EUROCONTROL - Tactical Load Smoother (TLS)
 
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Tactical Load Smoother (TLS)

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The PHARE Tactical Load Smoother (TLS) was developed to be an aid to controllers in the multi-sector-planning rôle known as Multi-Sector Planners (MSPs).
  Link to Multi-Sector Planning Concept
A view of the Tactical Load Smoother  
A view of the Tactical Load Smoother (Click image for a larger view)  
The main purpose of a Tactical Load Smoother is to predict and then analyse the air-traffic situation that will evolve some tens of minutes later in the Multi-Sector Area (MSA) with which it is associated. The purpose of the analysis is to determine the "complexity" of the predicted air-traffic situation, resulting in the generation of relevant indicators for the Multi Sector Planner.

There are 3 main indicators of future complexity in the Multi-Sector Area: the total number of aircraft; the number of conflicts; the complexity of the trajectories as assessed by number of vector changes. The look-ahead time ranges from 10 to 40 minutes.

These three types of indicator can be displayed to the Multi Sector Planner for each sector in the form of a Traffic Load Graph, a Problem Load Graph, and a Complexity Graph respectively. For each of these, a threshold level can be set. When all the plotted values for a particular sector are below the appropriate threshold, the controllers responsible for that sector should have no problem performing their tasks.
  A view of the Tactical Load Smoother
  A view of the Tactical Load Smoother (Click image for a larger view)
If one (or more) of the values passes the threshold level, an alarm can be generated to indicate to the Multi Sector Planner that the air-traffic situation in that sector is predicted to be becoming complex.

Before the Multi Sector Planner can take action more precise information about the predicted air-traffic situation is required. Therefore, the Tactical Load Smoother software can also generate information about the level of complexity of the predicted air-traffic situation at a particular moment of time as a function of ground position. This information can be displayed on a Complexity Map. A Complexity Map is generated for the whole of the Multi-Sector Area (MSA). The main purpose of the Complexity Map is to indicate regions where the local complexity of the predicted air-traffic situation is too high. Such a localised region of high complexity is known as a “hot spot”. The Multi Sector Planner can interrogate the Tactical Load Smoother software to determine the identity of the aircraft whose planned trajectories are predicted to generate a particular hot spot.

For further information

The Tactical Load Smoother is documented in:
  Acrobat 97-70-15 PD/3 IOCP Programme: En-route Multi Sector Planning Procedures (1,236 Kb)
  Acrobat 98-70-18 PATs Project Final Report Volume 1 (880 Kb)
  Acrobat 98-70-18 PATs Project Final Report Volume 9 Tactical Load Smoother (436 Kb)