| 引用本文: | 李亮,刘亚勇,李慧,王仁龙,李梦浩.离散小波变换快速探测卫星机动算法[J].哈尔滨工业大学学报,2022,54(12):73.DOI:10.11918/202104138 |
| LI Liang,LIU Yayong,LI Hui,WANG Renlong,LI Menghao.Satellite maneuver rapid detection algorithm based on discrete wavelet transform[J].Journal of Harbin Institute of Technology,2022,54(12):73.DOI:10.11918/202104138 |
|
| 摘要: |
| 针对卫星机动直接影响导航系统的导航、定位和授时服务性能，当导航卫星发生机动时，需要对机动卫星单独处理以生成高精度轨道信息。载波相位三差法可用于卫星机动探测，但受差分测量噪声影响，通过多历元累积方式可减小噪声的影响，但其机动探测结果可能受基线选取的影响。基于此提出了一种离散小波变换的卫星机动快速探测及周期确定方法，在载波相位三差模型基础上，提取载波相位三差残差量，挖掘卫星机动开始及结束时刻载波相位三差残差的先验信息，基于多分辨分析的尺度特性对载波相位三差残差进行分解，分解层数由细节系数和近似系数探测结果确定，通过分析不同频率特性的近似系数和细节系数，获取载波相位三差残差隐含的卫星机动信息，实现对卫星机动的快速探测及周期确定。实验结果表明，相比于传统载波相位三差探测方法，离散小波变换法采用单历元处理方式可更快探测卫星机动，且不同基线探测到的机动结果一致，能更准确地探测卫星机动并确定其周期。 |
| 关键词: 机动快速探测 机动周期 离散小波变换 载波相位三差 卫星机动 |
| DOI：10.11918/202104138 |
| 分类号:P223 |
| 文献标识码:A |
| 基金项目:国家重点研发计划项目(2021YFB3901300);国家自然科学基金(61773132, 61803115);中国博士后科学基金面上项目(2020M681078);山东省博士后创新项目(202003050) |
|
| Satellite maneuver rapid detection algorithm based on discrete wavelet transform |
|
Liang LI1, Yayong LIU1, Hui LI1,2, Renlong WANG1, Menghao LI1
|
|
1.College of Intelligent Systems Science and Engineering, Harbin Engineering University, Harbin 150001, China;2.Harbin Engineering University Qingdao Ship Science and Technology Co., Ltd., Qingdao 266000, Shandong, China
|
| Abstract: |
| Since the satellite maneuvers directly affect the performance of positioning, navigation, and timing service of the global navigation satellite system, when satellite maneuver occurs, the maneuvering satellite needs to be processed separately so as to generate high-precision orbital information. The carrier phase triple difference method can be used for satellite maneuver detection, but it is affected by differential measurement noise. Although such noise can be reduced by multi-epoch accumulation, the results of maneuver detection may be affected by the selection of baseline. Therefore, a satellite maneuver rapid detection and period determination method based on discrete wavelet transform was proposed. On the basis of the carrier phase triple difference model, the carrier phase triple difference residuals were extracted, and the priori information of the triple difference residuals at the start and end moments of satellite maneuvers was exploited. The carrier phase triple difference residuals were then decomposed based on the scale characteristics of multi-resolution analysis. The level of wavelet decomposition was determined by the detection results of detail and approximation coefficients. By analyzing the approximation coefficients and detail coefficients of different frequency characteristics, the satellite maneuver information implicit in the carrier phase triple difference residuals was obtained, and the satellite maneuver rapid detection and period determination could be realized. Experimental results show that compared with the traditional carrier phase triple difference method, the discrete wavelet transform method achieved faster detection of satellite maneuvers by using the single-epoch method, and the results of satellite maneuvering detected by different baselines were consistent, which is a more accurate satellite maneuver detection and period determination method. |
| Key words: maneuver rapid detection maneuver period discrete wavelet transform carrier phase triple difference satellite maneuver |
