Forecast and improvement of shift error with GPS Standard Positioning Service

Author

Shimizu, Kazuki ; Suzuki, Toshiaki ; Takamura, Junichi ; Tanaka, Toshiyuki

Author_Institution

Fac. of Sci. & Technol., Keio Univ., Yokohama, Japan

Volume

2

fYear

2002

fDate

26-30 Aug. 2002

Firstpage

1645

Abstract

Recently, GPS (Global Positioning System) has been spreading rapidly. Especially, SPS (Standard Positioning Service) was improved in 2000 by releasing SA (selective availability), and now attention is being paid to it due to its reliability and usefulness. SPS is expected to be used in various fields. We have discovered that the position obtained by SPS shifts from true position. We propose a shift error reduction method using only satellites information (angle of elevation, angle of direction) from a GPS receiver. We compare the result of simulation with that of positioning experiments using the index of angle and distance. As a result, we are able to forecast the direction of the shift and the amount of the shift and also are able to improve SPS precision.

Keywords

Global Positioning System; error compensation; reliability; GPS Standard Positioning Service; GPS receiver; Global Positioning System; direction angle; elevation angle; position shift error; satellites information; selective availability; shift error reduction; Availability; Clocks; Equations; Global Positioning System; Measurement standards; Physics; Position measurement; Prediction methods; Receivers; Satellite broadcasting;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing, 2002 6th International Conference on

Print_ISBN

0-7803-7488-6

Type

conf

DOI

10.1109/ICOSP.2002.1180115

Filename

1180115