The Research On Data Processing Of Monitoring Crustal Deformation And Retrieval Of Atmospheric Water Vapor Using GPS

In recent years, the precision of global positioning system(GPS) has reached 10^-810^-9 in a big-scale area of several thousand kilometers and broken a new path for high precision research work in geodesy, meteorology, or other fields. The research of monitoring crustal deformation and retrieving atmospheric water vapor using GPS data from the Crustal Movement Observation Network of China(CMONOC) and International GPS Service(IGS),was made with the help of GPS satellites orbits and stations positions analysis software:GAMIT, which was designed by Massachusetts Institute of Technology in USA,and a post processing software designed by the writer himself. The main research contents and conclusions of this thesis are as follows:1. Difference of using different fiducial constraints during the course of getting the high precision baseline and coordinate results with GAMIT software was researched. Users should choose the corresponding fiducial constraint according to different needs.2. The feasibility of GPS monitoring crustal deformation was studied. With three periods of observation data from CMONOC, single-day baseline solutions were done by GAMIT software. Then, the solution results were evaluated. It is seen that the proportion errors of repetition rates of baselines in horizontal and vertical directions can be better than 10^-9 and 10^-8 separately. Also, the fixed error in vertical direction can only be 5 millimeters. All these can meet the demands of precise deformation monitoring.3. The horizontal deformation velocities and move characters of fiducial stations of Chinese mainland were analyzed. Combining three periods of single-day solution results, the horizontal deformation velocity field of fiducial stations of Chinese mainland was made out through the traditional mathematical model of floating velocity estimation. Compared with the existed results, very good agreement in velocity can be made. And the move characters of fiducial stations can be gained. The west part of Chinese mainland tends to go northward, but the east part tends to go southward.4. The crustal deformation analysis model was built up base on elastic mechanics. And it was applied in practice. Considering the important meaning in earth science of LHAS for its special geographic position, the analysis research of its strain and stresswas made. It can be evident that Lhas should bear the deformation of east-west extension and south-north compression, and the deformation of north-west south-east extension and north-east south-west compression.5. Because the traditional mathematical model of floating velocity estimation has some defects, the model of floating velocity estimation with dynamic Kalman Filter theory was established, being combined with dynamic Kalman Filter theory. And it got the realization. With many periods of data of some IGS stations, the velocities were calculated. Then, the comparation with the existed data from IGS was done. It is shown that the new method is easier and can reflect the dynamic changes of floating velociy, and its precision can also reach several millimeters to meet the need of floating velocity's estimation. So the model can provides a new effective way for floating velocity estimation.6. The calculation research of retrieving atmospheric water vapor with GPS was made, using theories of Ground Based GPS Meteorology. The data of Water Vapor Radiometer(WVR) and GPS in the same position was used. Firstly, the precipitable water vapor(PWV) array was got. Then, compared with observation data of WVR, the results show that the precision can reach 2-3 millimeters, and the feasibility and reliability of GPS in meteorology have been proved.