GPS Integrity Channel*

Braff, Ronald; Shively, Curtis A.

doi:10.1002/j.2161-4296.1985.tb00915.x

Cited by 14 publications

(7 citation statements)

References 3 publications

(1 reference statement)

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“…(3) To locate the edges of the individual circles of visibility in geodetic coordinates, it was necessary to compute points around the circle in angle increments, computing each edge coordinate pair given the following: (1) the center coordinate pair for the circle of visibility (the visibility point); (2) the geodesic radius of the circle of visibility;…”

Section: Appendix Computer Software Developed To Analyze Different Comentioning

confidence: 99%

“…The FAA has determined, however, that a method for assuring the integrity of the GPS signals in space must be developed to meet the 10-second pilot notification time currently required for nonprecision approach navigation aids. One method for providing the necessary GPS integrity is to use an independent ground monitoring network along with a channel to broadcast the GPS signal status to the aviation users [2].…”

mentioning

confidence: 99%

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Independent Ground Monitor Coverage of GPS Satellites

Viets

1987

IEEE Trans. Aerosp. Electron. Syst.

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Section: Appendix Computer Software Developed To Analyze Different Comentioning

confidence: 99%

mentioning

confidence: 99%

Independent Ground Monitor Coverage of GPS Satellites

Viets

1987

IEEE Trans. Aerosp. Electron. Syst.

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“…It is obvious that central integrity monitoring schemes must include ground monitoring stations in areas they serve. The scheme described in [6] was designed to serve CONUS only. It is pointed out in 1121 that even if there were an eventual decision to expand to a global integrity monitoring network, geographic inaccessibility (e.g., some ocean areas) or simply a lack of interest in some parts of the world would cause gaps in coverage.…”

Section: Coveragementioning

confidence: 99%

“…The capability to accomplish civil/military interoperability of integrity schemes requires compatibility of user equipment. As discussed below, military user equipment would be incompatible with integrity messages generated in a central integrity monitoring scheme and disseminated as proposed in either [6] or 1121. Thus, only autonomous integrity monitoring schemes are capable of preserving the current levels of civil/military standardization and compatibility.…”

Section: Civil/military In Teroperabilitymentioning

confidence: 99%

Choosing the Best Solution to the GPS Integrity and Coverage Issues

Damiani

Hemesath

1988

Navigation

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The FAA has stated that use of the GPS as a sole means civil aviation radionavigation system requires that a user be quickly notified of out‐of‐tolerance conditions (the “integrity” issue), and that the system provide adequate coverage even with satellite failures (the “coverage” issue). These FAA concerns have prompted numerous research studies aimed at warning GPS users of anomalous conditions and improving satellite coverage. Approaches to the integrity issue include implementation of ground‐based monitor stations to evaluate GPS signals (combined with various techniques for disseminating warnings to users), and processing of redundant data within the GPS receiver to detect anomalies and autonomously provide warning. Approaches to the coverage issue include expansion of the Department of Defense (DoD) constellation to 24 semisynchronous satellites, augmentation by dedicated geosynchronous GPS satellites, and addition of a civil GPS payload on existing geosynchronous civil weather satellites. Numerous publications have focused on technical solutions; however, selection of the best approach to resolving the coverage and integrity issues involves operational, institutional, economic, and international tradeoffs as well. This paper compares alternatives from these perspectives, using as a guide the criteria used in the Federal Radionavigation Plan for selection of a radionavigation system mix.

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“…1 " 10 Here integrity means the system's ability to provide timely warnings to users as to when it should not be used. The main concern is over the safety in navigation with GPS and the possibility that a GPS satellite may transmit an erroneous navigation signal to the user.…”

Section: Introductionmentioning

confidence: 99%

Failure detection and isolation structure for global positioning system autonomous integrity monitoring

Lin

1995

Journal of Guidance, Control, and Dynamics

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In this paper, a new failure detection and isolation (FDI) structure is investigated for global positioning system (GPS) integrity monitoring in an integrated inertial navigation system (INS)/GPS navigation system. In the structure, a bank of auxiliary integrated INS/GPS Kalman filters, each of them processing a subset of the GPS measurements, are applied to provide high-accuracy detection references. The failure detection is then undertaken by checking the consistency between the state estimate of the main integrated INS/GPS Kalman filter and the auxiliaries. Two state propagators are also included in the FDI structure to reliably isolate the failed GPS measurement. The two propagators are alternatively reset with the data of the Kalman filter to increase their accuracy and thereby the failure isolation performance. The failure isolation is realized by testing the consistency between the state estimates of the auxiliary Kalman filters and the state propagator. The simulation results show that the FDI structure is capable of not only detecting the presence of a malfunctioning satellite that results in a large range error, but also identifying which satellite is malfunctioning.

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GPS Integrity Channel*

Cited by 14 publications

References 3 publications

Independent Ground Monitor Coverage of GPS Satellites

Independent Ground Monitor Coverage of GPS Satellites

Choosing the Best Solution to the GPS Integrity and Coverage Issues

Failure detection and isolation structure for global positioning system autonomous integrity monitoring

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