Feasibility Study of Low Cost Receiver for Deformation Monitoring

Abstract

In the satellite navigation and positioning process, the performance of the receiver directly impacts on the quality of observation data, and affects the positioning accuracy ultimately. Therefore, the receiver is sufficiently important for the whole navigation and positioning process. Deformation monitoring belongs to precise engineering survey and it often needs to reach the millimeter-level accuracy, so that the geodetic receiver with excellent performance and high price is often used in this survey. Under this background, improving the positioning accuracy of low cost receiver and applying it to deformation monitoring can effectively reduce the engineering cost, which has great practical significance and research value. This study is based on the low cost receiver EVK-M8T from ublox company. Firstly, the receiver performance is evaluated from signal to noise ratio (SNR), receiver clock and accuracy of standard point positioning (SPP) through comparing with geodetic receiver Trimble NetR9. Then through the experiment simulation of deformation monitoring, the feasibility of deformation monitoring using low cost receiver is analyzed. The numerical results show that the location accuracy of low cost receiver can basically keep in millimeter level when the observation period reaches more than 2 h, and it can correctly detect the movement of the point. Hence low cost receiver can be applied to the deformation monitoring under the premise of improving its stability.