摘要
本文讨论了激光测月解算地面台站坐标和月面反射器的月面坐标过程中初值的影响及迭代求解的稳定性问题。并指出影响地面台站坐标中地心经度分量的精度有两方面的原因，一是平差时采用的UTI值有误差，二是月球的赤经误差，后者将引起地面台站产生一个沿经度方向的系统旋转，而这是所采用的月球星历表的误差所致。通过实例迭代运算表明，测站坐标结果可以收敛到2cm左右，月面反射器在月面柱坐标中的。和Z分量的结果可以稳定在10cm左右，而其λ分量目前只能达到米级。
The initial value problem and the stability of iteration in the processing of sites' andretro - reflectors' coordinates by LLR are discussed. There are two reasons to the error of λ,the geocentric longitude of sites' One is the error of UT, the other is the error of lunar rightascension, and the later can make sites rotate totally along the longitude, which is caused bythe error of adopted lunar ephemerides.Practical iterative calculation shows that the sites' coordinates can be converged to about2cm, the precision of o and Z of retro - reflectors can be up to ab0ut 1O cm, while that of X beup to several meters, the main reason is the uncertainty of the partlal derivative of lunar or bit and lunar libration.
出处
《中国科学院上海天文台年刊》
1996年第17期169-175,共7页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
