一种优化的航空重力测量测线交叉点算法
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摘要
针对目前航空重力测量数据处理中常规搜索方法存在搜索速度慢、正确率低、适用范围窄的不足,该文提出一种滑动窗口求解法。该方法以主测线点为搜索中心,采用一定大小的搜索半径对主副测线点进行搜索,将搜索到的主副测线上相邻两点组成线段序列,运用行列式法、投影法、面积法3种判断准则精确求取交叉点及不符值。通过实际算例,从搜索时间和正确率两方面对滑动窗口求解算法进行了讨论分析。结果表明,该文所提方法简单有效,能明显提高测线交叉点搜索效率,减少工作量。
Aiming at the shortcomings such as slow search speed,low correct rate and poor applicability of the conventional search methods in airborne gravity measurement data processing,a sliding window solve method was proposed that the main line point was regarded as the search center,the main and sub line points were searched in a certain size of search box,the adjacent measuring points detected in the main and auxiliary lines formed a line segment,and the intersection and discrepancy were determined using the determinant method,projection method and area method.Through practical examples,the sliding window solve method was discussed and analyzed from the aspects of search time and accuracy.The results showed that the proposed method was simple and efficient,where the searching efficiency of crosspoint was improved and the workload was reduced significantly.
Aiming at the shortcomings such as slow search speed,low correct rate and poor applicability of the conventional search methods in airborne gravity measurement data processing,a sliding window solve method was proposed that the main line point was regarded as the search center,the main and sub line points were searched in a certain size of search box,the adjacent measuring points detected in the main and auxiliary lines formed a line segment,and the intersection and discrepancy were determined using the determinant method,projection method and area method.Through practical examples,the sliding window solve method was discussed and analyzed from the aspects of search time and accuracy.The results showed that the proposed method was simple and efficient,where the searching efficiency of crosspoint was improved and the workload was reduced significantly.
引文
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[11]高巍.重力测线截取与交叉点搜索算法研究[C]∥2014年惯性技术发展动态发展方向研讨会文集.[出版地不详:出版者不详],2014:57-60.(GAO Wei.Gravity survey intercept and cross-point search algorithm[C]∥Proceeding of 2014Inertial Technology Development Trends Development Seminar.[S.l.:s.n.],2014:57-60.)
[12]杨震,李振振,马学伟.海洋重力测量求取测网交叉点的新方法[J].内蒙古石油化工,2013(17):7-9.(YANG Zhen,LI Zhenzhen,MA Xuewei.New method for calculating survey of intersection in marine gravity survey[J].Inner Mongolia Petrochemical Industry,2013(17):7-9.)
[13]GRAV-D Science Team.Block EN01(Eastern North 01):GRAV-D airborne gravity data user manual[EB/OL].[2017-12-24].htttp:∥www.ngs.noaa.gov/GRAV-D/data_EN01.shtml.
[14]周波阳,罗志才,钟波,等.航空重力测量的数据归算方法[J].大地测量与地球动力学,2015,35(2):336-341.(ZHOU Boyang,LUO Zhicai,ZHONG Bo,et al.Data reduction methods of airborne gravimetry[J].Journal of Geodesy and Geodynamics,2015,35(2):336-341.)
[15]孙军峰.航空重力测量成果质量分析[D].郑州:信息工程大学,2012.(SUN Junfeng.Quality analysis of airborne gravity survey results[D].Zhengzhou:Information Engineering University,2012.)
[2]黄谟涛,翟国君,管铮,等.海洋重力场测定及其应用[M].北京:测绘出版社,2005.(HUANG Motao,ZHAI Guojun,GUAN Zheng,et al.Determination of ocean gravitational field and its application[M].Beijing:Surveying and Mapping Press,2005.)
[3]孙中苗,石磐,夏哲仁,等.航空重力仪的动态检测[J].测绘通报,2001(10):42-44.(SUN Zhongmiao,SHI Pan,XIA Zheren,et al.Dynamic test of airborne gravimeter[J].Bulletin of Surveying and Mapping,2001(10):42-44.)
[4]欧阳永忠.海空重力测量数据处理关键技术研究[J].测绘学报,2014,43(4):435.(OUYANG Yongzhong.On key technologies of data processing for air-sea gravity surveys[J].Acta Geodaetica et Cartographica Sinica,2014,43(4):435.)
[5]王丽红,张传定,王俊勤,等.航空重力测量数学模型及其测量精度分析[J].测绘科学技术学报,2008,25(1):68-71.(WANG Lihong,ZHANG Chuanding,WANG Junqin,et al.Mathematical model and accuracy evaluation for airborne gravimetry[J].Journal of Geomatics Science and Technology,2008,25(1):68-71.)
[6]孙中苗,翟振和,李迎春.航空重力测量的分辨率和精度分析[J].地球物理学进展,2010,25(3):795-798.(SUN Zhongmiao,ZHAI Zhenhe,LI Yingchun.Analysis on the resolution and accuracy of airborne gravity survey[J].Progress in Geophysics,2010,25(3):795-798.)
[7]李海.航空重力测量测线网平差的理论与方法[D].郑州:信息工程大学,2002.(LI Hai.Theory and methods of network adjustment of airborne gravimetry[D].Zhengzhou:Information Engineering University,2002.)
[8]孙中苗.航空重力测量理论、方法及应用研究[D].郑州:信息工程大学,2004.(SUN Zhongmiao.Theory,methods and applications of airborne gravimetry[D].Zhengzhou:Information Engineering University,2004.)
[9]蔡劭琨.航空重力测量网络平差方法研究[D].长沙:国防科学技术大学,2009.(CAI Shaokun.Research on the network adjustment of airborne gravimetry[D].Changsha:National University of Defense Technology,2009.)
[10]戢锐,康双双,李川,等.基于Matlab的航空重力交叉点搜索[J].工程地球物理学报,2011,8(5):551-555.(QI Rui,KANG Shuangshuang,LI Chuan,et al.Intersection search of airborne gravity based on Matlab[J].Chinese Journal of Engineering Geophysics,2011,8(5):551-555.)
[11]高巍.重力测线截取与交叉点搜索算法研究[C]∥2014年惯性技术发展动态发展方向研讨会文集.[出版地不详:出版者不详],2014:57-60.(GAO Wei.Gravity survey intercept and cross-point search algorithm[C]∥Proceeding of 2014Inertial Technology Development Trends Development Seminar.[S.l.:s.n.],2014:57-60.)
[12]杨震,李振振,马学伟.海洋重力测量求取测网交叉点的新方法[J].内蒙古石油化工,2013(17):7-9.(YANG Zhen,LI Zhenzhen,MA Xuewei.New method for calculating survey of intersection in marine gravity survey[J].Inner Mongolia Petrochemical Industry,2013(17):7-9.)
[13]GRAV-D Science Team.Block EN01(Eastern North 01):GRAV-D airborne gravity data user manual[EB/OL].[2017-12-24].htttp:∥www.ngs.noaa.gov/GRAV-D/data_EN01.shtml.
[14]周波阳,罗志才,钟波,等.航空重力测量的数据归算方法[J].大地测量与地球动力学,2015,35(2):336-341.(ZHOU Boyang,LUO Zhicai,ZHONG Bo,et al.Data reduction methods of airborne gravimetry[J].Journal of Geodesy and Geodynamics,2015,35(2):336-341.)
[15]孙军峰.航空重力测量成果质量分析[D].郑州:信息工程大学,2012.(SUN Junfeng.Quality analysis of airborne gravity survey results[D].Zhengzhou:Information Engineering University,2012.)