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Abstract:
Global Navigation Satellite System (GNSS) technology has been widely used in geological disaster monitoring. However in cases where a higher risk of monitoring terminal damage is expected, geodetic GNSS receivers and antennas may be difficult to be widely used because of the price, weight and volume. As an alternative, the combination of low-cost miniaturized GNSS antenna and low-cost GNSS receiver has the advantages of low cost, light weight and small size. Low-cost receivers have been proved to achieve millimeter-level accuracy in short baselines, but there is still a certain gap between miniaturized antenna and geodetic antennas in terms of anti-jamming ability and noise factor due to the limitation of volume. Therefore, the aim of this research is to test the actual performance of low-cost miniaturized GNSS antennas and select a miniaturized antenna with the best performance. By comparing their differences in three aspects: data quality, positioning accuracy of Real-time kinematic (real-time differential positioning) and slow deformation monitoring capability, the monitoring capability of miniaturized antennas are analyzed. The results show that there is a certain gap between miniaturized antenna and geodetic antenna, but it can also meet the needs of landslide monitoring. After this, the optimal miniaturized antenna selected by the research has been applied to the Baige landslide in Xizang (western China) and achieved good monitoring effect.
