【摘要】 针对模型尺度参数ae对高程异常计算的影响进行数值分析;利用各模型位系数方差信息及区域高精度GPS/水准数据分析国际上新近公布的ITG-GRACE2010S、AIUB-GRACE03S、EIGEN-6C、GOCO02S、DIR_R3、TIM_R3、SPW_R2、gif48以及EGM2008多类重力场模型对应不同谱域的位系数精度;提出采用简单谱组合方法和加权谱组合方法来提高高程异常的计算精度。在试验区域,计算结果表明,各模型的中低阶(约135阶)位系数整体精度要优于EGM2008模型,gif48和EIGEN-6C模型的整体精度均优于同阶次的EGM2008模型,简单谱组合方法和加权谱组合方法均能提高区域模型高程异常精度。更多还原

【Abstract】 The scale factor aeof Earth gravity field model is discussed for numerically analyzing the effect on model height anomaly,and the coefficient’s accuracy of the latest models ITG-GRACE2010S,AIUB-GRACE03S,EIGEN-6C,GOCO02S,DIR_R3,TIM_R3,SPW_R2,gif48 and EGM2008 for different degrees are analyzed based on coefficient’s variance information and GPS/leveling data sets.The simply spectral combination method and weighted spectral combination method are given for improving the accuracy of model height anomaly.In test area,the results show that the accuracy of all models up to degree and order 135 is better than the same degree and order of EGM2008 model,and the accuracy of gif48 and EIGEN-6C model is also better than the same degree and order of EGM2008 model,the simply spectral combination method and weighted spectral combination method can also improve the accuracy of regional model height anomaly.更多还原