Risk Levels for Rule-Based Weather Decision Aids
Abstract
Rules-based weather effects decision aids, such as the Tri-Service Integrated Weather Effects Decision Aid (T-IWEDA), is a "stop-light" type of decision aid. The rules that T-IWEDA uses for differentiating the stop-light boundaries do not sufficiently represent real-world conditions. Within each T-IWEDA band (red/yellow/green) significant variation may occur. According to Army FM-34-81-1, Battlefield Weather Effects, moderate impacts (yellow regions) cover from 25 to 75% reduced normal effectiveness. Within such a large region it is unrealistic to believe that there is not a further gradation of impacts, i.e. a slow transition from red to green, rather than three abrupt, unvarying regions. To mitigate this problem a series of weather specific curves, that transition from red to yellow to green in a continuous manner, have been developed using measured and modeled resources. Parametric curves have been developed for IR sensors, helicopters, and personnel working under varied weather conditions. For a given or forecast weather condition, these curves can be used to represent the level of risk for select systems, sub-systems or components. The technique and curves are applicable for TIWEDA and may also be used as a "penalty" within combat models.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2009
- Accession Number
- ADA513865
Entities
People
- Richard Shirkey
Organizations
- United States Army Research Laboratory