| The GPS laser ranging and positioning system is mainly composed of GPS, laser range finder and three-dimension digital compass, with the function of three-dimension spacial positioning quickly and actively. And it is real-time work and available in a large range with non-prism assistants. The design concept and its function of the system, together with the structure, characters and function of each module are discussed in detail in this paper. What is more, the data form and its reading methods are given. The communication technology among the three main modules and the computer is discussed in this paper. The coordinates of observation points can be calculated by the GPS laser ranging and positioning system through smoothing pseudoranges point positioning method with GPS data. Then the object point can be calculated by this system through several algorithms, with laser ranging data and three-dimension digital compass data.This paper mainly focuses on the following three parts:(1) Study on the composition of GPS laser ranging and positioning system. It discusses in detail the structure, character, and specific function of each module. Meantime, this paper gives the data form of GPS module, laser range finder and three-dimension digital compass.(2) Focus on the principles of pseudorange point positioning method and smoothing pseudoranges point positioning method, analyze and compare the positioning precision with these two different methods. Discuss the main error sources of pseudorange point positioning method. Put forward a proper cycle-slip processing method, and the result indicates that the cycle-slip can be rapidly and accurately detected and repaired by this method..(3) Discuss real-time quality control method and real-time data disposal method, develop programs with FORTRAN language to realize these algorithms.
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