Research On Beidou High Precision Positioning Method Based On Analytic Hierarchy Process

At present,the beidou satellite navigation system has entered into the accelerated development stage,it has launched a wide range of applications in agriculture,electricity,fire protection,shipping industries,with its characteristics of all-weather,automation,high precision,at the same time,the study of improving the accuracy of its positioning has never stopped.In this paper,the high-precision positioning method of beidou is studied and the practical application is obtained.Carrier phase static relative positioning method is widely used in surveying and mapping because of its high positioning accuracy.By collecting long time and large amount of satellite observation data,the method of least squares adjustment is applied to solve the baseline vector between the base station and the monitoring station,so as to obtain the positioning result of "millimeter".However,during this period,the satellite spatial distribution will change and the weather will change.Therefore,the quality of satellite data is different.Based on this,the optimization method is proposed in this paper.First of all,in this paper,the satellite observation data of a long period of time is refined into multiple sub-periods and the positioning results of each sub-period are calculated,According to the difference of satellite data quality in each sub-period,the weight of each sub-positioning result is different;Secondly,the Analytic Hierarchy Process(AHP)is used to calculate the positioning reliability of each sub-segment by influencing the element of positioning accuracy.At the same time,this paper makes a comparison between experiment and traditional static relative localization algorithm,and verifies the effectiveness of this algorithm.In this paper,an information-based monitoring platform is designed for the above methods.The platform realizes real-time acquisition and display of sensor data in construction field,and also provides a diachron-time query and data report function,which has achieved good application results.