| 利用GRACE卫星Level-1B数据反演陆地水储量变化的方法研究 |
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| 引用本文： | 郭飞霄,肖云,汪菲菲,苗岳旺.利用GRACE卫星Level-1B数据反演陆地水储量变化的方法研究[J].测绘工程,2015(6):18-22. |
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| 作者姓名： | 郭飞霄 肖云 汪菲菲 苗岳旺 |
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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： | 国家自然科学基金资助项目(41374083)；国家重点基础研究发展计划(2013CB733303-2)；大地测量与地球动力学国家重点实验室开放基金资助项目 |
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| 摘 要： | 卫星重力探测技术为监测陆地水储量变化提供了新的技术手段。对利用GRACE卫星Level-1B数据反演地球陆地水储量变化的重力位差法和Mascon方法的数学模型作了详细推导分析,总结两种方法的特点和解算处理步骤。推导过程表明:重力位差法和Mascon方法在反演时只采用卫星飞临研究区域上空时的观测数据,能够提高反演结果的空间分辨率,比传统的球谐系数法更具优势;Mascon方法在解算时还引入了时空约束方程,进一步提高了反演结果的时空分辨率。
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| 关 键 词： | 卫星重力探测 陆地水储量 GRACE卫星 Mascon方法 重力位差 |
A study of the methods of recovering continental water storage variation using GRACE Level-1B data |
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| GUO Fei-xiao,XIAO Yun,WANG Fei-fei,MIAO Yue-wang.A study of the methods of recovering continental water storage variation using GRACE Level-1B data[J].Engineering of Surveying and Mapping,2015(6):18-22. |
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| Authors: | GUO Fei-xiao XIAO Yun WANG Fei-fei MIAO Yue-wang |
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| Abstract: | Technology of satellite gravimetry provides a new technical means for monitoring continental water storage variation .Mathematical models of Mascon and situ geopotential using GRACE Level-1B data for recovering continental water storage variation are deduced detailedly .The characteristic and processing steps of the two methods are summarized .It is showed that methods of Mascon and situ geopotential can promote the spatial resolution of result and have more advantages than the method of spheric harmonic coefficient because of using range rate observations only w hen satellites flying over study area .Constraint equation is introduced into Mascon method processing ,and further promotes the spatial and temporal resolution . |
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| Keywords: | satellite gravimetry continental water storage GRACE satellite mascon method situ geopoten-tial |
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