sight line velocity

The whole system, including the HII region and the gas-dust ring, moves at a sight line velocity of-61.0 km/ s in a large cloud that has a sight line velocity of-57 km/ s.

包括环和HⅡ区在内的整个系统视向速度为-61km/s，该系统居于视向速度为-57km/s的更大分子云中。

The law of angular velocity and angular acceleration of line of sight is analyzed under different closest distances between OMV and target.

研究了轨道机动飞行器对地球同步轨道卫星的抵近飞行过程。分析了不同过捷点距离下的视线角速度和视线角加速度的变化规律。

In order to get the three-dimensional configuration of velocity fields on the Sun, we have to obtain not only the two-dimensional velocity field maps given by direct observations but also the depth gradients of line-of-sight velocities.

为了得到太阳速度场的三维图像，除由观测直接取得二维的速度场图外，还须测定视向速度的深度梯度。