Dynamic positioning precision acceptance inspection method of GPS positioning system

Abstract

The invention discloses a dynamic positioning precision acceptance inspection method of a GPS positioning system. The method of the invention realizes GPS positioning system dynamic precision measurement and acceptance on a high-speed dynamic target through a rocket sled test method. The method comprises the steps of fixing the GPS positioning system on a rocket pulley; configuring staring type high-speed photographing optical measuring equipment outside a rocket sled rail for performing scale marking; starting the rocket pulley, performing image recording on the rocket pulley by means of staring type high-speed image photographing optical measuring equipment in a frame frequency of 100 thousands frames per second; and calculating motion position information of a GPS positioning system receiver according to a known ground measuring result of the staring type high-speed photographing optical measuring equipment, the position of the GPS positioning system receiver on the rocket pulley and the acquired image recording information; and according to a time alignment rule, comparing the motion position information of the GPS positioning system receiver with the position information of the GPS positioning system receiver determined by the GPS positioning system, thereby improving dynamic precision of the GPS positioning system.

Description

technical field [0001] The invention relates to the technical field of GPS positioning system accuracy detection, in particular to a dynamic positioning accuracy acceptance test method of the GPS positioning system. Background technique [0002] GPS positioning system is widely used in the positioning of various moving targets, including air moving targets, sea moving targets, and land moving targets. [0003] The acceptance test methods of dynamic positioning accuracy mainly include simulation method, turntable method, closure difference method, static method and double antenna method. Among them, the turntable method is to build a rotating disk on land, install the user receiver antenna on the rotating arm, and realize dynamic positioning during the rotation process. The realization principle of the turntable method is that the target trajectory is a known circle, and the positioning error can be obtained by comparing the target trajectory measured by the GPS positioning ...

AI Technical Summary

Problems solved by technology

Although the turntable method simulates the dynamic measurement process and reflects the actual positioning method of the GPS positioning system, the accuracy can reach centimeter level, but the speed and acceleration of the turntable method are limited. When the Kalman filter method is used, if the acceleration is too large, the target will move The model will have a large difference, and the signal-to-noise ratio will decrease due to the user's receiver antenna rotating too fast, and the dynamic accuracy will decrease

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