| 磁偏角基准维持系统的建立 |
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| 引用本文： | 陈建光,宋雪丽,等.磁偏角基准维持系统的建立[J].测绘学院学报,2003,20(1):22-25. |
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| 作者姓名： | 陈建光 宋雪丽 |
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| 作者单位： | 信息工程大学测绘学院 河南郑州450052
(陈建光，宋雪丽，吴洪举)，信息工程大学测绘学院 河南郑州450052(刘波) |
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| 摘 要： | 在磁方位标准台上通过磁力仪连续记录及计算获取磁方位基准台的磁偏角周日变化数据；在Matlab软件中用小波对磁偏角信号进行滤波，并用调和函数进行拟合，在考虑地球磁场年变化及季节变化的基础上建立了一个可用于测斜仪器检测的磁偏角基准体系。
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| 关 键 词： | 小波分析 磁偏角 磁方位角 测斜仪 地磁经纬仪 |
The Establishing of Magnetic Deviation Standard Test System |
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| CHEN Jian guang,SONG Xue li,WU Hong ju,LIU Bo.The Establishing of Magnetic Deviation Standard Test System[J].Journal of Institute of Surveying and Mapping,2003,20(1):22-25. |
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| Authors: | CHEN Jian guang SONG Xue li WU Hong ju LIU Bo |
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| Abstract: | Accuracy assess of magnetic azimuth (MA) observation of declinometer requires the magnetic deviation (MD) be provided as a known value. For this purpose, a MD standard test system has been developed to offer MD of the test platform with sufficient accuracy. Geomagnetic theodolite laid on the indoor test platform is able to consecutively sample MA of the platform to its observation mark and then the recorded data are used to derive MD time series. After a Matlab based wavelet filter is adopted to remove noises and a 36 order harmonic function is employed to fit diurnal variation in MD time history, meanwhile taking annual and seasonal changes in geomagnetic field into account, we set up a MD test system that can be used for declinometer testing. |
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| Keywords: | wavelet analysis magnetic deviation magnetic azimuth declinometer geomagnetic theodolite |
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