The basic principle for determining the speed of moving vehicles with GPS Doppler observed values is discussed, and the availableaccuracy 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。
2
Data about initiatives and portfolios must be collected, assessed for consistency and accuracy, and made available to all those engaged in the work of portfolio Management.
The tests have been available in drugstore chains and online for a few years, but their use has been limited, partly because their accuracy was unclear.