Research And Realization Of Three-axis Platform Airborne Gravity Data Processing Software

Aviation gravity measurement is one of the measurement methods to obtain the earth's gravity field.Due to its high accuracy and fast speed,gravity measurement is widely used.In this paper,a post-processing software for the measurement data of the three-axis platform aviation gravity instrument has been designed and developed.The main research contents and results of the paper are as follows:For the pre-processing stage of aviation gravity data,the quality control of the original data is strengthened,the vertical acceleration signals obtained by the gravity measurement system and the GPS navigation system are analyzed,and the 0.27 sec delay of the gravimeter signal is calculated by the correlation coefficient method to achieve the time synchronization of GPS and gravimeter data?Based on the wandering azimuth inertial navigation system,the mathematical model of the three-axis platform error is established,and the extended kalman filter is used to solve the error angle of the three-axis platform in real time.By comparing the gravity anomaly results before and after the tilt compensation of the data platform of the survey line,The proportion of correction shall not exceed 0.5%,it is concluded that the three-axis stable platform can maintain a good level,and the influence of the correction amount in the survey line on the resolution accuracy can be ignored.The correction model of aviation gravity anomaly is explained.The kalman correction results of the measured data are used to perform repeated line accuracy analysis using the vertical method,grid method 1 and grid method 2.The results are all better than 1 mGal,which shows that the gravity acquisition system performs well.Perform precision analysis at the intersection to narrow the search range and use the method of judging the intersection before finding the intersection to improve search efficiency.For the domestic three-axis platform aviation gravimeter,the secondary development was carried out on the GeoProbe platform of the geophysical data processing system,...