複数基準局の利用によるGPS測位精度の改善

概要

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DGPS (differential GPS) enables realtime positioning accurate within a few meters. DGPS user equipments receive, in addition to ranging signal from GPS satellites, correction information generated at and transmitted from a reference receiver station fixed on the ground. Recently some DGPS networks are available which broadcast correction information to users being in the coverage. In general, users select the nearest single reference station out of two or more available stations. Because of its dependency on the relative location between user and reference station, DGPS positioning accuracy might be improved by using correction information of multiple reference stations. We will explain the method to apply multiple correction information simultaneously to the correction algorithm, and show experimental results that indicate the effects of using multiple reference stations. It will be shown that weighting to each reference station by the distance from user receiver is effective for long baseline distance, but has little effect for short baseline.
社団法人日本航海学会の論文
1999-09-25