地球扰动位的球谐展开式表示是地球重力场模型应用最广泛的一种表示方法。目前通用的位系数模型的分辨率是0.5°，最高完全阶次为360。由于全球重力数据覆盖的密度和数据精度差别较大，所以已知的重力场模型的实际分辨率及其精度也因地区而异，故重力场模型的精化是一个漫长的过程，局部积分谱权综合法是改善已知重力场模型的有效而简便的方法。基于重力场模型OSU91A及EGM96，利用我国15′×15′及5′×5′重力异常，我们解算了更高阶次的地球重力场模型DQM99A、B、C、D四个模型，给出了精度比较分析结果。

The harmonic series formula of the Earth´s disturbing potential is the most extensive applicable expression for the Earth´s gravity field model. At present, the resolution of the used geopotential coefficient model is 0.5°, and the complete degree and order is 360. Since the gravity data density and precision are very different everywhere, the model accuracy isn´t uniform. The improvement of model is necessary.. The method of the regional correction with frequency weight for improving a known model is a convenient and applicable method. Based on the OSU91A and EGM96 models and regional 15´×15´ △g and 5´×5´ △g, the improved models DQM99A and DQM99B to degree 720, DQM99C and DQM99D to degree 2 160 are developed. Their accuracy comparison is presented in this paper.