The basic principle for determining the speed of moving vehicles with GPS Doppler observed values is discussed, and the available accuracy with this method is presented.

讨论了利用GPS多普勒频移观测值确定运动载体速度的基本原理，估计出采用这一方法可以达到的精度。

youdao

Conclusions Color Doppler ultrasonography can raise the accuracy of diagnosis in the occlusive arterial diseases of lower extremity.

结论彩色多普勒超声能帮助提高下肢动脉闭塞性疾病的诊断准确性。

youdao

In the displacement measurement system of scattering surface laser Doppler effect, the measuring accuracy is affected by the weakly Doppler signal that may be lost or discontinuous.

利用激光多普勒效应实现固体面内位移测量时，由于散射光的多普勒信号十分微弱，有时还出现淹没或不连续，影响位移测量精度。

youdao

Conveniently, more modern spacecraft than the Pioneers include separate range-finding hardware, which can be used to test the accuracy of the Doppler method.

ECONOMIST: A space oddity