Kinematic GPS positioning of LEO satellites using ionosphere-free single frequency measurements
Kinematic GPS positioning of LEO satellites using ionosphere-free single frequency measurements
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DOI：
10.1016/s1270-9638(03)00034-8
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发表时间：
2003-07-01
影响因子：
5.6
通讯作者：
Montenbruck, O
中科院分区：
文献类型：
--
作者：
Montenbruck, O
讨论了一种基于GPS单频测量的近地轨道卫星运动点定位方法。它利用C/ a编码和L1相位观测的无电离层组合（GRAPHIC），因此可以与大多数非大地测量星载GPS接收机一起使用。除了动态卡尔曼滤波方案估计位置、速度和时钟参数以及所有跟踪信道的一组偏差外，本研究还研究了一种纯运动学方法。它包括位置的全局调整、时钟偏移和观测的旁路偏置。因此，它不需要对用户飞行器的运动进行任何假设，可以应用于自由飞行和机动航天器。示例结果显示了在信号模拟器测试台上使用低成本单频接收器收集的LEO GPS数据以及CHAMP任务的飞行数据。在这两种情况下，与简洁的参考轨迹相比，可以证明纯运动学3D位置精度为1-1.5 m。(C) 2003年版scientitiques et medicales Elsevier SAS。版权所有。
A method for kinematic point positioning of satellites in low Earth orbit (LEO) based on single frequency GPS measurements is discussed. It makes use of a ionosphere-free combination (GRAPHIC) of C/A code and L1 phase observations and can thus be employed with the majority of non-geodetic spaceborne GPS receivers. Other than dynamical Kalman filter schemes estimating position, velocity and clock parameters along with a set of biases for all tracked channels, a purely kinematic approach is examined in this study. It comprises a global adjustment of positions, clock offsets and pass-by-pass biases from the observations. As such, it is free of any assumptions on the motion of the user vehicle and can be applied for free-flying as well as maneuvering spacecraft. Sample results are shown for LEO GPS data collected with a low-cost single frequency receiver in a signal simulator test bed as well as flight data from the CHAMP mission. In both cases, a purely kinematic 3D position accuracy of 1-1.5 m could be demonstrated in comparison with concise reference trajectories. (C) 2003 Editions scientitiques et medicales Elsevier SAS. All rights reserved.