摘要
本文给出了重力异常的变密度层间改正、变密度地形改正计算公式。首次采用文中提出的移动拟合法，分别按变密度和常密度应用快速Ｆｏｕｒｉｅｒ变换（ＦＦＴ）进行了平均空间异常的计算。证明应用变密度时提高了计算精度，在大山区对５′×５′值的影响一般在１０ｍｇａｌ左右。（１ｇａｌ＝１ｃｍ／ｓ２）。按本文提出的方案，完成５′×５′地壳密度参数的计算时，精度可达：０．
This paper has given the computed formulae of Bouguer plate correction and terrain correction with varying density. First adopting move fitting method from the paper putting forward has finished the computation of mean free air gravity anomalies using Fast Fourier Tranform according to varying density and constant density. A proof has improved the computed precision in use varying density, in the large mountainous region, the influence of 5′×5′ value in general is a 10 mgal or so. According to the scheme in the paper in finishing 5′×5′ parameter of density of the earth′s crust, the precision may reach 0 05 g/cm 3.
出处
《测绘学报》
EI
CSCD
北大核心
1996年第4期292-297,共6页
Acta Geodaetica et Cartographica Sinica
