Abstract
Helical antennas have been developed that feature a cutoff pattern and are suitable for practical positioning at millimeter level. The antennas are in the form of a tube with 3 cm in diameter and 40 cm in height. The antennas provide 20-dB suppression of the reflections from the earth surface, starting from low elevations. Open sky tests have demonstrated that the multipath contribution to the real-time positioning error falls below thermal noise. By smoothing the noise, these antennas achieve a positioning accuracy of 1 mm RMS in the vertical coordinate and 0.7 mm in the horizontal in almost real time.
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Acknowledgments
The authors would like to acknowledge Dr. Lev Rapoport for developing a special version of the RTK engine.
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Tatarnikov, D.V., Stepanenko, A.P. & Astakhov, A.V. Moderately compact helix antennas with cutoff patterns for millimeter RTK positioning. GPS Solut 20, 587–594 (2016). https://doi.org/10.1007/s10291-016-0534-0
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DOI: https://doi.org/10.1007/s10291-016-0534-0