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Determination of Fuxin quasi-geoid without gravity data

LI Ji-zhi,SUN Yan-chong(Surveying Department,Liaoning Technical University,Fuxin 123000,China)  
The quasi-geoid computed by geopotential model is fitted with the quasi-geoid measured by GPS leveling.The methods are as follows: for each GPS leveling point,the height anomaly is computed using a geopotential model and compared with the measured value by GPS leveling,the correction to the computed value is obtained.The correction is used to correct the height anomaly of near by 2.5′×2.5′grids,which is calculated by the geopotential model.
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