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- W2619672007 abstract "Differential GPS (DGPS) has long been recognizedas a very cost-effective testing tool to evaluate theposition and velocity accuracy of other navigationsystems. Typical Differential GPS operation involvesa reference station, installed at a precisely surveyedlocation, which provides pseudorange corrections toall users in the vicinity. With several advances incorrelation technology and multipath reduction, it isbelieved that the achievable positioning accuracy ofDGPS is on the order of a meter.A major problem associated with the single stationDGPS operation is that the accuracy degrades as theseparation between the reference station and userincreases due to spatial decorrelation. One methodto overcome this problem is to install many referencestations so that users spread over a large area willalways be in close proximity to a reference station.Obviously, this is not a desirable nor feasible solutionfor areas such as the North Atlantic Ocean.The objective of this paper is to describe ARINC’sIGS-based Differential GPS (AIDGPS) system.AIDGPS is a post-processed Wide Area DGPSsystem which derives its corrections from data fromthe International GPS Service (IGS) for Geodyna-mics. The IGS routinely provides pseudorange andcarrier phase measurements from more than 60 glob-ally distributed stations. By relying on the IGS, theAIDGPS user does not need to establish a uniquereference station network. Since the IGS network iscomprised of dual-frequency receivers, AIDGPS isable to measure and compensate for delays due tothe ionosphere.This paper will introduce the AIDGPS system anddescribe its utilization of the IGS. Detailed algorithmsand accuracy performance of the AIDGPS systemalso will be discussed." @default.
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- W2619672007 date "1995-09-15" @default.
- W2619672007 modified "2023-09-28" @default.
- W2619672007 title "Performance Evaluation of a Global IGS-Based Differential GPS System" @default.
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