Research On Fusion Of Multi-dimension Multi-scale Gravity And Magnetic Potential Field Data

With the application and development of multiple geophysical observation methods,in order to better solve a certain geological problem,different “scales”(scale or precision)and different “dimensions”(satellites,aviation,ground and ocean,etc.)gravity and magnetic potential field data are observed or collected in different times.This has caused problems such as differences in scale or accuracy,height differences,and even differences in potential field data in the gravity and magnetic potential field data collected in the same area.How to fuse these different "scales" and different "dimensions" of the gravity and magnetic potential field data into the same "scale" and the same "dimension" has become one of the key issues in the fusion of gravity and magnetic potential field data.According to the differences of "dimensions" and "scales" of the observation data,the fusion of multi-dimension and multi-scale gravity and magnetic data is divided into singledimension and multi-dimension,single-scale and multi-scale.In view of the differences in the observation position(dimension),background and observation scale or accuracy(scale)of the multi-dimension and multi-scale gravity and magnetic potential field data,a set of fusion methods suitable for multi-dimension and multi-scale gravity and magnetic potential field data are proposed based on the characteristics of gravity and magnetic potential field data.The spatial domain iterative continuation method is used to complete the unification of dimensions and solve the problem of observation height differences.The regression analysis method is used to complete the unification of background differences and solve the problem of background differences.The weighted average method is used to complete the unification of scales and solve the problem of observation accuracy or scale difference.Finally,the multi-dimension and multi-scale gravity and magnetic potential field data obtained by different observation methods are calculated to the same plane or surface under the same standard.Model testing and real field data processing results showed that the fusion method in this paper had a good effect in the fusion of multi-dimension and multi-scale gravity and magnetic data.The calculation error is and conforms to the characteristics of potential field data with high calculation stability and efficiency.The data fusion method of multi-dimension and multi-scale gravity and magnetic potential field in this paper can be applied to the fusion of the gravity and magnetic potential field data of aviation,ground and ocean observations,and has good application prospects and promotion value.