On the improvements of the single point positioning accuracy with Locata technology

J.-P. Montillet, L.K. Bonenberg, C.M. Hancock, G.W. Roberts

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


his work focuses on the performances of Locata technology in single point positioning using different firmware versions (v2.0 and v4.2). The main difference is that the Locata transmitters with firmware v2.0 are single frequency, whereas in the v4.2, they are dual frequency. The performance of the different firmware versions has been measured in different environments including an urban canyon-like environment and a more open environment on the roof of the Nottingham Geospatial Building.
The results obtained with firmware v4.2 show that with more available signals, cycle slips can be more easily detected, together with the improvement of the detection of multipath fading on the received signal. As a result, the noise level on the carrier phase measurements recorded with firmware v4.2 is equal on average to a third of the level of noise on the measurements recorded with firmware v2.0. In addition, with either firmware, the accuracy of the position is at the sub-centimeter level on the East and North coordinates. The Up coordinate accuracy is generally less accurate.
Original languageEnglish
Pages (from-to)273-282
Number of pages10
JournalGPS Solutions
Publication statusPublished - 2014


  • GNSS
  • Locata technology
  • Single point positioning
  • Carrier Phase signal
  • Wi-Fi
  • Dilution of precision
  • Statistics


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