NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Web-based Weather Expert System (WES) for Space Shuttle LaunchThe Web-based Weather Expert System (WES) is a critical module of the Virtual Test Bed development to support 'go/no go' decisions for Space Shuttle operations in the Intelligent Launch and Range Operations program of NASA. The weather rules characterize certain aspects of the environment related to the launching or landing site, the time of the day or night, the pad or runway conditions, the mission durations, the runway equipment and landing type. Expert system rules are derived from weather contingency rules, which were developed over years by NASA. Backward chaining, a goal-directed inference method is adopted, because a particular consequence or goal clause is evaluated first, and then chained backward through the rules. Once a rule is satisfied or true, then that particular rule is fired and the decision is expressed. The expert system is continuously verifying the rules against the past one-hour weather conditions and the decisions are made. The normal procedure of operations requires a formal pre-launch weather briefing held on Launch minus 1 day, which is a specific weather briefing for all areas of Space Shuttle launch operations. In this paper, the Web-based Weather Expert System of the Intelligent Launch and range Operations program is presented.
Document ID
20030065982
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Bardina, Jorge E.
(NASA Ames Research Center Moffett Field, CA, United States)
Rajkumar, T.
(Science Applications International Corp. Moffett Field, CA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Launch Vehicles And Launch Operations
Meeting Information
Meeting: International Conference on Systems, Man and Cybernetics (SMC 2003}
Location: Washington, DC
Country: United States
Start Date: October 5, 2003
End Date: October 8, 2003
Sponsors: Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available