The Positioning Accuracy Assessment of Low-Cost GNSS Receiver for the Use of Landslide Monitoring

Abstract

Nowadays, the Global Navigation Satellite System (GNSS) is widely used for monitoring land movement because relative survey techniques and geodetic GNSS receivers' performance can provide high positioning accuracy. However, due to their high cost, geodetic GNSS receivers have limitations when monitoring land movement. This research evaluates positioning accuracy using low-cost GNSS receivers composed of u-blox ZEDF9P receiver boards and antennas. The study employs the real-time kinematic (RTK) survey technique, providing accurate real-time positions. The researchers simulate land displacement using a low-cost GNSS receiver and a geodetic GNSS receiver set on pillars that can move horizontally and vertically. The test is conducted in horizontal and vertical displacements to evaluate and compare the results from the low-cost and geodetic GNSS receivers with the actual displacements. The test results showed that the low-cost GNSS receiver provides better centimeter-level positioning accuracy and has slightly inferior accuracy than the geodetic GNSS receiver.