DGPS加速度测量及试验验证  

Measurement and verifying experiment of DGPS-derived acceleration

作　　者：陈铭 武若楠 胡佩达[1] 吴秋平[1] 

机构地区：[1]清华大学精密仪器系,北京100084

出　　处：《导航定位学报》2018年第1期85-90,共6页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(61603208)

摘　　要：针对DGPS加速度测量精度评估缺乏真值的问题,提出利用单轴转台高精度匀速转动提供恒定向心加速度来作为测得的加速度矢量的模的参考值,进而评估动态测量精度的方法。结果表明:标准差随着滤波周期的增大而降低;当滤波周期大于60s时,加速度的模的标准差小于1mGal,可以满足高精度航空重力测量的要求。Aiming at the problem that it is lack of a direct and efficient assessment for the accuracy of DGPS acceleration measurement,the paper proposed to offer a constant centripetal acceleration by using the precisely uniform rotation of a singleaxis turntable,so as to provide a reference to the module of the measured acceleration vector and then assess the accuracy of the kinematic measurement.Result showed that the longer the filtering period was,the smaller the standard deviation of the acceleration would be;and when the filtering period was longer than 60 s,the standard deviation of the module of the acceleration would be smaller than 1 mGal,which could meet the requirement of high-precise airborne gravimetry.

关 键 词：航空重力测量 加速度 DGPS载波相位 动态实验 转台 

分 类 号：P228[天文地球—大地测量学与测量工程]