A fast and accurate centimeter-level single-point positioning method

Abstract

The invention relates to a fast and accurate centimeter-level single-point positioning method. The present invention solves the problems of poor positioning accuracy, long positioning time, and great influence of weather and location factors in the existing satellite positioning system, and provides a fast and accurate single-point positioning method. Multi-system navigation message and interplanetary differential correction data, the receiver converts the navigation message and correction data into WGS84 coordinate system coordinates through preliminary processing, and the control system jointly solves the coordinate data to obtain precise positioning data. The beneficial effect of the invention is that it can realize the coordinate measurement with an accuracy within 10cm within 30 minutes under the condition of no obstruction around, which makes up for the shortage in the market.

Description

technical field [0001] The invention relates to the technical field of satellite positioning and interstellar differential positioning. Background technique [0002] The positioning accuracy of traditional civilian satellite single-point positioning equipment is generally about 5 to 10 meters, and the positioning accuracy of military positioning equipment can reach a maximum of about 1 meter. If you need to obtain higher single-point positioning measurement accuracy data, you can receive the positioning measurement data at a fixed measurement position for a long time, and use the average algorithm to converge the measurement accuracy to achieve higher-precision single-point positioning measurement data. However, the convergence time of this method is usually several days, and the positioning time is too long, which causes the weather, atmosphere, satellite position, earth tide and other factors to have a greater impact on the data accuracy, which limits the measurement accur...

AI Technical Summary

Problems solved by technology

However, the convergence time of this method is usually as long as several days. If the positioning time is too long, factors such as weather, atmosphere, satellite position, and earth tides will have a greater impact on the data accuracy. This limits the measurement accuracy of single-point positioning and affects the measurement accuracy. limited improvement

The surveying and mapping industry usually uses differential positioning equipment for centimeter-level and millimeter-level high-precision measurement. The relative distance measurement accuracy of the differential positioning system is very high, but if you want to accurately measure the position coordinates, you need to differentiate the coordinates of a known point to obtain the coordinates of the target point. Most of the coordinates of known points are obtained by single-point positioning, so the coordinates obtained by the differential positioning system are accurate relative to known points, but have a large error relative to the reference origin of the earth coordinate system

[0003] This manual will detail a fast and accurate single-point satellite positioning method to solve the above-mentioned problems such as low accuracy of earth coordinate measurement data and long positioning time of current single-point positioning and differential positioning equipment, and realize centimeter-level accurate earth coordinate measurement of a single point

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