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Abstract:
High-rate positioning from Global Navigation Satellite Systems (GNSS) observations involves the acquisition of signals at a higher rate (> 1 Hz) than conventional positioning (< 0.7 Hz). This increased measurement frequency has opened possibilities for a wide range of applications, such as measuring seismic waves and monitoring tsunamis, volcanoes, and landslides. The development of low-cost GNSS receivers has made high-rate positioning more accessible and affordable for a wide range of applications. However, the performance of these low-cost GNSS receivers for high-rate measurement applications still needs to be thoroughly evaluated and analyzed to ensure their reliability and accuracy. To investigate the reliability and accuracy of low-cost GNSS receivers for high-rate positioning, we collect 6-day continuous data at 1-Hz, 2-Hz, 5-Hz, and 10-Hz frequencies from a heterogeneous network of stations equipped with geodetic, survey-grade, and navigation antennas. These stations comprise of dual (u-blox ZF9P) and single frequency (u-blox M8T) low-cost GNSS receivers. In this study, we evaluate these sets of high-rate data by comparing signal-to-noise ratio (SNR), cycle slip, dilution of precision, multipath, and precise point positioning. In addition, we assess the effects of the ultra-rapid and final precise orbit product on the PPP solutions.
