range rate accuracy

This paper proposes a computation method for initial orbit determination and orbit improvement with ranging and range rate data at low angular measurement accuracy or unavailability of angular measurement data based on the ( Unit-Vector-Method ( UVM)) principle.

根据单位矢量法测轨原理，给出了在测角精度比较低或没有测角资料的情况下，利用测距、测速资料进行初轨和轨道改进的计算方法。

Results Five residual solvents were completely separated. The liner range and the recoveries were satisfied. The RSD of precision and accuracy was less than 8%, the average recovery rate was in the range of 87.1%~ 105.6%.

结果5种有机溶剂分离完全，在所考察的浓度范围内线性关系良好，r为0.9994～0.9988，平均回收率为87.1%～105.6%，精密度、重复性RSD均小于8%。