The usefulness of network-based multi-GNSS delivery under adverse conditions [Case Study]

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last updated：Jul 03, 2018

ジェノバ

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Demonstrating the usefulness of multi-GNSS under adverse conditions where receiving satellites are likely to be limited.

In the verification of network-type RTK-GPS on the barge, it was difficult to obtain a FIX solution due to the influence of unloading arms and cranes as we approached the barge, making it unsuitable for precise guidance. This time, we compared the positioning accuracy of RTK positioning using network-type GNSS distribution with GPS only and examined the usefulness of multi-GNSS in relation to the impact of surrounding structures. 【Results】 ■ Multi-GNSS consistently has more received satellites than GPS. Therefore, the impact on positioning accuracy due to satellite switching is minimal. ■ Distribution of positioning results for GPS and Multi-GNSS when there are few obstructions. Multi-GNSS shows smaller dispersion and standard deviation in the horizontal plane (2D), resulting in higher positioning accuracy. ■ Distribution of positioning results for GPS and Multi-GNSS when there are many obstructions. Multi-GNSS has greater dispersion and standard deviation in the horizontal plane (2D) compared to when there are few obstructions. While the positioning accuracy is slightly lower, it is still higher than the FLOAT of GPS only because RTK-FIX is achieved. *For more details, please refer to the PDF document or feel free to contact us.