关键词: 低成本, 亚米级, CORS, 单频, RTK

Abstract: Global satellite navigation positioning (GNSS) technology provides an effective means of real-time positioning for industries. Currently widely used real-time GNSS positioning technology can be divided into two types, one is low-cost positioning technology, which uses cheap chips and antennas, mainly used in mobile phones, shared bicycles and bus positioning, etc. The other is high precision GNSS positioning technology, which uses network RTK technology combined with geodesy antennas and receivers to provide real-time centimeter-level services for high-precision survey users. With the development of technologies such as the Internet of things and 5G, the requirements of real-time sub-meter and decimeter-level positioning are gradually increasing. The original low-cost GNSS positioning technology cannot meet this precision requirement, and the high-precision positioning equipment is expensive and cannot be used in the mass-market. Therefore, this paper implements a low-cost differential positioning equipment based on CORS. The equipment consists of two parts: external devices and mobile phone. Experiments show that after accessing the CORS, the positioning precision of the horizontal can reach sub-meter level with the accurate VRS observations of the CORS. This paper has certain significance for promoting the wide application of CORS.

Key words: low-cost, sub-meter level, CORS, single frequency, RTK