高分辨率区域重力场模型DQM2000

A New Series of High Resolution Earth's Gravity Field Models DQM2000

基于局部积分谱权综合法 ,选择国外重力场模型OSU91A和EGM96作为基础模型 ,利用中国地域2 0′× 2 0′、1 5′× 1 5′、1 0′× 1 0′和 5′× 5′平均重力异常 ,解算了一组高分辨率地球重力场系列模型DQM2 0 0 0 ,即DQM2 0 0 0A、DQM2 0 0 0B、DQM2 0 0 0C和DQM2 0 0 0D ,其完整阶次分别为 5 40、72 0、1 0 80和 2 1 60 ,采用内部符合和外部检核的方法以评价新模型的精度。

This paper presentes a new series of high_resolution earth s gravity field models DQM2000 computed by the method of regional integral correction with frequency weight and their accuracy comparison.Based on the OSU91A and EGM96 models and the regional mean gravity anomalies of 20′×20′,15′×15′,10′×10′ and 5′×5′ in China,the improved models DQM2000A,DQM2000B,DQM2000C and DQM2000D,whose complete degrees and orders are up to 540,720,1 080 and 2 160 respectively,are developed.