Modern methods of improving the accuracy of GPS positioning

Abstract

At mining enterprises, the use of modern geodetic devices is gaining more and more popularity. These technologies are easy to use, capable of performing complex mathematical calculations and significantly shorten the time of measurement work. Despite all their advantages, in some cases, modern devices can face certain difficulties, which can significantly affect the accuracy of measuring the coordinates of points, the time it takes to complete a job, and the efficiency of using a particular device in general. When using a GPS receiver, the most important thing is the stability of receiving data from satellites. As a rule, quarries do not always provide ideal conditions for using GPS receivers. The main problem is the complex relief of the area, which blocks the direct visibility of the satellites. Due to the formation of such a situation, the receiver is unable to function properly, causing delays in the performance of works. Such methods as D-GPS (Differential GPS), RTK (Real-Time Kinematic), PPP (Precise Point Positioning) can be used to solve this problem. The solution to improve the satellite signal can be the use of a controlled antenna, which, although complex in structure, is reasonably effective. The use of a virtual satellite, which serves as an additional satellite to correct the geometry of real satellites, is also considered. The article describes each of the methods used to improve the radio signal. Depending on the complexity of the local conditions, the requirements for accuracy and the financial capacity of the mining enterprise, any of the described methods may be used in reality.

Keywords

• gnss
• gps receive
• rtk
• gdop
• visibility of satellites
• shadow effect
• methods to improve accuracy
• gps positioning in difficult conditions