Positioning principle and engineering application practice of Inertial Navigation System RTK technology

When using the traditional real-time dynamic positioning (RTK) technology, one must keep the antenna phase center of the Global Navigation Satellite System (GNSS) receiver relatively perpendicular to the measurement point during the measurement to ensure the accuracy of the measurement results. Generally a tripod should be erected. When using the centering rod for measurement, the surveyor must ensure that the leveling bubble of the centering rod call is relatively centered in order to ensure the accuracy of the measurement results. The measurement process is time-consuming and laborious. The emergence of Inertial Navigation System (INS) technology has changed the traditional habit of RTK Surveying and mapping technology. In the measurement process, there is generally no need to erect a tripod, and the measuring centering rod maintain an arbitrary tilt state within a certain range. The measurement process is relatively easy and free, which greatly reduces the labor intensity of measurement and improves the efficiency of surveying and mapping. This paper mainly analyzes the positioning principle and technical advantages of INS technology, and emphasizes that only by mastering the precautions of INS RTK technology in practical application, can it give full play to its maximum benefit and efficiency.