Method for converting original measurement value of global positioning system into precise and uniform sampling in real time

Abstract

The invention discloses a method for converting an original measurement value of a global positioning system (GPS) into a precise and uniform sampling and relates to the global positioning technology. In the method, pseudo-range measurement and a carrier phase measurement value which are acquired by a receiver in real time are modified respectively by using a clock error (time difference between receiver time and GPS time) which is calculated by a GPS receiver in real time and a Doppler value which is measured in real time, so that the uniformly-sampled pseudo-range measurement and the carrier phase measurement value which are precisely synchronous with the GPS time can be obtained, and the original measurement value which is acquired by the GPS receiver in real time is converted into the uniformly-sampled measurement value which is precisely synchronous with the GPS time system. Due to the smart application of an internal relation among the receiver clock error, the Doppler valve and the GPS original measurement valve, the real-time acquisition of precise and uniformly sampled original measurement valves of pseudo-range, carrier phase and the like is realized, and the work of processing GPS data such as real-time positioning, orientation and the like is greatly facilitated.

Description

technical field [0001] The invention relates to the global positioning technology, and is a method for converting the original measurement value of the global positioning system into accurate and uniform sampling in real time. Background technique [0002] With the deepening of the technology and application of the Global Positioning System (GPS, Global Positioning System), real-time positioning and orientation using GPS has become an important means in military affairs, scientific research, and life. Since the typical positioning accuracy of a single GPS receiver can only reach 5-10 meters (medium error), the actual high-precision (sub-meter level, centimeter level) applications require two or more GPS receivers for synchronous observation and This is achieved by differential processing. [0003] When two or more GPS receivers are used for synchronous observation and data processing, the original measurement values ​​of two or more GPS receivers are required to be accurate...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for real-time conversion of the original measurement value of the global positioning system into accurate and uniform sampling, so as to solve the problem that the original measurement value collected by the GPS receiver is inaccurately synchronized with the GPS time system and the sampling is not uniform, so as to obtain the sample Uniform and GPS time-synchronized measured values

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