| GRACE时变重力位系数扇形滤波算法分析 |
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| 引用本文： | 郭飞霄,苗岳旺,肖云. GRACE时变重力位系数扇形滤波算法分析[J]. 测绘科学技术学报, 2015, 0(3): 231-235,240. DOI: 10.3969/j.issn.1673-6338.2015.03.003 |
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| 作者姓名： | 郭飞霄 苗岳旺 肖云 |
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| 作者单位： | 1. 西安测绘研究所，陕西 西安 710054; 地理信息工程国家重点实验室，陕西 西安 710054;2. 西安测绘信息技术总站,陕西 西安,710054 |
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| 基金项目： | 国家自然科学基金项目(41374083)；国家重点基础研究发展计划(973计划)项目(2013CB733303)；大地测量与地球动力学国家重点实验室开放基金项目( SKLGED2013-3-3-E)。 |
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| 摘 要： | 卫星重力探测技术为监测全球陆地水储量变化提供了新的技术手段。采用Level-2 Release-05版本GRACE时变重力场模型数据计算了2010年全球陆地水储量的月变化;着重研究了扇形滤波对反演结果的影响;并结合GLDAS水文模型数据对反演结果进行了验证分析。实验结果表明:GRACE反演结果 GLDAS水文模型结果在时空分布上符合较好;扇形滤波能够削弱GRACE时变重力场模型的高阶项误差影响,有效去除反演结果中的条带状噪声。
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| 关 键 词： | GRACE卫星 卫星重力 扇形滤波 时变重力场 陆地水储量变化 GLDAS模型 |
Fan Filtering Algorithm Analysis of GRACE Time-Variable Geopotential Coeffcients |
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| GUO Feixiao , MIAO Yuewang , XIAO Yun. Fan Filtering Algorithm Analysis of GRACE Time-Variable Geopotential Coeffcients[J]. Journal of Zhengzhou Institute of Surveying and Mapping, 2015, 0(3): 231-235,240. DOI: 10.3969/j.issn.1673-6338.2015.03.003 |
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| Authors: | GUO Feixiao MIAO Yuewang XIAO Yun |
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| Abstract: | The satellite gravimetry detection technology provides a new technical means for monitoring global conti-nental water storage variation. The global continental water storage variation in 2010 was calculated using GRACE Level-2 Release-05 data published by GFZ. The inversion result was verified well by GLDAS hydrological model. The influence of filtering on global continental water storage variation results was studied. Because fan filtering can weaken high degree noises in GRACE time-variable gravity model, striping N-S noises was removed effectively by fan filtering in experiment. The experiment results also show that the global continental water storage variation cal-culated by GRACE time-variable gravity and GLDAS hydrological model coincides well in spatial and temporal dis-tribution. |
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| Keywords: | GRACE satellite satellite gravimetry fan filtering time-variable gravity water storage variation GLDAS model |
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