| 航空重力测量的数据归算方法 |
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| 引用本文： | 周波阳,罗志才,钟波,姚朝龙.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. |
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| 作者姓名： | 周波阳 罗志才 钟波 姚朝龙 |
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| 作者单位： | 1〓广东工业大学测绘工程系, 广州市大学城外环西路100号，510006
2〓武汉大学测绘学院, 武汉市珞喻路129号，430079
3〓武汉大学地球空间环境与大地测量教育部重点实验室，武汉市珞喻路129号，430079 |
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| 摘 要： | 采用径向改正方法将航线高度处的重力观测值归算到平均飞行高度面，采用交叉点两步平差法来进行测线系统误差补偿，并选用加权平均法和Shepard曲面拟合法对重力观测值作格网化处理。对美国大地测量局（NGS）发布的EN01进行数据处理，〖JP〗给出大地高6 200 m处2°×3°范围内5′×5′规则格网重力扰动数据。相对于该区域的EGM2008格网重力扰动参考值，加权平均法和Shepard曲面拟合法精度分别为±1.59 mGal和±1.36 mGal。
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| 关 键 词： | 航空重力测量 数据归算 交叉点平差 格网化 |
| 收稿时间： | 2014-03-10 |
Data Reduction Methods of Airborne Gravimetry |
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| ZHOU Boyang,LUO Zhicai,ZHONG Bo,YAO Chaolong.Data Reduction Methods of Airborne Gravimetry[J].Journal of Geodesy and Geodynamics,2015,35(2):336-341. |
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| Authors: | ZHOU Boyang LUO Zhicai ZHONG Bo YAO Chaolong |
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| Institution: | 1〓Department of Surveying and Mapping, Guangdong University of Technology,100 West-Waihuan Road, Guangzhou 510006, China;
2〓School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China;
3〓Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, ;129.Luoyu Road, Wuhan 430079, China |
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| Abstract: | This article examines data reduction methods for airborne gravimetry, including reducing raw gravity observations along survey lines to average height level, compensating system errors by two-step crossover adjustment and gridding gravity data using weighted average (WA), and Shepard surface fitting (SSF) methods. Data block EN01, released by NGS (National Geodetic Survey), is processed according to the scheme, outputting 5′×5′ grid gravity disturbances covering a region of 2°×3°, with geodetic height 6 200 m. Compared to reference values computed by EGM2008 at the same locations, the accuracies of the output data from WA and SSF are ±1.59 mGal and ±1.36 mGal. |
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| Keywords: | airborne gravimetry data reduction cross-point adjustment gridding |
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