High-precision point positioning method and system for global navigation satellite system (GNSS)

Abstract

The invention provides a high-precision point positioning method and a high-precision point positioning system for a global navigation satellite system (GNSS). The method comprises the following steps: prestoring an observed value positioning equation with commonality for a compass navigation satellite system, a GPS, a GLONASS and a Galileo satellite navigation system, and interconvertible parameters of coordinate systems and time systems of the various satellite navigation systems into a storage module of a double-frequency GPS receiver; receiving signals of the various satellite navigation systems by the double-frequency GPS receiver through an antenna, and converting the signals into digital signals by a signal converting unit; reading the interconvertible parameters in the storage module and the observed value positioning equation by a data processing unit to process the digital signals; finally obtaining a high-quality PVT result; realizing the combination use of observed quantities and ephemerides of the various satellite navigation systems; and sending the PVT result to a field data acquisition device for recording. The method and the system realize the compatible high-precision point positioning based on the compass navigation satellite system/the GPS/the GLONASS/the Galileo satellite navigation system, and can provide point positioning position information with higher quality.

Description

technical field [0001] The invention relates to the technical field of satellite positioning, in particular to a global navigation satellite system (GNSS) high-precision single-point positioning method and system. Background technique [0002] Since the establishment of the Global Positioning System (GPS) in 1993, satellite positioning technology has been widely used in mobile target monitoring, measurement, navigation, timing, space technology, etc., and has become the third new IT growth point after communications and the Internet. Location-based information service (LBS) will be one of the broadest, most potential and most attractive development directions of satellite navigation and positioning technology in the future. Following GPS, the former Soviet Union established the GOLNASS satellite positioning system, the European Union is building the GALILEO satellite positioning system, and my country is developing the Beidou (BEIDOU) navigation satellite system. Internatio...

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Problems solved by technology

[0003] The working modes of satellite positioning mainly include: traditional static positioning mode, which has a long observation time per point and high precision (up to mm level), which is suitable for high-precision control point measurement; real-time dynamic differential positioning (RTK) mode, This method has the characteristics of high precision and fast speed, but the working range is limited, generally no more than 15 kilometers, and it needs to establish a base station and real-time data communic

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