The Research Of The Method And The Application Of GPS Precise Deformation Monitoring Data Processing

A research on data processing models and methods of different scales of GPS monitoring networks, has been made very comprehensively through making use of the practical observation data of the big-scale Crustal Movement Observation Network of China, the medium-scale GPS crustal deformation monitoring network of some city, and the small-scale GPS dam deformation monitoring network. The main contents of this dissertation are as follows:1) A station orthogonal coordinate system, which is the reference coordinate system for the three-dimension adjustment of observation data of GPS dam deformation monitoring network, has been put forward. Further, mathematical models and formulas of the adjustment under the coordinate system have been successfully derived.2) A method of using clustering analysis in fuzzy mathematics to do the testing of relative stability of quasi-stable points(or datum marks) has been brought forward. Also, a method of quasi-stable adjustment and a software system researched and explored by Visual BASIC Language have been used to process the observation data of GPS dam deformation monitoring network..3) A mathematical model of three-dimension combined adjustment with GPS and other surveying data under station orthogonal coordinate system in deformation monitoring networks, has been brought forward. In this model, a parameterized method has been employed to decrease or eliminate vertical deflection and vertical refraction errors.4) For the long baselines of Crustal Movement Observation Network of China, using the GPS satellites orbits and stations positioning analysis software GAMIT opened up by MIT to do the single day GPS observation data processing, a synthetic solution model, which is called "the synthetic solution model of baseline vectors", has been built up with several single day baseline vectors calculated by the GAMIT software, to compute the three dimension movement velocities of sites. And the result can validate the reliability and feasibility of the model.5) The research on the concrete processing of the practical experimental observation data of some city's crustal deformation monitoring network has been done and relatively successful results have been achieved. From the calculation results, it can be seen that the horizontal and vertical scale errors of GPS baseline repetition rates can reach up to 10^-8 and 10^-6 separately in an area of 100 kilometers. And the precision of three-dimension coordinate repetition rates of monitoring sites can be around 3 millimeters.