摘要
通过对厄特弗斯改正和水平加速度改正的对比分析,讨论了航空重力测量中水平加速度的预滤波处理;在理论上分析了模型计算过程中各分量的频谱变化,提出了基于减震系统确定预滤波尺度的方法。所得到的结果与根据平台倾角频谱特性确定的尺度是相当的。实测数据计算表明,精确确定航空重力数据预滤波的尺度能够进一步提高数据处理的精度。
The pre-filter processing of the horizontal acceleration in the aerial gravity measurement was discussed by the comparison analysis between Etvs correction and horizontal acceleration correction.The spectra changing of each constituent in the process of model computation was theoretically analyzed,the conception which was used to ascertain the scale of pre-filter based on the shock absorbs was proposed and validated by deduction,the scale was comparative to that gained from the spectral characteristics of the platform obliquity.Calculations showed that the reasonable scale improved the precision of aerial gravity data processing.
出处
《测绘科学技术学报》
北大核心
2010年第4期255-258,共4页
Journal of Geomatics Science and Technology
基金
国家自然科学基金资助项目(40774031)
卫星导航与定位教育部重点实验室(B类)开放基金(GRC-2009010)
关键词
航空重力测量
谱分析
傅里叶变换
预滤波
稳定平台
aerial gravity measurement
spectra analyse
Fourier transform
pre-filter
shock absorbers
作者简介
田颜锋（1981--），男，河南临颍入，助理工程师，硕士，主要从事物理大地测量研究。
