双程多卜勒测速

本文从双程多卜勒测速概念出发,给出了双程多卜勒方程提出主要的测量方法和误差源,并对多卜勒测量方法的平均误差作了分析。为了直观起见,本文用几何法推导出多卜勒因子。本文在讨论一般常用的二种测量方法的基础上提出了一种比较理想的方法,这个方法已在实际设备中得到了应用。为了分析测速误差,文中提出了几种主要误差源,尤其是第十种误差源在自旋卫星采用某些特殊天线时必须予以考虑。最后着重分析了多卜勒测量方法和平均误差。在弄清楚平均误差概念的基础上,分析了影响此项误差的主要因素。

THE TWO-WAY DOPPLER RANGE-RATE MEASUREMENT

The two-way Doppler equation isderivated according to the concept of the two-way Doppler range-rate measurement. The major measure methods and error sources are suggested and the analysis of the average error of the Doppler measure method is put forward. For direct sensing, the Doppler factor is derivated using the geometry method. A more ideal measure method based on discussing two conventional measure methods is suggested.The method has been applied to a practical equiqment. In order to analyse the range-rate error, ten major error sources is taken into acc0unt. Among other things,the tenth error source must be considered in the case of the rotation satellite using paetical antennas. Finally, the emphasis is laied on the average error of the Doppler measure method. On the basis of getting a clear understanding of the average error concept, the major factors to influene the error are analysed.