基于TDCP历元间位置变化量的GNSS地质灾害快速变形识别

Identification of Rapid Deformation in GNSS Geological Hazard Monitoring Based on the Between-Epoch Position Variation with TDCP

提出一种基于GNSS载波相位历元间差分(TDCP)位置变化量的地质灾害监测快速变形识别方法。通过TDCP解算历元间坐标变化量,识别监测体历元间显著位移,据此对卡尔曼滤波的过程噪声进行实时调节,使相对定位滤波结果能及时准确地反映监测体的快速变形。模拟实验结果表明,该方法既可以及时准确地反映监测体历元间大于1 cm的快速变形,同时又能保持mm级监测精度。

This paper proposes an approach of rapid deformation identifying in geological disaster monitoring with the GNSS time-differenced carrier phase(TDCP) algorithm.We first obtain the between-epoch displacement with the TDCP approach,and then adjust in real time the process noise of Kalman filter.Consequently,the filtered relative positioning results can quickly and accurately reflect the rapid deformation of the monitoring body.The results of simulated experiments show that this method not only reflects the rapid deformation of more than 1 cm between the epoch of the monitoring body in time and accurately,but also maintains the monitoring accuracy of mm level.