Wide-area kinematic positioning with BeiDou triple-frequency signals

Abstract

Article free to read on jounal website. A key challenge of wide-area kinematic positioning using the BeiDou system is to reduce the effects of the elevation-dependent hardware biases in code signals. Based on three geometry-free/ionosphere-free combinations, the elevation-dependent code biases are modeled for all BeiDou satellites. Results from the data sets for 5 baselines of 533 to 2545 km demonstrate that the wide-lane (WL) integer-fixing success rates of 95% to 99% can be achieved within 50 independent epochs. Under the condition of HDOP less than 2, the overall RMS statistics of ionospheric-free WL single-epoch solutions achieve 24 to 50 cm in the horizontal direction. Smoothing processing over the moving window of 40 epochs reduces the RMS values by a factor of about 2. Considering the distance-independent nature, the above results show the potential for achieving reliable and high-precision positioning with sparsely distributed ground stations regionally or globally.