摘要
针对捷联式航空重力仪测量系统,给出了GPS/捷联惯性组合导航扩展卡尔曼滤波方程、二阶马尔可夫过程的重力异常模型以及由重力异常作为状态变量的卡尔曼滤波状态方程。应用平滑综合的正、反卡尔曼滤波法对捷联式航空重力仪实测数据进行了处理,获得自由空间重力异常值,并与同机飞行的GT-2A航空重力仪测量结果进行比对。对比结果表明,两者的自由空间重力异常值之差小于0.85mGal。
For the strapdown airborne gravimeter measurement system, the extended Kalman filtering equation of the GPS/Strapdown inertial integrated navigation, the gravity anomaly model of second-order Markov process and the Kalman filtering state equation of state which takes the gravity anomaly as variable are given. The measured data of Strapdown airborne gravimeter are processed by using the smoothed forward and backward Kalman filtering method, and the free-air gravity anomaly values are obtained. The results are compared with those of the GT-2A airborne gravimeter equipped on the same plane. The comparison results show that the difference between the free-air gravity anomaly values is less than 0.85 mGal.
作者
蔡体菁
颜颖
王新宇
CAI Tijing;YANG Ying;WANG Xinyu(School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China;The 26th Institute of China Electronics Technology Group Corporation, Chongqing 400060, China)
出处
《压电与声光》
CAS
北大核心
2019年第3期436-439,共4页
Piezoelectrics & Acoustooptics
基金
国家国际科技合作专项基金资助项目(2014DFR80750)
国家重点研发计划基金资助项目(2016YFC0303006,2017YFC0601601)
总装预研基金资助项目(41417060202,31506020401)
关键词
重力仪
卡尔曼滤波
重力异常
gravimeter
Kalman filtering
gravity anomaly
