Wide-Lane Ambiguity Support as an Enabler of Low Cost, Dual-Band Precision GNSS Performance in Modern, Large Scale Correction Networks

Daniel Burr, Mike Horton

Abstract: This paper demonstrates how the implementation of support for wide-lane ambiguity resolution in low cost, dual-band GNSS receivers can enable seamless, high-accuracy applications at a continental scale. Results are detailed using correction data from Swift Navigation’s Skylark™ Precise Positioning Service in combination with different positioning engines. Many different approaches for GNSS corrections have been devised during the past few decades, each having their own strengths and weaknesses. For mass-market applications, the ideal correction technology is one which converges quickly, is applicable across a wide area and reliably provides the desired level of accuracy. A number of commercial services available today, such as Skylark, promise centimetre-level accuracy at continental scale with convergence times measured in seconds. Complementing the availability of continental-scale correction services, rapid growth can be observed in cost-effective, dual-band GNSS chipsets over the previous few years. These devices are frequently used in small, industry-standard footprint modules and offer a path to achieving levels of performance previously associated with much higher cost hardware. With mass-market deployment of chipsets capable of consuming corrections, it is to be expected that many new verticals will benefit from higher accuracy positioning. Testing results establish a performance baseline with RTKLIB and analyse the performance improvement which can be obtained through the use of a positioning engine with support for wide-lane ambiguity resolution. The wide-lane capable positioning engines tested were: a modified version of RTKLIB, EmbedCM™ from HYFIX and Starling® from Swift Navigation. High-level results using RTKLIB with Skylark corrections demonstrate an improvement in 1? Horizontal Accuracy from 29.6 cm (baseline) to 17.0 cm (wide-lane). Similar results were demonstrated with the EmbedCM and Starling positioning engines and will be presented in the paper.
Published in: Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022)
September 19 - 23, 2022
Hyatt Regency Denver
Denver, Colorado
Pages: 653 - 666
Cite this article: Burr, Daniel, Horton, Mike, "Wide-Lane Ambiguity Support as an Enabler of Low Cost, Dual-Band Precision GNSS Performance in Modern, Large Scale Correction Networks," Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, Colorado, September 2022, pp. 653-666.
https://doi.org/10.33012/2022.18402
Full Paper: ION Members/Non-Members: 1 Download Credit
Sign In