一种长基线高精度时差测向算法  

An Ultra-precision Time Difference DF Algorithm Based on Long Baseline

作　　者：郁涛[1] 

机构地区：[1]中国电子科技集团公司第五十一研究所,上海201802

出　　处：《无线电工程》2015年第9期34-36,共3页Radio Engineering

摘　　要：由一维双基程差方程即能直接获得长基线测向公式,在进行合理简化之后又可得到形式非常简单的单基程差测向式。如仅从外在表现形式而言,和现有的短基线近似测向式相比,新的在较长基线上仍具有较好计算准确度的单基线测向式,仅是将计算基准点从基线的端点移到了基线的中点位置处。初步的误差分析表明,在基线大于数千米的条件下,基于时差测量的测向误差可小于0.1°。The long baseline DF formula is obtained through path difference equation based on one-dimensional double baseline. After performing rational predigestion for the path difference equation, a single baseline DF formula can be obtained, which has better accuracy in calculation for long baseline and very simple form.As far as external format is concerned, new formula is only transferring the orientation from endpoint into median point of baseline as compared with existing approximate DF formula based on short baseline. The error analysis based on time difference measurement shows that the DF error of new formula can be less than 0.1 degree on condi- tion that baseline is more than some kilometers.

关 键 词：时差测向 超精度 长基线 无源定位 

分 类 号：TN974[电子电信—信号与信息处理]