摘要
本文首先讨论了国家重力一等网与基本网实行联合平差的必要性。指出：联合平差对分析、提高基本网的精度、精确求定重力仪格值、充分发挥一等网观测值的精度潜力等十分有益。联合平差还应适当加入新的绝对重力测定值以加强国家级控制网的精度和可靠性。推导了联合平差的数学模型。最后预测并分析比较了不同平差方案所能获得的精度，提出了最佳方案。
:
The necessity of the combined adjustment of national basic and 1st-order gravity net-
works is discussed. It reveals that the combined adjustment is of great value to increa-
sing the accuracy of basic network, accuracy determining the scale value of gravimeter
and fully realizing the great potential of observations of 1 st-order network. In order to
increase the accuracy and reliability of gravity control networks of national level. the co-
mbined adjustment should be made by appropriately adding new gravity values from ab-
solute determination. The mathematical model of the combined adjustment is derived.
Finally, accuracies obtainable from different adjustment schemes are compared and optimal
scheme is suggested
出处
《测绘学报》
EI
CSCD
北大核心
1989年第3期227-231,共5页
Acta Geodaetica et Cartographica Sinica
