| 摘要: |
| 分析了我国现有卫星地面站跟踪天线动态滞后误差形成的机理和经典修正方法，提出了一种基于天线指向偏差的可变差斜率动态滞后修正方法。对实测天线方向图仿真计算出基于角度的灵敏度修正量，对高仰角跟踪实测角度数据通过查表映射进行动态滞后修正处理。与GPS定位数据进行残差比对验证，该方法与原有修正方法相比成倍降低了方位、俯仰测角数据残差的均方根值，可以显著降低高仰角跟踪动态滞后对外测精度带来的影响。 |
| 关键词: 卫星地面站 双通道跟踪天线 动态滞后误差修正 |
| DOI：10.20079/j.issn.1001-893x.240612006 |
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| 基金项目: |
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| A New Dynamic Lag Error Correction Method for Dual-channel Tracking Antenna |
| WU Youxing,LIU Sifang,XI Wenjun,LI Renlong,GONG Chen,GU Rui |
| (1.China Satellite Maritime Tracking and Control Department,Jiangyin 214431,China;2.Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| The authors analyze the formation mechanism and classic correction methods of dynamic lag errors of tracking antennas in China搒 satellite ground stations,and propose a variable difference slope dynamic lag correction method based on antenna pointing deviation.The angle-based sensitivity correction is calculated by simulating the measured antenna pattern.The dynamic lag correction is processed on the high-elevation tracking measured angle data through table lookup and mapping,and the residual error is compared with GPS positioning data.Compared with that of the original correction method,the root-mean-square value of the residual error of pitch angle measurement data is reduced by several times.This method can significantly reduce the impact of dynamic lag in high elevation angle tracking on external measurement accuracy. |
| Key words: satellite ground station dual-channel tracking antenna dynamic lag error correction |
《电讯技术》编辑部 