弹载GNSS虚拟参考站差分定位技术研究
Research on differential positioning technology of missile borne GNSS virtual reference station
吴庆丰 1宋叶志 2闫正洲 3夏凤雨 2李静 3罗鹏 4周善石 2胡小工 2赵炽4
作者信息
- 1. 西华师范大学,四川南充 637002;中国科学院上海天文台,上海 200030
- 2. 中国科学院上海天文台,上海 200030
- 3. 西华师范大学,四川南充 637002
- 4. 中国科学院上海天文台,上海 200030;中国科学院大学,北京 100049
- 折叠
摘要
针对高动态目标定位的长基线实时解算需要,本研究采网络多基站融合技术,结合基准站与线性内插模型算法,生成虚拟参考站伪距观测值,并将虚拟参考站作为基准站与目标进行伪距差分解算,从而解算高动态目标的位置轨迹.通过静态目标与高动态目标的实测数据验证,在有 3 个基准站的情况下,静态数据的定位精度达到0.399 m;而高动态目标在目标与基准站共视卫星个数不少于6 颗的情况下,定位中误差不超过2.750 m;而与光学雷达、多测速雷达等其他外测设备的实测综合轨迹相比,两者之间位置差异的均方根值为6.390 m,基本满足高动态目标的定位需要.
Abstract
For high-dynamic target positioning in long-baseline real-time solutions,this study utilizes network-based multi-station fusion technology,along with a combination of reference station and linear interpolation model algorithms.This generates pseudo-range observations for virtual reference stations,which are used as reference stations in pseudo-range differencing with the target.This approach is employed to compute the position trajectory of high-dynamic targets.Validation using measured data from static and high-dynamic targets indicates that,with three reference stations,the positioning accuracy for static data achieves 0.399 meters.For high-dynamic targets,with no fewer than six common-view satellites between the target and reference stations,the positioning error does not exceed 2.75 meters.When compared to the measured comprehensive trajectories from other external measurement devices such as optical radar and multi-speed radar,the root mean square of the position difference between the two methods is 6.39 meters.This largely satisfies the positioning requirements for high-dynamic targets.
关键词
网络伪距差分/虚拟参考站技术/弹道测量/扩展卡尔曼滤波/线性内插模型Key words
network RTD/VRS/trajectory measure/EKF/LIM引用本文复制引用
出版年
2024
NETL
NSTL
万方数据