| 不同Mascon模型解比较分析 |
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| 引用本文： | 郭飞霄,孙中苗,任飞龙,肖云.不同Mascon模型解比较分析[J].大地测量与地球动力学,2019,39(10):1022-1026. |
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| 作者姓名： | 郭飞霄 孙中苗 任飞龙 肖云 |
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| 作者单位： | 信息工程大学地理空间信息学院,郑州市科学大道62号,450001;地理信息工程国家重点实验室,西安市雁塔路中段1号,710054;西安测绘研究所,西安市雁塔路中段1号,710054;地理信息工程国家重点实验室,西安市雁塔路中段1号,710054;西安测绘研究所,西安市雁塔路中段1号,710054;西安航天天绘数据技术有限公司,西安市航天大道59号,710054 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）;国家自然科学基金;大地测量与地球动力学国家重点实验室开放基金 |
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| 摘 要： | 简要介绍不同机构发布的Mascon模型解数据，并在全球和区域尺度上对Mascon模型解、球谐系数法以及GLDAS水文模型陆地水储量变化计算结果进行对比分析。结果表明，不同Mascon模型解具有较好的一致性；与球谐系数法反演结果相比，Mascon模型解能提高反演结果信噪比值，空间分辨率更高，保留更多有效信号，与GLDAS水文模型结果相关性更好；不同Mascon模型解中，JPL Mascon模型解信噪比值最大，与GLDAS水文模型时间序列相关性最好。
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| 关 键 词： | GRACE卫星 时变重力场 Mascon方法 质量变化 信噪比 |
Comparison and Analysis of Different Mascon Model Results |
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| GUO Feixiao,SUN Zhongmiao,REN Feilong,XIAO Yun.Comparison and Analysis of Different Mascon Model Results[J].Journal of Geodesy and Geodynamics,2019,39(10):1022-1026. |
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| Authors: | GUO Feixiao SUN Zhongmiao REN Feilong XIAO Yun |
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| Abstract: | The Mascon data published by different research institutions are introduced briefly in this paper. Pesults of terrestial water storage variation which calculated y Mascon data, GLDAS model data and spherical harmonic coefficients method are compared in global and regional scales. The results show that Mascon data of different institutions have consistency. Signal-to-noise ratio and spatial resolution of terrestrial water storage variation results are improved by the Mascon method compared with the spherical harmonic coefficients method. More true signals of regional mass variation are kept. Time series of regional terrestrial water storage variation results which calculated by Mascon data are more relevant to GLDAS model results compared with the results of the spherical harmonic coefficients method. The signal-to-noise ratio of global surface mass variation inversion results by Mascon data are larger than results of spherical harmonic coefficients method. The JPL Mascon results are maximal. |
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| Keywords: | GRACE satellites time-variable gravity field Mascon method mass variation signal-to-noise ratio |
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