分米级低轨卫星精密定轨  

Precise Orbit Determination of LEOS on Decimeters Level

作　　者：吴显兵[1,2,3] 阮仁桂[1,2] 秦显平[1,2] 

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054 [3]长安大学,陕西西安710054

出　　处：《测绘科学与工程》2015年第2期1-4,共4页Geomatics Science and Engineering

摘　　要：本文提出一种分米级低轨卫星精密定轨方案：首先，利用载波相位平滑伪距进行几何法定轨，其中平滑伪距通过非发散的哈齐滤波器获得；然后，将几何法轨道作为虚拟观测量进行动力学平滑。为了验证该方案的可行性，作者采用GRACE卫星星载GPS数据进行定轨实验。结果表明，与JPL精密轨道相比，本文获得的轨道每个分量的精度优于2dm。This paper proposes an approach to precise orbit determination of low earth orbit satellite （LEOS） on decimeters level. First the authors generate dynamic orbit determination using carrier - phase smoothing pseudorange observation, which is available through the divergence - free Hatch filter. Then they use kinematic orbit as the virtual observations for dynamical smoothing. In order to validate the approach, the authors carry out the experiment with satellite - based GPS data for GRACE. The results demonstrate that compared with precise orbit from JPL, the accuracy of precise orbit determination of LEOS on decimeters level is better than 2 decimeters for each component.

关 键 词：GPS 载波相位 非发散的哈齐滤波器 几何法定轨 动力学平滑 

分 类 号：P223[天文地球—大地测量学与测量工程]