Carl Westin

3-3 Method 45 1. Integrated the SSD with the plan view display (PVD). The intention was to improve controllers’ understanding between the spatial position of aircraft B on the PVD and its associated conflict region in the SSD of the selected aircraft A. The original SSD is presented in a separate display. 2. Introduced function that highlights all aircraft in conflict with a selected air- craft to support controllers’ conflict detection and attentional control. 3. Limited conflict region look-ahead time to eight minutes. En-route controllers tend to resolve conflicts that occur on a short time frame. 4. Introduced color-coded conflict regions to reflect conflict proximity in time (yellow 2-5 min, red 0-2 min). 5. Limited SSD to an aircraft’s heading envelope to better reflect en-route con- trol. This resulted in a representation of conflict regions restricted to an air- craft’s current speed (i.e., heading band). The original SSD visualizes both the heading and speed envelope of an aircraft. Conflict resolution in en-route control is often restricted to heading changes (alternatively vertical) because aircraft, at high altitudes, operate close to their maximum performance enve- lope and therefore have a narrow control space for speed. Figure 3-2(a) depicts a typical aircraft plot, as used in the simulation. Fig- ure 3-2(b) shows the SSD overlay that is superimposed on that plot when the plot is clicked upon. Figure 3-2(b) shows the aircraft on a heading of roughly 310 degrees, a conflict-free trajectory as indicated by the dashed segment of the heading band. ZM9694 230 290 AKON Aircraft label Velocity vector Aircraft symbol History dots (a) Aircraft plot ZM9694 230 290 AKON go area no-go area (b) SSD F IGURE 3-2: Close-up of the simulation screen showing standard aircraft plot (a) and SSD overlay (b).