摘要
本文介绍了GPS在航空重力测量中的作用，并用实际算例分析了机载GPS天线位置对航空重力测量精度的具体影响。实际数据验证表明，静态测量时，机载前天线和后天线的速度、加速度差值分别为0．1mm／s和0．2mGal；测线动态测量时，机载前天线和后天线的速度、加速度差值小于2．0mm／s和2．0mGal；机载GPS前后天线的交叉点重力异常标准差分别为2．844mGal、3．032mGal，差值小于0．2mGal。所以，航空重力测量计算使用前天线和后天线的数据均可。
In this paper, the function of GPS in the airborne gravimetry is introduced briefly, and the influence of airborne GPS antenna position on the airborne gravimetry accuracy is analyzed with actual observed data. The result shows that the velocity and acceleration discrepancies of the front and rear GPS antenna are 0. lmm and 0.2mGal in static state, and 2.0mm/s and 2.0reGal in dynamic state. The standard deviations of gravity anomaly at crossing points calculated with the two antennae is 2. 844reGal and 3. 032mGal, and the discrepancy is less than 0.2mGal. Therefore, both the front and rear antenna data can be used in the calculation of airborne gravimetry.
出处
《测绘科学与工程》
2015年第6期26-28,35,共4页
Geomatics Science and Engineering
