Probe within a search cycle of 10 seconds. The Conflict Probe has been implemented as a software process within the Center-TRACON Automation System (CTAS). It uses the trajectory synthesis capability of CTAS to generate predicted trajectories for the conflict search and trial resolution processes. Field evaluation of the Probe will be conducted at the Denver and Fort Worth Centers beginning in September 1997.

For more details, see:
Erzberger, H., Paielli, R. A., Isaacson, D. R., and Eshow, M. M., "Conflict Detection and Resolution In the Presence of Prediction Error," 1st USA/Europe Air Traffic Management R&D Seminar, Saclay, France, 17-20 June 1997.
+ Read Abstract
+ Download PDF Version

+ Back to Top
PUBLICATIONS
UPR Publications
Link to a list of UPR papers available for download.
+ View List
FirstGov - Your First Click to the US Government
+ Freedom of Information Act
+ Budgets, Strategic Plans and Accountability Reports
+ The President's Management Agenda
+ NASA Privacy Statement, Disclaimer,
and Accessibility Certification

+ Inspector General Hotline
+ Equal Employment Opportunity Data Posted Pursuant
to the No Fear Act

+ Information-Dissemination Priorities and Inventories
+ NASA Privacy Statement
NASA - National Aeronautics and Space Administration
Curator:
NASA Official:
Last Updated: October 13, 2016

+ Contact Us
+ About This Site


+ Download Acrobat Reader