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Air Traffic Management Concept Baseline Definition - The Boeing ...

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Special Committees. <strong>The</strong> paper, with minor modifications, was also submitted to the<br />

International Civil Aviation Organization (ICAO) Separation Panel meeting later in 1996.<br />

<strong>The</strong> paper states that the definition of required air navigation system performance should<br />

encompass navigation, communications and monitoring (or surveillance) performance and<br />

provide a related, high level characterization of the air navigation environment, RSP. <strong>The</strong><br />

thesis of the paper is that RSP is best characterized by the traditional airspace attribute of<br />

separation minima. <strong>The</strong> paper asserts that the concept of separation minima is the primary<br />

airspace performance determinant.<br />

As indicated in Figure 2.11, for procedural environments, this separation standard is<br />

primarily related to navigation performance. In radar environments, however, with direct<br />

controller-pilot voice communications, each of the communications, navigation and<br />

surveillance (or monitoring) factors becomes important in a complex interaction of aircraft<br />

navigation, air-ground communications, radar surveillance and air traffic service-airplane<br />

interaction. Thus the concept of RSP necessarily contains elements of navigation,<br />

communications and surveillance performance. <strong>The</strong>se RSP components establish the basis<br />

for an environment in which operational access approval is explicitly performance-based,<br />

in place of current practice in which the basis of approval is indirect and implicitly related<br />

to capability, based on equipage sets including navigation sensors used.<br />

95%<br />

Navigation<br />

Performance<br />

(nm)<br />

20<br />

16<br />

12<br />

8<br />

Procedural Environments<br />

Oceanic Base Operation<br />

NATS MNPS<br />

Proposed RNP 4<br />

Standard<br />

RNP 4 with Proven<br />

Containment Standard<br />

RADAR Standard<br />

4<br />

100 80 60 40 20 0<br />

LATERAL SEPARATION MINIMA (nm)<br />

Figure 2.11 System Performance and Separations<br />

A key element to the successful definition of system performance is that the rare- and nonnormal<br />

system performance will fundamentally drive system safety-related performance.<br />

Thus, required navigation performance (RNP) must address 95% accuracy for navigation<br />

availability and navigation system integrity level supported. Similarly, for communications<br />

and monitoring, the normal, rare-normal, and non-normal (both detected and undetected<br />

failure rates) must be specified, to insure system design that will support the future mission<br />

capacity, safety and efficiency levels.<br />

21

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