GNSS Solutions (UK) Limited recently hired a new Hemisphere GNSS S321 RTK system to Vertex Air Limited of Rotherham. Vertex Air use AscTec Falcon 8 UAVs for photogrammetry surveys and they needed the S321 to accurately geolocate Ground Control Points which improves accuracy, scale and orientation. The system was supplied with a TopNET UK RTK licence, and with the S321’s combination of Surefix to guarantee centimetre level accuracy and aRTK as a backup to the RTK network the campaign went without a hitch.

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