Research On GPS Leveling Models And Their Applications

International and domestic multifarious control nets in use of GPS's positioning techniques are only to solve the horizontal coordinates, but the height still follow to use the geometric leveling. Therefore how to make effectively use of the geodetic height's information of the observation of GPS to get the normal height is becoming important issue. In order to serve surveying and realizing acquirement of three dimensions coordinates in use of GPS is a very actual and meaningful topic.According to current study and existent problem, robust estimation is introduced into detection of outliers firstly. It has effectively solved the problem that gross error brings about negative effect in measurement and enhanced the credibility and the precision of the result. Secondly, the article mainly discusses the method of analytics and the method of mathematics by the geometric model analysis. According to synthetical comparison and analysis, the article combining theory with practice expresses the accurate evaluation of different fit pattern, and then produces concrete conclusion and proposal. At last, automatic data processing is carried out making use of the Matlab language.