基于双星编队的高精度光载波相位测量技术  

High-Precision Optical Carrier Phase Measurement Technology Based on Two-Satellite Formation

作　　者：杨克元 姚鑫 李嘉敏 王国永 张中英 Yang Keyuan;Yao Xin;Li Jiamin;Wang Guoyong;Zhang Zhongying(Institute of Space Communication and Navigation Technology,Fifth Research Institute(Xi’an)of China Aerospace Science and Technology Corporation Limited,Xi’an 710100,Shaanxi,China)

机构地区：[1]中国航天科技集团有限公司第五研究院西安分院空间通信与导航技术研究所,陕西西安710100

出　　处：《激光与光电子学进展》2023年第7期165-172,共8页Laser & Optoelectronics Progress

基　　金：国防科技173计划重点项目;国家自然科学基金(11803023);中国航天科技集团公司自主研发项目。

摘　　要：基于双星编队的激光干涉测距载荷能够在轨验证基于三星编队的空间引力波探测任务的多项关键技术。在空间引力波探测任务中,为实现皮米级的星间位移测量精度,要求在mHz频段实现优于10−6 cycle/Hz1/2的光载波相位测量精度。限制测相精度的瓶颈因素在于相位计中模数转换器的采样抖动。利用导频和时钟边带调制技术可在数据后处理中抑制采样抖动噪声。将面向三星编队时间延迟干涉组合的时钟边带调制技术推广到更普遍的基于双星编队的双向光载波相位测量系统中,并考虑到星间多普勒频移,给出了抑制光载波相位测量过程中采样抖动噪声的系统性方案。该方案能够应用在下一代地球重力场探测任务中,以在轨验证面向空间引力波探测的相位计技术,同时有望应用于高精度星间激光时频传递项目,支撑未来全球卫星导航系统。The payload of laser ranging interferometer based on the two-satellite formation can on-orbit show numerous vital technologies in the space-based gravitational wave detection mission.In this mission,to realize the picometer-level precision in the inter-satellite displacement measurement,it is required to achieve the optical carrier phase measurement with an accuracy of better than 10−6 cycle/Hz1/2 in the mHz frequency range.The sample jitter of the phase meter’s analogto-digital converter is the bottleneck limiting the precision of the phase measurement.By applying the techniques of pilot tone and clock side-band modulation,the sampling jitter noise could be suppressed in the data post-processing algorithm.The clock side-band modulation method towards time-delay interferometry in the three-satellite formation is extended to the two-satellite formation-based dual optical carrier phase measuring system.The systematic approach is proposed to suppress the sampling jitter noise in the optical carrier phase measurement considering the inter-satellite Doppler frequency shift.The technique could be applied in the next-generation earth gravitational detection mission to on-orbit demonstrate the phase meter technology towards space-based gravitational wave detection.Furthermore,it could be used in the highprecision inter-satellite laser time and frequency transfer mission,supporting the future global navigation satellite system.

关 键 词：测量 相位测量 干涉度量法 光载波 拍频 边带调制 

分 类 号：O436[机械工程—光学工程]