Lageos卫星激光测距前沿回波数据提取模型及应用  

Extraction model of Lageos′leading edge data and its application

作　　者：周钊冉 秦思[1] 张海峰[1,3] 程志恩[1] 杨昊 张忠萍[1,3] ZHOU Zhao-ran;QIN Si;ZHANG Hai-feng;CHENG Zhi-en;YANG Hao;ZHANG Zhong-ping(Shanghai Astronomical Observatory,Chinese Academy of Science,Shanghai 200030,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Space Object and Debris Observation,Chinese Academy of Science,Nanjing 210008,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]中国科学院大学,北京100049 [3]中国科学院空间目标与碎片重点实验室,江苏南京210008

出　　处：《激光与红外》2021年第11期1433-1439,共7页Laser & Infrared

基　　金：国家自然科学基金(No.11903066,No.U1631240);上海市自然科学基金面上项目(No.20ZR1467500)资助。

摘　　要：Lageos卫星是专用地球动力学卫星,其卫星激光测距数据质量的提升对地球动力学研究具有重要意义。基于Lageos卫星激光角反射器分布,推导了不同层级角反射器回波与反射深度的关系,建立了Lageos卫星前沿回波数据提取模型,并将其应用于上海天文台卫星激光测距数据预处理,验证了该提取模型生成标准点的数据质量改善情况:内符合实验结果表明采用前沿数据提取模型生成的标准点距离参考线的标准差由3.37 mm减小为0.50 mm;外符合实验结果表明前沿数据提取模型处理结果经过快速精密定轨后反馈的距离偏差均值由28 mm减小为21 mm。因此,前沿回波数据提取模型所得标准点数据的稳定性和准确性有一定提升,为获得高质量Lageos卫星激光测距数据提供了一种有效的方法。As one of the most important laser satellite,Lageos serves for the geodynamic research dedicatedly,and the improvement of its satellite laser ranging data quality is of great significance to the study in geodynamics.Based on the distribution of Lageos laser retro-reflectors,the relationship between the echo data of different floors and the reflective depth is deduced,and the extraction model of Lageos leading edge data is established.After applying the model into SHAO′s pre-processing,we compared the results of two methods-the leading edge method and the conventional method.It is proved that the leading edge method improve the NP data quality.The inner coincidence results show that the standard deviation of the distance between the normal points generated by the extraction model and the reference line is significantly reduced,from 3.37 mm to 0.50 mm.The external coincidence results show that the average range bias value is smaller and the normal points generated by the extraction model through participating in the rapid and precise orbit determination,is from 28 mm to 21 mm.Therefore,the stability and accuracy of the normal point could be improved by the extraction model.At the same time,it provides an appropriate thought for producing high-quality Lageos satellite laser ranging data.

关 键 词：卫星激光测距 Lageos卫星 激光反射器 前沿回波 标准点 

分 类 号：TN249[电子电信—物理电子学]