CAJ | 학술논문

卫星激光测距通过测量激光脉冲在地面观测站和卫星之间的往返时间来计算卫星到测站的距离。激光反射器位置到卫星质心的距离即质心改正(C oM)需要精确标定，以提高卫星测距精度。卫星激光反射器的质心改正误差主要由角反射器分布效应引起，质心改正与激光束的入射角、角反射器排列结构和地面测距站位置有关。卫星角反射器对光子的反射概率与反射器的有效雷达截面积成正比，本文对角反射器的有效雷达截面面积进行拟合，建立以入射角为随机变量的概率模型，计算了球形LAGEOS‐1/2的质心改正值，基于长期观测数据使用不同质心改正值进行了精密定轨，分析了其加权残差变化。同时，对 BeiDou‐M3的角反射器为平面阵列的情况进行了讨论，计算了质心改正值，用一个月的数据进行精密定轨。试验结果表明，基于概率理论的模型在精密轨道中与国际激光测距服务(I LRS)公布的结果相当，说明概率模型适用于球型卫星或非球型卫星。
위성격광측거통과측량격광맥충재지면관측참화위성지간적왕반시간래계산위성도측참적거리。격광반사기위치도위성질심적거리즉질심개정(C oM)수요정학표정，이제고위성측거정도。위성격광반사기적질심개정오차주요유각반사기분포효응인기，질심개정여격광속적입사각、각반사기배렬결구화지면측거참위치유관。위성각반사기대광자적반사개솔여반사기적유효뢰체절면적성정비，본문대각반사기적유효뢰체절면면적진행의합，건립이입사각위수궤변량적개솔모형，계산료구형LAGEOS‐1/2적질심개정치，기우장기관측수거사용불동질심개정치진행료정밀정궤，분석료기가권잔차변화。동시，대 BeiDou‐M3적각반사기위평면진렬적정황진행료토론，계산료질심개정치，용일개월적수거진행정밀정궤。시험결과표명，기우개솔이론적모형재정밀궤도중여국제격광측거복무(I LRS)공포적결과상당，설명개솔모형괄용우구형위성혹비구형위성。
Satellite laser ranging system calculates the distance from ground‐based observatories to satellites using the round‐trip travel time of laser pulse.The position of retro‐reflectors on satellites needs to be corrected which is helpful to improvie the measuring precision of satellite laser ranging.The correction errors of center‐of‐mass(CoM)are mainly caused by the distribution effects of retro‐reflectors on satellites. CoM is related to incident angle,structural alignment of retro‐reflectors and ground‐based position.Based on the reflecting probability of photons for retro‐reflectors is proportional to the cross sections of retro‐reflectors,the cross section area of corner reflectors is fitted and the probabilistic model is established using incident angle as the random variable.The corrections of CoMs of spherical satellite such as LAGEOS‐1/2 are calculated and different CoMvalues are applied for SLR precise orbit determination using long‐term full rate observation data with different WRMS results analyzed.At last,for the planar array ret‐ro‐reflectors,the CoMs of BeiDou navigational satellite such as BeiDou‐M3 are also calculated and analyzed using one month SLR full rate data.The result shows that the calculated CoMs based on probability theory have the comparative precision in SLR precise orbit determination.