Quantify and Explain the Differences in Horizontal Accuracies Between Commercial CORS Networks

Venaglia, Michael (2019) Quantify and Explain the Differences in Horizontal Accuracies Between Commercial CORS Networks. [USQ Project]

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Real Time Kinematic (RTK) surveying found its roots in the mid 1990’s, giving surveyors the opportunity to carry out real time measurements using GPS signals with low ranges of accuracy. With single base RTK limiting accuracy at longer ranges network RTK has been implemented to provide precise corrections via cellular networks.

Increased reliable network RTK and satellite coverage has given more opportunities for surveyors to use this technology. Commercial network RTK providers now have means to be able to provide corrections to surveyors in most urbanised areas in Australia. From conducting a thorough literature review, a noticeable lack of field testing has been carried out to see if any of the commercial CORS networks that are available throughout Australia deliver different horizontal accuracies, and where the sources of these differences originate from.

Methodology is formulated in this report so that field testing can be carried out to substantiate these theories. Appreciation of the similar studies that have been undertaken in the past have helped shape measurement procedures, site selection and the equipment to be used for this research project. Two permanent marks that are linked to the cadastral network in South East Queensland will be measured by network RTK with corrections supplied by three private CORS networks. From the analysis of the data captured in the field a series of conclusions and recommendations will be presented in the final dissertation.

Results obtained from field data indicates that small differences seen between networks. This has been determined to originate from variances in CORS networks and baseline lengths used to perform measurements. However, the differences observed are at a smaller magnitude than the accuracy specifications of the equipment used to perform fieldwork.

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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: McAlister, Chris
Qualification: Bachelor of Spatial Science (Honours) (Surveying)
Date Deposited: 24 Aug 2021 01:09
Last Modified: 27 Jun 2023 04:09
URI: https://sear.unisq.edu.au/id/eprint/43163

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