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NCC GNSS RTK Network Accuracy Analysis
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Satellite Positioning.
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Satellite Positioning.
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The purpose of this report is to provide a detailed assessment and investigation into the performance of the Real-Time Kinematic (RTK) network Nordic Construction Company (NCC) established, as part of its aim to better leverage technology within its business, to ensure the high quality and efficiency its clients have come to expect of NCC. Within the course of this investigation, extended RTK and raw data survey sessions were undertaken at each of four baselines significant to NCC (5, 15, 25, and 35 kilometers) from three of NCC’s five RTK base stations. Subsequent analysis resulted in hard documentation of the network performances and of the fidelity of the implementation itself. The research also resulted in deliverables consisting of statistics, computations, as well as utilities that will aid in decision making and allow users to better integrate and utilize the RTK network confidently within projects.

It was found that NCC’s RTK performed essentially as expected in each circumstance and well within theory and empirical experience in terms of expected accuracies and best practices. This was concluded by comparison to accessible works by the U.S. Army Corps of Engineers and the NAVSTAR (GPS) development team. Of which are aggregated within document EM-110-1-1003 (NAVSTAR Global Positioning System Surveying) published by the U.S. Army Corps of Engineers. It is important to outline that this manual’s extensive use as a primary work throughout this report is due to authors’ trust in the publishing sources as well as the documents robust combination and illustration of theoretical and empirical content. The manual states that performance in the range of 1-3 centimeters in the horizontal and 3-10 centimeters in the vertical should be expected under the circumstances tested herein and to a majority were achieved.

Some unique observations and patterns were identified as a result of discussion with NCC and analysis of the data. Patterns in the data pointed to a number of things in regards to the time and elevation mask influence. During the morning sessions the fifteen and thirty  five kilometer baselines exhibited better performance, while conversely the five and twenty five kilometer baselines performed best in the afternoon. In regards to elevation mask, little influence was found at the five kilometer baseline length, whoever the 10° displayed the best performance at the remaining baseline lengths.

Place, publisher, year, edition, pages
2010.
Series
TRITA-GIT EX ; 10-004
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-199667OAI: oai:DiVA.org:kth-199667DiVA, id: diva2:1064820
Subject / course
Geodesy
Supervisors
Available from: 2017-01-19 Created: 2017-01-13 Last updated: 2017-01-19Bibliographically approved

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