| ���ھ���ģʽ�ֽ��CORSվ�߳�ʱ�����з��� |
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| 引用本文： | 张恒璟,程鹏飞.���ھ���ģʽ�ֽ��CORSվ�߳�ʱ�����з���[J].大地测量与地球动力学,2012,32(3):129-134. |
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| 作者姓名： | 张恒璟 程鹏飞 |
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| 作者单位： | 1. 辽宁工程技术大学测绘与地理科学学院,阜新 123000;中国测绘科学研究院,北京 100830
2. 中国测绘科学研究院,北京,100830 |
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| 基金项目： | 国家基础测绘项目，中国测绘科学研究院基本科研业务费资助 |
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| 摘 要： | ???????????????????GPS??????????????????????????????CORS???????????????????????????????????????????????????????????????о??????????????????????????????????????????????????????????????????????????????????????????????????????壻??????????????????????????????????????????????????????????????????????????????????????
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| 关 键 词： | ????????? ?????????? ?????? GPS?????????? ???????? |
ANALYSIS ON TIME SERIES OF TWO CORS STATIONS'HEIGHT BASED ON EMD |
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| Zhang Hengjing
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Cheng Pengfei.ANALYSIS ON TIME SERIES OF TWO CORS STATIONS'HEIGHT BASED ON EMD[J].Journal of Geodesy and Geodynamics,2012,32(3):129-134. |
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| Authors: | Zhang Hengjing Cheng Pengfei |
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| Institution: | 1)School of Geomatics of Liaoning Technical University,Fuxin 1230002)Chinese Academy of Surveying & Mapping,Beijing 100830 |
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| Abstract: | The time-frequency analysis method base on EMD(empirical mode decomposition) for GPS height time series is put forward.Taking two national CORS stations’ GPS height time series as an example,each intrinsic mode function is decomposed and the contribution rate of variance is also calculated.The problem of identifying father distinguishing the periodical signals and the trend is emphasizerd.The results indicate that it is only meaningful to distinguish the periodical and the trend signal on certain length of time series’ section.The trend based on EMD or EEMD presents with large curvature while the traditional form of periodical fitting function only linear form. |
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| Keywords: | empirical mode decomposition(EMD) intrinsic mode function trend GPS height time series contribution rate of variance |
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