摘要
给出了计算局部地形改正和间接效应的改进公式及其谱计算式 ;确定了地形改正和间接效应级数展开计算式的可选次项和最佳积分半径 ;论证了计算地形改正需要进一步提高地形高数据分辨率和计算间接效应可以降低对地形高数据分辨率和精度要求的依据 ;讨论了精细积分面积元对计算地形改正的作用。
Two more rigorous integral series and the corresponding spectral evaluations in frequency domain for computing terrain corrections and indirect effect on geoid,first,are presented in this paper. Then, the choices of terms and integration radii of the integral series are discussed in detail. And a number of numerical examples are used to declare the requirements of elevation in resolution and accuracy for computing terrain corrections and indirect effect. Finally,a special emphasis is placed on the effect of fining grid element for computing terrain corrections.
出处
《测绘学院学报》
2000年第4期242-246,共5页
Journal of Institute of Surveying and Mapping
关键词
谱技术
FFT
地形改正
间接效应
spectral technique
FFT
terrain corrections
indirect effect
