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中文摘要：
给出用加权约束平差计算绝对重力和相对重力混合网的方法,用抗差估计剔除粗差,χ^2检验验后单位权方差,t检验舍去无显著特征的重力仪参数,t检验验证外部检核点有无显著变化。计算结果表明,验后方差与先验方差之比为1.05,满足χ^2检验;未知重力点平均中误差±13.6×10^-8ms^-2;17个外部重力检核点无显著变化。
英文摘要：
A method to solve a synthetic adjustment of absolute and relative gravity network using weighted constrains is presented. Robust estimation is applied to eliminate gross errors,and χ^2 statistic is applied to a posteriori variance testing,and Student＇s t test is adopted to test statistically the relevance of gravimeter＇s parameters and to test whether the examination stations＇ gravities are evidently changed. Some computing results show that,the ratio between the posteriori variance after adjustment and the priori variance of unit weight is 1. 08,which satisfies a χ^2 test,and the average error estimate of the unknown gravity values is ± 13. 6 × 10^- 8ms^- 2,17 exterior examination stations＇ gravities aren＇t evidently changed.
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Derivation of the radial gradient of the gravity based on non-full tensor satellite gravity gradient
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