一种新型的航空重力梯度测量数据调平方法
|
摘要
航空重力梯度测量的原始数据包含与测线方向呈强相关性的条带状噪声,该噪声会影响后续数据处理与解释的精度。首先,提出了一种针对重力梯度数据组合调平的方法,旨在去除条带状噪声的干扰。与低通滤波相比,组合调平可以保留更多的异常场细节。与传统的切割线调平相比,组合调平对切割线的依赖更小,可以适用于切割线稀疏的测量地区。最后,以加拿大Diavik地区的实测航空重力梯度数据为例,验证了组合调平方法的应用效果。
The original data of airborne gravity gradient measurement contains the stripwise noise which is strongly correlated with the direction of the survey line and will affect the accuracy of subsequent data processing and interpretation.In this paper,a combined leveling method for gravity gradient data is proposed to remove the striplike noise interference.Compared with low-pass filtering,combined leveling can preserve more details of outlier field.Compared with traditional cutting line leveling,combined leveling has less dependence on the cutting line and can be applied to the measuring area with sparse cutting line.Finally,the application effect of the combined leveling method is verified by taking the measured aerial gravity gradient data in Diavik,Canada as an example.
The original data of airborne gravity gradient measurement contains the stripwise noise which is strongly correlated with the direction of the survey line and will affect the accuracy of subsequent data processing and interpretation.In this paper,a combined leveling method for gravity gradient data is proposed to remove the striplike noise interference.Compared with low-pass filtering,combined leveling can preserve more details of outlier field.Compared with traditional cutting line leveling,combined leveling has less dependence on the cutting line and can be applied to the measuring area with sparse cutting line.Finally,the application effect of the combined leveling method is verified by taking the measured aerial gravity gradient data in Diavik,Canada as an example.
引文
[1]Foster M R,Jines W R,van der Weg K.Statistical estimation of systematia errors at intersections of lines of aeromagnetic survey data[J].Journal of Geophysical Research,1970,75(8):1507-1511.
[2]Yarger H L,Robertson R R,Wentland R L.Diurnal drift removal from aeromagnetic data using least square[J].Geophysics,1978,46(6):1148-1156.
[3]Bandy W L,Gangi A F,Morgan F D.Direct method for determining constant corrections to geophysical survey lines for reducing mis-ties[J].Geophysics,1990,55(7):885-896.
[4]Huang H P,Fraser D C.Airborne resistivity data leveling[J].Geophysics,1999,64(2):378-385.
[5]Huang H P.Airborne geophysical data leveling based online-to-line corrolationg[J]. Geophysics,2008,73(3):F83-F89.
[6]Gleave R J,Savage J E.A method of noise reduction applicable to continuous-field and other data acquired along lines[P].UK Patent:UK2274951A,1994-01-24.
[7]Davydenko,A Y,Grayver,A V.Principal component analysis for filtering and leveling of geophysical data[J].Journal of Applied Geophysics,2014,109:266-280.
[8]Zhang Q,Peng C,Lu Y M,et al.Airborne electromagnetic data levelling using principal component analysis based on flight line difference[J].Journal of Applied Geophysics,2018,151:290-297.
[9]Naudy H,Dreyer H.Essai de filtrage non-lineaire applique aux profis aeromagnetiques[J].Geophysical Prospecting,1968,16(2):171-178.
[10]Minty B R S.Simple micro-levelling for aeromagnetic data[J].Exploration Geophysics,1991,22(4):591-592
[11] Geosoft.Montaj geophysics levelling system—processing and enhancing geophysical data,extension for Oasis montaj v6.1.tutorial and user guide[EB/OL].http://www.geosoft.com.
[12]胥值礼,孟庆敏,崔志强.基于GIS的航磁实测切割线网自动调平软件[J].物探化探计算技术.2010,32(4):423-428.XU Zhi-li,MENG Qing-min,CUI Zhi-qiang.GIS-based auto-leveling software of aeromagnetic measured cross line network[J].Computing Techniques for Geophysical and Geochemical Exploration,2010,32(4):423-428.
[2]Yarger H L,Robertson R R,Wentland R L.Diurnal drift removal from aeromagnetic data using least square[J].Geophysics,1978,46(6):1148-1156.
[3]Bandy W L,Gangi A F,Morgan F D.Direct method for determining constant corrections to geophysical survey lines for reducing mis-ties[J].Geophysics,1990,55(7):885-896.
[4]Huang H P,Fraser D C.Airborne resistivity data leveling[J].Geophysics,1999,64(2):378-385.
[5]Huang H P.Airborne geophysical data leveling based online-to-line corrolationg[J]. Geophysics,2008,73(3):F83-F89.
[6]Gleave R J,Savage J E.A method of noise reduction applicable to continuous-field and other data acquired along lines[P].UK Patent:UK2274951A,1994-01-24.
[7]Davydenko,A Y,Grayver,A V.Principal component analysis for filtering and leveling of geophysical data[J].Journal of Applied Geophysics,2014,109:266-280.
[8]Zhang Q,Peng C,Lu Y M,et al.Airborne electromagnetic data levelling using principal component analysis based on flight line difference[J].Journal of Applied Geophysics,2018,151:290-297.
[9]Naudy H,Dreyer H.Essai de filtrage non-lineaire applique aux profis aeromagnetiques[J].Geophysical Prospecting,1968,16(2):171-178.
[10]Minty B R S.Simple micro-levelling for aeromagnetic data[J].Exploration Geophysics,1991,22(4):591-592
[11] Geosoft.Montaj geophysics levelling system—processing and enhancing geophysical data,extension for Oasis montaj v6.1.tutorial and user guide[EB/OL].http://www.geosoft.com.
[12]胥值礼,孟庆敏,崔志强.基于GIS的航磁实测切割线网自动调平软件[J].物探化探计算技术.2010,32(4):423-428.XU Zhi-li,MENG Qing-min,CUI Zhi-qiang.GIS-based auto-leveling software of aeromagnetic measured cross line network[J].Computing Techniques for Geophysical and Geochemical Exploration,2010,32(4):423-428.