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Conceptual Areas |
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AIXM was modelled as a number of Conceptual Areas. These equate to packages in the UML model structure, as shown in the diagram below:
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To illustrate the conceptual areas, a few examples are given.
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The airspace concept can represent any three dimensional region in the air that has aeronautical significance. Examples include:
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FIR |
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Air Traffic Control Sector |
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Restricted Area |
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TMA |
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Temporary Flight Restriction |
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The example below illustrates a complex airspace made of two parts. Together these two airspace parts make up a single more complex airspace. Within AIXM any 3D airspace definition is modelled as an Airspace object. The Airspace object can define a simple airspace polygon made from an altitude range and a horizontal airspace border. Alternatively, the airspace might be a complex aggregation/derivation of more primitive airspace definitions.
Finally airspaces may have a Timesheet associated with their usage. The Timesheet gives the operating/activation hours for the airspace.
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Points and Navaids Concept |
The NAVAID (VOR, DME, TACAN, NDB, MKR) and Designated Points Concept defines Significant Points in space used for navigational and air traffic control purposes. The NAVAIDS also include landing aids such as ILS, MLS. Closely related is the concept of navigation systems (GNSS, LORAN, DECCA).
This example below illustrates a TACAN with identifier BVT, which is collocated with a VOR. The BVT navigational guidance system (also called a VORTAC) has specific performance limitations outlined by the orange and yellow volumes and limited working hours.
In addition, this diagram shows a DesignatedPoint called “BVT075015”. This designated point can be defined as an angular reference and a distance from the VORTAC.
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Last validation: 27/11/2006
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