| 导航用重力梯度基准图构建方法的比较研究 |
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| 引用本文： | 钱东,刘繁明,李艳,张迎发.导航用重力梯度基准图构建方法的比较研究[J].测绘学报,2011,40(6):736-744. |
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| 作者姓名： | 钱东 刘繁明 李艳 张迎发 |
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| 作者单位： | 哈尔滨工程大学自动化学院 |
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| 基金项目： | 国家自然科学基金(60834005) |
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| 摘 要： | 基准图是重力梯度辅助导航实用化研究的关键技术，由于依靠实测构造大范围基准图还需要较长时间，理论模型逼近重力梯度开始成为可行的构图方法。系统研究了一种基于自由空间异常或布格异常数据的构图方法，避免了相关研究构建梯度图时较少考虑标准测量数据，构图结果物理意义不明确和缺乏实用性的缺点。以重力归算理论推导了构图方法原理，然后用频域算法实现构图过程中两个关键计算过程，通过算例分析了构图效果。所构基准图数值、轮廓等关键特征均与实测重力梯度吻合较好，证明了该方法在重力梯度辅助导航基准图构建中的实用价值。
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| 关 键 词： | 重力 重力梯度 导航 基准图 匹配 |
| 收稿时间： | 2010-07-22 |
| 修稿时间： | 2010-10-14 |
Comparison of Gravity Gradient Reference Map Composition for Navigation |
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| QIAN Dong,LIU Fanming,LI Yan,ZHANG Yingfa.Comparison of Gravity Gradient Reference Map Composition for Navigation[J].Acta Geodaetica et Cartographica Sinica,2011,40(6):736-744. |
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| Authors: | QIAN Dong LIU Fanming LI Yan ZHANG Yingfa |
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| Institution: | College of Automation,Harbin Engineering University,Harbin 150001,China |
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| Abstract: | In order to overcome some drawbacks,such as little consideration of existing gravity database and physical meaning of the modeled results in reference map composition researches,a mapping method which starts from Free-air anomaly and Bouguer anomaly data is proposed.Based on gravity reduction theory,principle of the method is derived first.and then key algorithms in the computation is introduced.Effectiveness of the approach is analyzed detail by detail through two application examples,the results demonstrate that most value and charac-teristics of the acquired reference map compare favorably with measured gravity gradient data when high resolution gravity anomaly appears,which embodies practical value of the method.In addition,correlative software work can be referenced for the study of GGANS. |
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| Keywords: | gravity gravity gradient navigation reference map matching |
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