The Kalman Filter Method Of Free Air Anomaly Solution In Airborne Gravimetry

The airborne gravimetry is a new geophysical technique that can get high-precision and large-area gravity anomaly fast and economically through the aircraft,which has more practical significance in the regions whose conditions are relatively poor especially.And it is more superior than ground gravimetry in the aspects of manpower,material,facilities,operational convenience.The research on airborne gravimetry was started in fifties of last century abroad,while that was started to focus on the field of airborne gravimetry inland in nineties of last century.The software and hardware of domestic airborne gravimetry system are relatively backward,and the development of the airborne gravity system is still immature.For independent development of airborne gravimetry system and independent processing of airborne gravity data,this thesis studies the principle of gravity anomaly solution in airborne gravimetry and the application of Kalman filter in airborne gravity solution comprehensively,and improves the accuracy of the airborne gravity solving procedure,basing on the research of Chen Hai[2011].The main research work of this thesis is as follows:1.Studies the principle of gravity anomaly solution in airborne gravimetry,include each basic correction;2.Studies the application of Kalman filter in the vertical acceleration correction,and does model experiments of Kalman filter to verify the Kalman filtering procedure,and analysis of factors affecting the filtering effect;3.Improves airborne gravity solving procedure and finds out the part data interpolation solution algorithm,and discusses the mixer interpolation algorithm and the searching algorithm;4.Researches the effect of the original data and noise parameters to the airborne gravity solution,and perfects the early Kalman filtering procedure;5.Solves the actual data to compare the results before and after improving though quantitative analysis.