【摘要】 边角网平差前须将观测值归算到椭球面上,归算离不开高程异常。文中推导了用边长的平差改正数计算测区平均高程异常改正数的公式,提出了精化平均高程异常改正数的迭代方法。此方法最大的优点是不需要天文、重力、空间等外部数据的支持,简单易行。不仅可以满足高程异常未知情况下观测值归算的需要,也可满足高程异常不精确情况下观测值归算的需要,通过迭代还可以提高边角网平差结果的精度。更多还原

【Abstract】 A formula for average height anomaly correcting in measurement area calculated from residuals of the distances has been derived, and an iterative calculating method is proposed. This method is simple and practical in computation that does not need the support of astronomy, gravity or space measurements. It improves the accuracy of the positions by the adjustment of geodetic networks.更多还原