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中文摘要：
用中国青藏高原某地区实测重力数据和SRTM3地形数据计算了该地区大地水准面与似大地水准面的差距。理论分析和数值计算表明，二者的差距与高程有很大的相关性，高程一次项在该地区的均值达到1.76 m，高程二次项的最大值达到0.03 m。
英文摘要：
The separation between geoid and quasigeoid by using observed gravity data and SRTM3 terrain data in some areas of QinghaiTibet plateau was determined. Theory analyses and numerical tests showed that there existed a high correlation between the separation and elevation, and the average correction about first order height terms could be up to 1.76 m, and the maximum correction about second order height terms could be up to 0.03 m.
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