在无线电干涉仪中实现高准确的非相干多普勒跟踪

非相干多普勒跟踪系统中，星载主振器与地面跟踪站的频率基准不相干。就测速准确度而言，非相干多普勒跟踪的性能低于相干多普勒跟踪，但实现起来比较容易。导频单音法可以消除星载主振器的频率漂移对测速准确度的影响。本文结合无线电干涉仪介绍其工作原理。

A Method of Realizing Non-coherent Doppler Tracking with High Accuracy in the Radio Interferometer

The satellite carrying master oscillator (SCMO) is non-coherent with the frequency standard at the ground tracking station in the non-coherent Doppler system. It makes the performance of velocity measurement very poor due to the frequency drift of SCMO in comparison with the coherent Doppler tracking system. The introducing single tone method can eliminate the influence of the frequency drift of SCMO on the accuracy of velocity measurement. This paper describes the principles of this method using the radio interferometer as an example.