The Establishment Of The High-precision GPS Control Network In Huludao City And The Data Processing

In recent years, with the increasing maturity of GPS positioning technology, field data collection has greatly improved the accuracy and efficiency, and gradually replace the traditional mapping method, which makes modern surveying and mapping GPS and other advanced equipment to form dependency. Constantly upgrading GPS device allows the receiver frequency from the original single star single to the current dual-band multi-satellite and receiver data post-processing software is constantly updated, but any piece of software has its advantages and disadvantages, can not take into account to all aspects of the function. Therefore, we can take advantage of the processing of data between different software for joint solver, output high precision results in order to better complete the project.This paper studies the high precision GPS data processing theory, from the baseline solution and theoretical foundation network adjustment, analyzes the coordinates of the datum conversion, high-precision GPS positioning principle, high-precision baseline solution principles and methods as well as high-precision GPS network adjustment method; with two high-precision GPS data processing software and GNSS SOLUTIONS GAMIT as data processing platform, by comparing the two software and applications to identify two new data processing software advantages and disadvantages; to Two cooperating software used in the actual project, achieved its advantage in engineering applications complementary.Both research paper data processing software from Huludao City, precision GPS control network data processing began to study the data preprocessing, data processing and handling baseline, using both software processing Huludao GPS network on the basis of the Data obtained high-precision baseline document, by contrast precision baseline processing software analyzes the two handle long baseline and short baseline ability, come GNSS SOLUTIONS software in terms of short baseline solution with considerable precision GAMIT software; software obtained through the network adjustment In CGCS2000 coordinate system Coordinate Results Huludao city heads precision GPS control network, through comparative analysis of the results of the network adjustment coordinates obtained results of GNSS SOLUTIONS software solver reliability, further identified to GAMIT software with IGS survey to obtain high-precision GPS control network to initial data, GNSS SOLUTIONS software feasibility GPS control network data processing in engineering applications, but also provide some reference for building the basic framework of China-made high-precision GPS software development.