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准天顶卫星系统广播星历精度评定和拟合精度分析

寇瑞雄 杨树文

寇瑞雄, 杨树文. 准天顶卫星系统广播星历精度评定和拟合精度分析[J]. 全球定位系统, 2021, 46(5): 39-47. doi: 10.12265/j.gnss.2021030906
引用本文: 寇瑞雄, 杨树文. 准天顶卫星系统广播星历精度评定和拟合精度分析[J]. 全球定位系统, 2021, 46(5): 39-47. doi: 10.12265/j.gnss.2021030906
KOU Ruixiong, YANG Shuwen. QZSS broadcast ephemeris accuracy evaluation and fitting accuracy analysis[J]. GNSS World of China, 2021, 46(5): 39-47. doi: 10.12265/j.gnss.2021030906
Citation: KOU Ruixiong, YANG Shuwen. QZSS broadcast ephemeris accuracy evaluation and fitting accuracy analysis[J]. GNSS World of China, 2021, 46(5): 39-47. doi: 10.12265/j.gnss.2021030906

准天顶卫星系统广播星历精度评定和拟合精度分析

doi: 10.12265/j.gnss.2021030906
基金项目: 国家重点研发计划项目(2017YFB0504201);国家自然科学基金项目(41761082);甘肃省教育厅:优秀研究生“创新之星”项目(2021CXZX-546);兰州交通大学优秀平台支持项目(201806)
详细信息
    作者简介:

    寇瑞雄:(1995—),男,博士研究生,研究方向为GNSS数据处理

    杨树文:(1975—),男,博士,教授,博士生导师,研究方向为遥感数字图像处理及信息提取、灾害遥感

    通信作者:

    杨树文 E-mail:yangshuwen@mail.lzjtu.cn

  • 中图分类号: P228.4

QZSS broadcast ephemeris accuracy evaluation and fitting accuracy analysis

  • 摘要: 实时导航定位中需要利用广播星历实时计算卫星位置,日本建设的准天顶卫星系统(QZSS)计算卫星位置时通过不断迭代提高计算精度,导致实时解算效率降低. 为了保证QZSS广播星历坐标计算精度且提高运算效率,提出利用切比雪夫多项式拟合卫星轨道. 首先,使用原有方法计算卫星位置,以精密星历为参考,验证QZSS广播星历的卫星坐标精度为米级;然后,针对卫星三维(3D)坐标使用切比雪夫多项式进行拟合,并讨论影响拟合精度的因素,在拟合时间间隔固定时,最优拟合阶数随节点个数增多而增大;不同时间间隔下,不同轨道类型的最优拟合阶数不相等,同一轨道最优拟合阶数相等,但随时间间隔的增大拟合误差也逐渐增大. 结果表明:使用切比雪夫多项式拟合QZSS广播星历时,针对不同的轨道类型选择合适的拟合时间间隔和拟合阶数,其拟合精度和运算效率均可满足需要.

     

  • 图  1  360 s时间间隔最佳拟合阶数下J01卫星拟合误差

    图  2  360 s时间间隔最佳拟合阶数下J07卫星拟合误差

    表  1  空间大地坐标系误差统计 m

    卫星编号轨道类型MaxMeanStd
    XYZXYZXYZ
    J01IGSO3.8103.5952.8832.3322.0001.5760.4200.6811.729
    J02IGSO2.9222.4861.6290.7190.6260.3800.4490.6770.433
    J03IGSO2.6746.1641.4631.0010.8990.6090.8071.0980.676
    J07GEO3.2314.4720.5932.2842.4920.1760.4930.5240.217
    下载: 导出CSV

    表  2  卫星轨道坐标系误差统计 m

    卫星编号轨道类型MaxMeanStd
    RTNRTNRTN
    J01IGSO1.5441.0244.5410.4970.2723.5360.4720.2720.347
    J02IGSO2.0582.3883.0910.2340.3990.9180.3360.5200.592
    J03IGSO4.6475.3153.3090.3690.6481.2380.5951.1560.450
    J07GEO3.4841.8044.3920.9240.5593.1101.2030.6820.638
    下载: 导出CSV

    表  3  X方向上节点个数与拟合阶数不同组合的拟合误差 mm

    拟合阶数节点个数
    7101316
    MaxMeanStdMaxMeanStdMaxMeanStdMaxMeanStd
    6899.80145.100149.8008102.0001612.0001417.00041417.0008704.0007484.000148251.00032118.00027246.000
    712.481.2171.887138.70018.77020.290885.800139.400137.4003890.000651.300625.200
    82.7010.2110.31519.3502.0202.528102.00012.03014.070
    90.4210.0340.0380.5660.0460.0532.6820.2240.323
    101.4120.0760.1150.4020.0290.0310.2570.0270.027
    110.4540.0360.0430.3580.0280.029
    121.6090.0550.0990.4840.0300.034
    1323.8900.7712.0900.9240.0430.064
    142.2870.0820.185
    1538.9500.7552.423
    16464.80010.31035.490
    下载: 导出CSV

    表  4  Y方向上节点个数与拟合阶数不同组合的拟合误差 mm

    拟合阶数节点个数
    7101316
    MaxMeanStdMaxMeanStdMaxMeanStdMaxMeanStd
    6898.20145.40150.9008092.0001620.0001426.00041347.0008765.0007516.000147966.00032417.0027293.000
    712.641.221.893140.50018.81020.370896.800139.600138.0003935.000651.20628.500
    82.6820.2120.31619.3102.0222.541101.70012.0114.180
    90.4920.0370.0420.5290.0480.0542.7600.2270.325
    101.2410.0770.1160.3540.0310.0330.2720.0300.030
    110.6440.0380.0460.3050.0300.032
    121.8070.0570.1000.5070.0320.036
    1323.2800.7942.1371.0950.0440.064
    142.5180.0810.182
    1527.5300.6852.096
    16434.7008.75229.63
    下载: 导出CSV

