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Positioning stability improvement with inter-system biases on multi-GNSS PPP

  • Byung-Kyu Choi EMAIL logo and Hasu Yoon
Published/Copyright: May 5, 2018
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Abstract

The availability of multiple signals from different Global Navigation Satellite System (GNSS) constellations provides opportunities for improving positioning accuracy and initial convergence time. With dual-frequency observations from the four constellations (GPS, GLONASS, Galileo, and BeiDou), it is possible to investigate combined GNSS precise point positioning (PPP) accuracy and stability. The differences between GNSS systems result in inter-system biases (ISBs). We consider several ISB values such as GPS-GLONASS, GPS-Galileo, and GPS-BeiDou. These biases are compliant with key parameters defined in the multi-GNSS PPP processing. In this study, we present a unified PPP method that sets ISB values as fixed or constant. A comprehensive analysis that includes satellite visibility, position dilution of precision, position accuracy is performed to evaluate a unified PPP method with constrained cut-off elevation angles. Compared to the conventional PPP solutions, our approach shows more stable positioning at a constrained cut-off elevation angle of 50 degrees.

Award Identifier / Grant number: 2017-1-850-08

Funding statement: This study was supported by the 2017 Primary Project of the Korea Astronomy and Space Science Institute grant 2017-1-850-08.

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Received: 2018-03-05
Accepted: 2018-04-12
Published Online: 2018-05-05
Published in Print: 2018-07-26

© 2018 Walter de Gruyter GmbH, Berlin/Boston

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