摘要
以中国探月工程后续任务中的月面定位需求为背景,探讨了基于同波束干涉测量(SBI)得到的差分DOR延迟与测距、测速等传统跟踪数据联合对月面目标进行相对定位的性能。基于差分DOR延迟的定义推导了基于该观测量的月面目标相对位置观测模型,利用数值仿真的方法,详细讨论了各种情况下的定位精度。ps级的差分延迟数据可以实现对两目标在天平面内dm级精度的二维定位,加入测距数据可将两目标的三维定位精度确定在m级。
The Chinese Lunar Exploration Program tracking telemetry and command（TTC） system needs accurate position determination on the lunar surface.This paper describes a relative position determination system based on delta-differential one way ranging（delta-DOR） acquired by same-beam interferometry（SBI） tracking combined with traditional ranging and Doppler data.The observation model for the relative positioning of the lunar surface targets was developed based on the definition of delta-DOR.The position determination precision was analyzed numerically.SBI data with a precision of pico-seconds enables determination of the relative positions in decimeters in the plane of the sky.Determination of the three dimensional relative position can be achieved to meters using SBI data in combination with ranging data.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第7期1118-1124,共7页
Journal of Tsinghua University(Science and Technology)
基金
中国探月工程二期
关键词
同波束干涉
测速
DOPPLER
定位
same-beam interferometry（SBI）
ranging
Doppler
position determination
