FCM测站定权的LAGEOS-2卫星精密定轨影响分析  

Influence of FCM Station Weighting on Precise Orbit Determination of LAGEOS-2 Satellite

作　　者：王军傲 钟世明 张杰 周冲冲 郭钊 路润民 WANG Jun’ao;ZHONG Shiming;ZHANG Jie;ZHOU Chongchong;GUO Zhao;LU Runmin(State Key Laboratory of Geodesy and Earth’s Dynamics,Innovation Academy for Precision Measurement Science and Technology,Wuhan 430077,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Wuhan National Geodetic Observatory,Innovation Academy for Precision Measurement Science and Technology,Wuhan 430077,China)

机构地区：[1]中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室,武汉市430077 [2]中国科学院大学地球与行星科学学院,北京市100049 [3]中国科学院精密测量科学与技术创新研究院武汉大地测量国家野外科学观测研究站,武汉市430077

出　　处：《大地测量与地球动力学》2024年第7期684-689,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(42304194);武汉市知识创新专项(2022010801020138)。

摘　　要：由于卫星激光测距(satellite laser ranging, SLR)台站的测距精度和稳定性存在差异,精密定轨中需要对不同性能的台站赋予不同权重。本文将模糊C均值(fuzzy C-means, FCM)聚类定权应用于LAGEOS-2精密定轨,并比较原始测站定权和FCM定权对轨道精度的影响。结果表明:1)相较于原始测站定权,FCM定权更能反映各SLR台站的性能,提高定轨精度和观测值数量;2)对于ILRS四个质量分析机构,原始测站定权下JCET发布的质量报告在定轨精度上略优于其他中心,采用FCM定权后,以4个机构发布的质量报告进行定轨的结果在同一水平,轨道精度为4.83~4.86 cm。Due to the differences in ranging accuracy and stability of satellite laser ranging(SLR)stations,different weighting must be assigned to stations with different performance in precision orbit determination.We apply the fuzzy C-means(FCM)cluster weighting to precise orbit determination of LAGEOS-2 and compare its impact on orbit accuracy with the original station weighting.The results show that:1)Compared to the original station weighting,FCM weighting better reflects the performance of each SLR station,improves orbit accuracy and increases observation quantity.2)Among the four quality analysis centers of ILRS,under the original station weighting,the quality reports of JCET exhibit slightly superior orbit accuracy compared to other centers.When using FCM weighting,the results obtained from quality reports of all four analysis centers yield similar orbit accuracy level,ranging between 4.83 and 4.86 cm.

关 键 词：卫星激光测距 模糊C均值聚类定权 卫星精密定轨 

分 类 号：P228[天文地球—大地测量学与测量工程]