绝对重力与相对重力混合平差的基准及质量控制

Datum and Quality Control for Synthetic Adjustment of Absolute and Relative Gravity Networks

绝对重力与相对重力测量混合平是综合利用各种重力测量资料确定重力网基准，提高重力网综合质量的有效途径。文中首先从重力观测的系统误差入手，讨论重力网平差的函数模型，进而根据两类重力观测信息对重力基准的贡献，分析了不同平差方法所对应的各类基准及其统计意义与可靠性；最后对重力网平差的质量控制方法进行了讨论。

It is an effective way to improve the total quallty and determine the datum of a gravity net- work by a synthetic adjustment of absolute and relative gravity networks. Beginning with discussing of the systematic errors of gravity observations, we introduce some functinal adjustment models. Then the datum and their statistical backgrounds as well as the reliabilities corresponding to the adjustment meth- ods are analyzed based on the contribution of the two kinds of gravity observations. At last, some quality control methods are discussed for the adjustment of gravity networks.