    表  5  Z方向上节点个数与拟合阶数不同组合的拟合误差 mm

    拟合阶数节点个数
    7101316
    Max Mean Std Max Mean Std Max Mean Std Max Mean Std
    6272.40028.68039.6802452.000319.400389.80012537.0001721.0002075.00044904.0006328.0007602.000
    73.1400.2560.48634.6203.9335.498221.20029.17037.900970.300136.200173.600
    80.7930.0520.0895.8490.4930.73330.8402.9374.112
    90.1380.0100.0120.1450.0130.0150.7900.0650.101
    100.7560.0430.0730.0840.0070.0070.0580.0060.006
    110.2640.0120.0180.0690.0070.006
    120.6150.0260.0520.1150.0080.009
    1324.4500.5471.6940.4730.0170.034
    141.7770.0490.128
    1525.2100.4961.726
    16399.6008.28127.580
    下载: 导出CSV

    表  6  X方向上节点个数与拟合阶数不同组合的拟合误差 mm

    拟合阶数节点个数
    7101316
    MaxMeanStdMaxMeanStdMaxMeanStdMaxMeanStd
    515.1902.7172.589100.10019.25017.790391.10076.92070.0601128.000225.700204.400
    60.3350.0440.0431.4190.2460.2277.2311.3091.20126.3504.8374.389
    70.3910.0420.0460.2910.0350.0360.2980.0400.0360.5440.0980.084
    80.3390.0360.0390.2680.0340.0350.2420.0330.033
    90.5700.0420.0490.3280.0350.0370.2460.0340.034
    101.5760.0820.1210.4510.0370.0400.2790.0340.035
    110.8160.0450.0560.4360.0360.038
    121.4420.0680.1150.5400.0390.044
    1328.6800.7672.1591.0240.0510.073
    142.5220.0880.186
    1533.0700.7232.216
    16410.6009.28630.570
    下载: 导出CSV

    表  7  Y方向上节点个数与拟合阶数不同组合的拟合误差 mm

    拟合阶数节点个数
    7101316
    MaxMeanStdMaxMeanStdMaxMeanStdMaxMeanStd
    513.2802.4412.34188.51017.33016.160348.70069.37063.9801014.000204.000187.500
    60.2680.0370.0341.2520.2260.2076.2881.1991.09421.8704.4073.989
    70.2760.0320.0350.2310.0270.0280.2310.0330.0290.5290.0880.077
    80.2380.0290.0300.1940.0270.0270.1940.0260.026
    90.4620.0350.0380.2530.0280.0280.2010.0260.026
    101.2670.0900.1340.3050.0290.0310.2240.0270.027
    110.5890.0380.0450.3730.0280.029
    121.3110.0590.1000.4400.0310.034
    1328.9600.9652.5701.2370.0520.083
    142.4360.0900.200
    1546.3101.1643.604
    16462.50010.91037.540
    下载: 导出CSV

    表  8  Z方向上节点个数与拟合阶数不同组合的拟合误差 mm

    拟合阶数节点个数
    7101316
    MaxMeanStdMaxMeanStdMaxMeanStdMaxMeanStd
    518.4304.8433.817117.90033.94025.630446.500133.94099.5401246.000388.300287.700
    60.2350.0370.0392.1330.4200.36910.9902.2821.95639.4708.4327.132
    70.0020.0000.0000.0160.0030.0020.0910.0180.0150.3630.0810.067
    80.0010.0000.0000.0050.0010.0010.0270.0040.004
    90.0000.0000.0000.0000.0000.0000.0000.0000.000
    100.0010.0000.0000.0000.0000.0000.0000.0000.000
    110.0000.0000.0000.0000.0000.000
    120.0010.0000.0000.0000.0000.000
    130.0430.0010.0030.0010.0000.000
    140.0030.0000.000
    150.0420.0010.003
    160.5280.0130.041
    下载: 导出CSV

    表  9  J01卫星不同时间间隔下最优组合的误差统计

    时间间隔/s节点个数拟合阶数X/mmY/mmZ/mm
    MaxMeanStdMaxMeanStdMaxMeanStd
    12031100.2080.0250.0230.2460.0270.0260.0520.0070.006
    18021100.2090.0260.0250.2380.0280.0280.0530.0060.005
    24016100.2570.0270.0270.2720.0300.0300.0580.0060.006
    30013100.3580.0300.0320.3460.0330.0350.0780.0080.007
    36011100.6960.0370.0440.7560.0400.0500.1300.0100.013
    下载: 导出CSV

    表  10  J07卫星不同时间间隔下最优组合的误差统计

    时间间隔/s节点个数拟合阶数X/mmY/mmZ/mm
    MaxMeanStdMaxMeanStdMaxMeanStd
    1203170.4810.0910.0760.4320.0820.0700.3070.0750.060
    1802170.5180.0950.0800.4790.0850.0740.3350.0780.064
    2401670.5440.0980.0840.5290.0880.0770.3630.0810.067
    3001370.6150.1000.0880.5660.0900.0810.3950.0830.070
    3601170.6630.1020.0930.6110.0910.0850.4340.0840.075
    下载: 导出CSV
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  • 收稿日期:  2021-03-09
  • 网络出版日期:  2021-11-02

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