滤波器的截止频率对航空重力测量精度的影响

简要介绍了航空重力测量中滤波器截止频率频率和测量成果精度的关系,结合2012年某地区的实际测量数据分析了滤波器不同的截止频率对航空重力测量的精度的影响。实际数据验证表明,在飞机速度平均为200km/h时,滤波器截止频率为0.007的内符合精度可以达到±6.9978mGal,其精度符合规范要求,表明在航空重力测量的计算中,根据飞机的实际速度确定合适的滤波器截止频率进行滤波,可以有效提高测量的精度。

The Influence Cause by the Filter Cutoff Frequency to the Accuracy of the Airborne Gravity Survey

This paper gives a brief instruction of the connection between the filter cutoff frequency and the accuracy of airborne gravity survey. Combine with the actual data which is obtained in 2012 at somewhere, analyze the influence of the different filter cutoff frequencies to the accuracy of the airborne gravity survey. The result shows that when average speed of the airplane is 200km/h and the filter cutoff frequency is 0. 007, the inner accuracy can be ±6. 9978 regal, this is up to standard. Therefore, adjust the cut off frequency by the plane speed can enhance the measuring accuracy.