Pointing and tracking errors due to low-frequency deformation in inter-satellite laser communication
Pointing and tracking errors due to low-frequency deformation in inter-satellite laser communication
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DOI：
10.1080/09500340.2018.1538467
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发表时间：
2018-10
影响因子：
1.3
通讯作者：
Chao Wang;Zhang Tao;S. Tong;Ying-chao Li;Lun Jiang;Zhuang Liu;Haodong Shi;Jian-hua Liu;Huilin Jiang
中科院分区：
文献类型：
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作者：
Chao Wang;Zhang Tao;S. Tong;Ying-chao Li;Lun Jiang;Zhuang Liu;Haodong Shi;Jian-hua Liu;Huilin Jiang
提出了一种高斯随机相位屏（GRPS）模型来表示星间激光通信链路中的低频波前变形。该模型用于研究由低频变形引起的指向误差和跟踪误差。理论分析和数值模拟表明，GRPS的均方根值、指向误差和跟踪误差随模型中幅度因子和尺度长度的增大而增大。RMS的期望以线性函数的形式增加，以三次函数的形式增加。指向和跟踪错误的期望值随着和期望值的增加而增加。对于特定的指向误差或跟踪误差，给出了低频波前变形均方根值的99.5%置信区间。根据该置信区间，可以预测一定互向误差下光学天线处理精度的下限。这些结论将有助于设计星间激光通信系统。
ABSTRACT A Gaussian random-phase screen (GRPS) model is proposed to represent the low-frequency wave-front deformation in inter-satellite laser-communication links. The model is used to investigate mutual-alignment errors comprising pointing and tracking errors caused by the low-frequency deformation. Theoretical analysis and numerical simulation show that the GRPS root-mean-square (RMS) value, pointing error, and tracking error increase with the amplitude factor and the scale length in the model. The expectation of RMS increases in the form of a linear function with and increases in the form of a cubic function with . The expectations of the pointing and tracking errors increase with increases in the expected values for and . For a specific pointing error or tracking error, the 99.5% confidence interval of the RMS of the low-frequency wave-front deformation is provided. From this confidence interval, the lower limit of the processing precision of optical antennas corresponding to certain mutual-alignment errors can be predicted. These conclusions are expected to be instrumental in designing inter-satellite laser-communication systems.