Analysis and Comparison of GPS/Beidou GNSS Signal Performance

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The University of Nottingham Ningbo China (UNNC) has full access to the Beidou system, QZSS, GLONASS, Galileo and GPS on its campus. Currently UNNC has a number of GNSS receivers that can access the multi-GNSS constellation, these being a ComNav K508 triple frequency GPS/BeiDou/GLONASS system, Unicore UR240-CORS-II and UR240-RTK GPS/BeiDou receivers, Javad SIGMA and TIUMPH-VS multi GNSS receivers, Leica GR25, GR10, GS10 GPS/GLONASS receivers, Septentrio AsteRx2eL multi-GNSS receivers, as well as U-Blox NEO-7P GPS receivers. In addition to this, UNNC owns a Spirent GSS8000 GPS, GLONASS, Galileo and BeiDou hardware simulator.
Currently, it is typical to observe 30 or more GNSS satellites at any time at UNNC, allowing the campus to be an excellent test bed for such work.
This paper brings together some initial results, processed with in-house software, to illustrate the performance of the BeiDou solution, compared to the GPS solution, and a combined BeiDou/GPS solution. These tests include the results of zero baseline tests using 24 hours of GPS/BeiDou data. The results illustrate that the GPS solution has RMS values of 1.03mm, 1.22mm and 3.7mm in the East, North and Height components respectively, GPS has RMS values of 0.67mm, 0.81mm and 1.94mm in the East, North and Height components respectively, and a combined GPS+BeiDou solution has RMS values of 0.62mm, 0.69mm and 1.71mm in the East, North and Height components respectively.
Original languageEnglish
Title of host publicationFIG Working Week 2015
Subtitle of host publicationFrom the Wisdom of the Ages to the Challenges of the Modern World. Sofia, Bulgaria, 17-21 May 2015
Number of pages8
Publication statusPublished - 2015


  • GNSS
  • GPS
  • BeiDou


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