摘要
讨论不同点数的牛顿中心差分器对航空重力测量中确定载体加速度的影响。理论分析表明,当航空重力测量的有效频段位于牛顿中心差分器的通带时,不同点数的牛顿中心差分器所得结果经低通滤波后几乎没有差异。实验表明,当采样间隔为1s、载体平均速度为155m/s、所需重力数据的分辨率为10km时,低通滤波后不同点数的牛顿中心差分器输出结果之间的较差优于2.1mGal。
The influence of Newton central differentiators upon acceleration in airborne gravimetry is dis- cussed. It is concluded theoretically that there are almost no differences between the results of Newton central differentiators after low-pass filtering, when the effective band of airborne gravimetry is located in the pass bands of Newton central differentiators. The experimental results show that when the sampling interval is 1 s, the average velocity is 155 m/s, the resolution of gravity data is 10 km, and the standard deviations of the differences between the results of Newton central differentiators are less than 2. 1 mGal.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第6期923-926,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41174062
41104014
41474019)
地球空间环境与大地测量教育部重点实验室开放基金(14-01-03)
关键词
航空重力测量
牛顿中心差分器
加速度
低通滤波
airborne gravimetry
Newton central differentiator
acceleration
low-pass filtering
