Study On Gravity Data Processing Solution Of GT-1A Airborne Gravity System

The thesis set the GT-1A airborne gravity measurement system which was introduced by China in 2007 from Russia Moscow State Technical University and the gravity measurement technology companies as background,based on the GT-1A measured data in Nantong. Focused on observation data and the post-processing procedures GT-1A gravity surveying system and the theory and methods of Kalman filtering. Discussion focused on how to free air gravity anomaly of GT-1A airborne gravity surveying data.Firstly, the thesis introduced the mathematical model based on Newton’s second law of motion, the establishment of aplatform-style, Strap-vector gravity measurements, and strap, rotation invariant scalar gravimetry peaceful desktop. Secondly, introduced the GT-1A airborne gravity measurement system hardware and software systems, collecting data packets. And then correct and process the initial airborne gravimetry data. In the thesis studied the Eotvos Correctons, eccentric correction, horizontal acceleration corrections, vertical acceleration corrections, free-air correction and normal field correction, selected the most suitable formula using for the filtering process for GT-1A gravity measurement system. Finally, studied the Kalman filter theory, choosing the most suitable Kalman filter for GT-1A gravity measurement system. And in accordance with the measured data and the statistical characteristics of noise and GT-1A measurement system operating principles for the derivation of the Kalman filter Including its state equation and observation equation derivation, establish the corresponding model, and programming.The main contents are as follows:1、The first of analyzing all hardware and software system of GT-1A as a whole sort of, giving their methods of measurement and integrity of data processing information.2、Combined Kalman interative update theory with GPS data and gravity measuremengt of random response model of GT-1A airborne gravimetry system, and use Kalman filtering method in the gravity meter calibration and error correction of INS level platforms.3、Uesd Kalman filter in Non-navigation and motion control systems, and used self-adaptive Kalman filter to study GT-1A airborne gravity anomalies formula calculated, gives a filter design, and conduct programs to achieve. With the GT -1A airborne gravity survey in Nantong, a flight data filtering, through analysis and comparison with the measured data to verify the correctness and effectiveness of the Kalman filter.