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Research on the Accuracy of Locata Single Point Positioning

Locata is a new territorial radio positioning technology. It is a great break through because GNSS cannot offer high\|precision positioning results in the “difficult area” where visible satellites are less than 4, whereas Locata can. It has great practical prospect in fields such as deformation monitoring, machine automation, urban and indoor positioning. This paper introduces methods of pseudorange and carrier phase point positioning with Locata. Based on simulation data and experiments, the paper analyses the influence of reference station number on positioning accuracy, compares the accuracy of pseudorange positioning and observed value combination positioning. It testifies that results of carrier phase positioning are stable. Experimental results indicate that the accuracy of Locata static point positioning can reach the centimeter to millimeter level.