单星指的是不与任何其他同类星体形成聚星系统的单一天体。 单星组成的恒星系统极为简单，围绕恒星运行的小星体（例如行星）的轨道也简单。
而在别的条件下，奇点相应于单星。
Under other conditions the singular point corresponds to a single star.
研究表明，对单星无源定位的理论和工程实现，尚需作进一步的研究。
The research results showed that the theory and engineering implementation of passive location by single reconnaissance satellite were need more investigation.
该方法适用于单星sar以及分布式sar高精度多普勒参数的估算。
This method is suitable for both single SAR and distributed SAR Doppler parameters precision calculations.
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