Airspace Design and Environmental Analysis

Dynamic Noise Avoidance Planner

Overview
The development and implementation of a concept for injecting information related to noise sensitivity into the sequencing and scheduling logic of CTAS terminal area DSTs such as Expedite Departure Path (EDP) and the Final Approach Spacing tool (FAST) is the goal of the Departure Noise Avoidance Planner research.

Research Development
Refinement of the Phase I DNAP Design Interface DNAP Algorithms with CTAS Integrated Operation of CTAS and DNAP and Estimation of Benefits

Benefits
Benefits were analyzed in arrival mode over a 22-day period for CTAS operation at DFW. In this mode, reductions in population counts in several bands of DNL exposure were achieved in the range of approximately 1 to 10 percent (higher in some cases). These benefits can be expected to increase when DNAP is operated in departure mode due to the greater variability of departure vectoring and the generally larger noise impact of departure operations.

Design Approach
We have explored two major design approaches to DNAP implementation, one based on a library of noise exposures computed before each flight is processed by DNAP, and one based on computation of noise exposures simultaneously with DNAP flight processing. We have established a set of quantitative objectives to guide DNAP algorithms in their search for flight trajectories that reduce overall noise impact. We have investigated several DNAP trajectory recommendation algorithms and utilized two of them in the quantitative assessment of benefits.

Steps Involved with Generating DNAP Noise Advisories for CTAS Terminal Area Routing

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