In air navigation the use of current GPS SPS service as support to the equipped Navigation systems is in use only during less restrictive flight phase (i.e. en-route phase over oceanic areas). The satellite positioning could be in use as support to air navigation if it will satisfy the restrictive performance (stated by ICAO) parameters (RNP) that are issued with regard to flight phase in terms of availability, continuity, accuracy and integrity. Integrity is the parameter more difficult to be satisfied on vehicles with high dynamics in safety critical flight phase, such as approach and landing phases. In order to solve the GPS gap in civil air application, a solution could be provided by integration of current constellation with further satellites. The purpose of this work is to analyze the improvement provided by a augmented GPS constellation in terms of coverage and integrity. The considered space-based augmentation is composed by geostationary and geosynchronous satellites. A simulation software has been developed in MATLAB® environment in order to study the integration of existent and feasible constellations. The used indicators to evaluate coverage performance are the VSN (Visible Satellites Number) and the probability that integrity is available to be computed in autonomous.

Space-Based Augmentation for Integrity Improvement

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2010

Abstract

In air navigation the use of current GPS SPS service as support to the equipped Navigation systems is in use only during less restrictive flight phase (i.e. en-route phase over oceanic areas). The satellite positioning could be in use as support to air navigation if it will satisfy the restrictive performance (stated by ICAO) parameters (RNP) that are issued with regard to flight phase in terms of availability, continuity, accuracy and integrity. Integrity is the parameter more difficult to be satisfied on vehicles with high dynamics in safety critical flight phase, such as approach and landing phases. In order to solve the GPS gap in civil air application, a solution could be provided by integration of current constellation with further satellites. The purpose of this work is to analyze the improvement provided by a augmented GPS constellation in terms of coverage and integrity. The considered space-based augmentation is composed by geostationary and geosynchronous satellites. A simulation software has been developed in MATLAB® environment in order to study the integration of existent and feasible constellations. The used indicators to evaluate coverage performance are the VSN (Visible Satellites Number) and the probability that integrity is available to be computed in autonomous.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11367/24195
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