Solution Of Free Air Gravity Anomaly Of Airborne Gravity Measurement System

The gravity field of the earth plays a rather important position in the disciplines and areas of geodesy, geophysics, geodynamics, oceanography and space science, national defense construction, etc. Therefore, the study and exploration of the gravity measurement used to obtain the information of the gravity field of the earth is of great economic and military significance.The traditional ground static gravity measurement is restricted by the objective factors of terrain and etc, so it is not only inefficient, but there are geographical restrictions as well; marine gravity measurement still remains the unresolved problem of measuring efficiency of the static gravity measurement; satellite gravity measurement technique can only determine the earth’s gravity field in the long wave component. Airborn gravity measurement has superiority to ground gravity measurement in the aspects of human, material, facilities, operational convenience, so it is an effective supplementary method of ground gravity measurement and satellite gravity measurement.At present, the hardware and software of domestic airborn gravity measurement system is seriously lagging behind. For an early end to this state, and ultimately achieve the purpose of independent research and development of airborne gravity measurement system and independently process of airborne gravity measurements, this paper studies and analyses the hardware implement, the measurement process , the measurement data, the principle of gravity Solution of the airborne gravity measurement system comprehensively, and developed C language program gravity Solution software of airborne gravity measurement system, and studied the solution skills and methods of the software in the actual application, and also proposed ideas and suggestions for the further development of the study. The main research work of this paper are as follows:1. Analyzing on the airborne gravity measurement system hardwareand and its generated data file system, the paper has defined the data files,which is needed by the part of the basic correction of the airborne gravity measurement data and the calculating of gravity anomaly with Kalman filter of the airborne gravity measurement system, and their hardware source. The hardware of the airborne gravity measurement system normally includes the followingthree parts: the accelerometer used to measure the specific force, system INS used to keep the level of the accelerometer and the positioning subsystem GPS used to measure the inertial acceleration of the aircraft. The measurement process and the measurement data of the airborne gravity measurement system is the corresponding.2. The paper has researched and obtained the effective mathematical principle of the solution of free air gravity anomaly of airborne gravity measurement system basically, including data preprocessing, the basic correction and the vertical acceleration correction completed by Kalman filter .3. The paper has achieved the solution software of C language numerical calculation program based on the principle which has been researched and obtained.4. The paper has implemented a lot of solving experiments, and studied the solution skills and methods of the software in the actual application with the results of the experiments.5. The paper has proposed clear ideas and envisagings for the further development of the study.